Meyer Sound Speaker CQTM Series User Manual

CQ Series  
Operating Instructions  
Self-Powered Loudspeaker  
Patents Pending  
Features  
Wide and narrow overage patterns  
for CQ-1 (low Q) and CQ-2 (high Q)  
Self-contained control electronics,  
amplifiers, and drivers  
Dual-channel 1240 Watt amplifier  
(620 Watts per channel)  
Active balanced input circuit  
Active crossover with optimized  
pole-zero filter combinations  
Intelligent AC™ System  
TruPowerLimiting (TPL)  
Compatible with the Remote  
Monitoring System™ (RMS)  
The CQSeries self-powered loudspeakers contain  
independent amplifier and control electronics for one  
15” bass-reflex cone driver and one 4” diaphragm horn  
driver in a compact enclosure. This integrated design  
eliminates amplifier racks, simplifies setup and  
installation, and improves durability and reliability.  
Meyer Sound developed the CQ Series horns in an  
anechoic chamber by measuring coverage patterns  
using angular and frequency resolutions of 1° and  
124 octave, respectively. The CQ Series horns exhibit  
Constant Q: the beam width remains consistent across  
the horns operating frequency range in both the vertical  
and horizontal planes. The CQ-1 has a wider horizontal  
beam width than the CQ-2. The CQ Series have the  
same vertical beam width and share the following  
remarkable attributes:  
The CQ Series, consisting of the CQ-1 (low Q) and  
CQ-2 (high Q), are efficient full-range speakers and  
ideal companions for the PSW-2, PSW-4, and 650-P  
self-powered subwoofers. The CQ Series have the  
following acoustical specifications:  
• uniform frequency response within the beam width  
• rapid and uniform amplitude attenuation for all  
frequencies outside the beam width  
Frequency Response  
Phase Response  
±4 dB 40 Hz – 18 kHz  
±90° 50 Hz – 16 kHz  
CQ-1: 136 dB; CQ-2: 139 dB  
> 110 dB  
minimal side lobes  
Max Peak SPL at 1 m  
Dynamic Range  
The CQ horns are an unprecedented development in  
acoustical measurement, design, and manufacturing.  
The CQ Series loudspeakers are ideally suited for venues  
requiring precise coverage with minimal interaction  
between subsystems but are appropriate for any  
acoustical environment.  
The CQ is phase-corrected through the crossover, which  
yields exceptional system impulse response and  
accurate signal reproduction.  
The beam width of a horn is the angle at which the  
sound pressure at a given frequency decreases to half  
(–6 dB) its on-axis value. Most horns have a beam width  
that varies with respect to frequency, nonuniform  
frequency response within their coverage area, and  
significant side lobes outside their beam width. These  
undesirable characteristics are easily identified by  
viewing polar patterns plotted at various frequencies.  
The CQ can be equipped to operate with the Remote  
Monitoring System™ (RMS) interface network and  
software application. RMS displays signal and power  
levels, driver and cooling fan status, limiter activity, and  
amplifier temperature for all speakers in the network on  
a Windows-based PC.  
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Contents  
Complete Systems .............................................. 8  
Controls and Connectors .................................. 3  
Dimensions ........................................................ 3  
AC Power ........................................................... 4  
Audio Input ........................................................ 5  
Limiting and Protection Circuitry ..................... 6  
Rigging ............................................................... 7  
Verifying Polarity............................................... 10  
Coverage Angles and Polar Plots..................... 11  
Array Design ...................................................... 14  
Safety Summary................................................ 15  
Specifications .................................................... 16  
Controls and Connectors  
!
!
WARNINGS:  
THIS PRODUCT MUST BE GROUNDED  
This surface may reach high temperatures while in use.  
WARNINGS
THIS PROD
This surface may
To ensure proper operation, allow at least  
6
inches  
Mains AC inlet  
To ensure proper w  
clearance from th
clearance from this surface and adequate ventilation.  
To reduce the risk of electric shock do not remove cover.  
No operator serviceable parts inside.  
a
Mains circuit  
breakers  
To reduce the risk oo  
No operator services  
Refer servicing to qo  
To reduce the risk o
Refer servicing to qualified personnel.  
To reduce the risk of fire or electric shock  
do not expose this appliance to rain or moisture.  
Tie-wrap anchor  
do not expose this
r
ATENCIÓN  
AUTORIZADO  
:
ACCESO INTERNO SOLO  
ATENCIÓN  
AUTORIZADO  
:
ACCR  
PE
CQ  
A
PERSONAL TÉCNICO CALIFICADO  
A
ACHTUNG  
:
GEHÄUSE NICHT ÖFFNEN WARTUNG  
ACHTUNG  
UND REPARATUR N
:
GEHÄH  
UND REPARATUR NUR DURCH ELEKTROFACHKRÄFTE  
High Limit (red)  
Low Limit (red)  
HI Limit  
ATTENTION ENTRETIEN ET REPARATIONS  
INTERNES NE SONT AUTORISEES QU'AU  
PERSONNEL TECHNIQUE QUALIFIÉ  
:
LO Limit  
ATTENTION  
INTERNES NE SONT AU  
PERSONNEL TECHNIA  
:
ENTR
E
Active  
/
Speaker Fault  
UK WARNING: THIS APPARATUS MUST BE EARTHED.  
UK WARNING TH
:
NO OPERATOR SERVICEABLE PARTS INSIDE.  
REFER SERVICING TO QUALIFIED PERSONNEL  
NO OPERATOR SERVIC
Input Polarity  
PUSH  
REFER SERVICING TO Q
H  
Power LED (green/red)  
Input polarity switch  
2
3
+
+
Auto-Voltagc  
10A RMS  
20A Peak  
10K  
Balanced  
Auto-Voltage Select  
95-125V  
50-60Hz  
~
208-235V~  
50-60Hz  
88-127V  
50-60Hz  
~
1400W RMS MAX 1400W RMS MAX  
1
700W RMS MA
ESD  
220K  
Case  
Operational e  
Turn on 80Vu  
Turn on 160Vu  
2
2
1
1
2
3
1
3
3
1
3
Network  
Earth Chassis  
/
Signal input and  
loop connectors  
Service  
Wink  
Reset Activity  
Network  
Input  
Loop  
Service  
Wink  
Reset Activity  
Input  
Loop  
Remote Monitor System  
Remote Monitoring  
System panel  
Meyer Sound, Berkeley, CA. USA  
Remote Monitoring System  
Meyer Sound, e  
(if RMS is installed)  
Rear User Panel shown with the optional  
Remote Monitoring System (RMS) panel  
European Rear User Panel  
with IEC 309 connector  
Dimensions  
All units in inches  
Front  
Side  
Top  
2.0"  
20.50"  
9.55"  
21.0"  
2.0"  
20.5"  
9.55"  
30.0"  
13.55"  
21.0"  
14.26"  
15.25"  
3
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Power Requirements  
AC Power  
The CQ presents a dynamic load to the AC mains which  
causes the amount of current to fluctuate between quiet  
and loud operating levels. Since different types of  
cables and circuit breakers heat up at varying rates, it  
is essential to understand the types of current ratings  
and how they correspond to circuit breaker and cable  
specifications.  
The AC voltage operating ranges for the CQ Series are  
85–134 V and 165–264 V, at 50 or 60 Hz. The CQ Series  
performs surge suppression for high voltage transients  
and can safely withstand voltages up to 275 VAC.  
The maximum continuous RMS current is the maximum  
RMS current in a period of at least 10 seconds. It is  
used to calculate the temperature increase in cables,  
which is used to select cables that conform to electrical  
code standards. It is also used to select the rating for  
slow-reacting thermal breakers.  
Continuous voltages above 275 VAC may  
damage the unit!  
The Intelligent AC power supply protects the drivers  
and amplifier components when an AC source is applied  
to the CQ by  
The maximum burst RMS current is the maximum  
RMS current in a period of approximately 1 second. It  
is used to select the rating for most magnetic breakers.  
auto-selecting the voltage;  
performing surge suppression and minimizing  
inrush current;  
The maximum peak current during burst is used to  
select the rating for fast-reacting magnetic breakers  
and to calculate the peak voltage drop in long AC  
cables according to the formula  
filtering EMI.  
After three seconds, the main power supply is slowly  
ramped on. The CQ Series uses a NEMA L6-20P or  
IEC 309 male power inlet and satisfies UL, CSA, and  
EC safety standards.  
Vpkdrop = Ipk x Total Cable Resistance  
Use the table below as a guide to select cables and  
circuit breakers with appropriate ratings for your  
operating voltage.  
Use the following AC cable wiring diagram to create  
international or special-purpose power connectors:  
brown = hot  
blue =  
neutral  
CQ Series Current Ratings  
yellow/green =  
earth ground  
(chassis)  
115 V 230 V 100 V  
Max. Continuous RMS  
Max. Burst RMS  
8 ARMS 4 ARMS 10 ARMS  
15 ARMS 8 ARMS 18 ARMS  
22 APEAK 11 APEAK 25 APEAK  
AC cable color code  
If the colors referred to in the diagram don't correspond  
to the terminals in your plug, use the following  
guidelines:  
Max. Peak During Burst  
The minimum electrical service amperage required by  
a system of CQs is the sum of the maximum continuous  
RMS current for each speaker. We recommend allowing  
an additional 30% above the minimum amperage to  
prevent peak voltage drops at the service entry.  
Connect the blue wire to the terminal marked  
with an N or colored black.  
Connect the brown wire to the terminal marked  
with an L or colored red.  
Connect the green and yellow wire to the  
terminal marked with an E (or ) or colored  
green (or green and yellow).  
4
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Safety Issues  
Audio Input  
Pay close attention to these important electrical and  
safety issues.  
The CQ presents a 10 kinput impedance to a three-pin  
XLR connector wired with the following convention:  
Pin 1 — 220 kto chassis and earth ground (ESD clamped)  
Pin 2 — Signal  
Differential Inputs  
Pin 3 — Signal  
Use a power cord adapter to drive the CQ from a  
standard 3-prong outlet (NEMA 5-15R; 125 V max).  
Case — Earth (AC) ground and chassis  
Pins 2 and 3 carry the input as a differential signal;  
their polarity can be reversed with the input polarity  
switch on the user panel. If the switch is in the up  
position, pin 2 is hot relative to pin 3, resulting in a  
positive pressure wave when a positive signal is applied  
to pin 2. Use standard audio cables with XLR connectors  
for balanced signal sources.  
earth  
ground  
chassis  
ground  
The CQ requires a grounded outlet. Always use  
a grounding adapter when connecting to  
ungrounded outlets.  
Shorting an input connector pin to the case  
can form a ground loop and cause hum.  
A single source can drive multiple CQs with a paralleled  
input loop, creating an unbuffered hardwired loop  
connection. Make certain that the source equipment  
can drive the total load impedance presented by the  
paralleled input circuit. For example, since the input  
impedance of a single CQ is 10 k, cascading 20 CQs  
produces a balanced input impedance of 500 . If a  
150 source is used, the 500 load results in a 2.28 dB  
loss.  
Do not use a ground-lifting adapter or cut the AC  
cable ground pin.  
Troubleshooting  
If the Active lamp does not light after connection to an  
AC source for three seconds, the problem is probably in  
the power supply. In the unlikely case that the circuit  
breakers trip (the white center buttons pop out), the  
amplifier or power supply may be malfunctioning.  
Do not reset the breakers! Contact Meyer Sound for repair  
information.  
Keep all liquids away from the CQ to avoid hazards  
from electrical shock.  
Do not operate the unit if the power cables are frayed  
or broken.  
Tie-wrap anchors on the amplifier chassis provide  
strain relief for the power and signal cables. Insert the  
plastic tie-wraps through the anchors and wrap them  
around the cables.  
If abnormal noise (hum, hiss, popping) is produced  
from the loudspeaker, disconnect the audio source  
from the speaker. If the noise stops, then the problem  
is not within the loudspeaker; check your audio and  
AC power sources.  
If problems persist, contact Meyer Sound. If repairs  
are necessary, the CQs modular components are easy  
to remove and ship.  
5
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Troubleshooting with TPL  
Limiting and Protection  
Circuitry  
The TPL LEDs can indicate serious driver problems, if  
interpreted correctly. If one CQ in a system exhibits  
substantially more TPL activity than others receiving the  
same audio signal, then the driver corresponding to  
the excessively active LED may have a short circuit. This  
is a potentially dangerous condition for the electronics;  
shut the CQ down immediately.  
TruPower LimitingSystem  
Conventional limiters assume that the resistance of a  
speaker remains constant and set the limiting threshold  
by measuring voltage only. This method is inaccurate  
because the speakers resistance changes in response  
to the frequency content of the source material and  
thermal variations in the speakers voice coil and magnet.  
Conventional limiters begin limiting prematurely,  
which under-utilizes system headroom and deprives  
the speaker of its full dynamic range.  
The TPL circuit does not activate if there is no power  
dissipation in the driver, regardless of the input signal  
level. Therefore, if all CQs in a system receiving the same  
audio signal exhibit TPL activity except one, then that  
unit may have an open voice coil; disconnect it and  
contact Meyer Sound for repair information.  
TPL can indicate an imbalance in a configuration of  
speakers by functioning like a spectrum analyzer. If the  
speakers in a subwoofer, mid-bass, or mid-hi subsystem  
begin to limit before reaching the required operating  
level for the entire system, then that subsystem needs to  
be supplemented with additional speakers.  
The TruPower Limiting (TPL) system accounts for  
varying speaker impedance by measuring current, in  
addition to voltage, to compute the power dissipation  
and voice coil temperature. TPL  
allows the speaker to deliver its highest SPL  
across its entire frequency range during limiting;  
NOTE: Although the TPL limiters exhibit smooth sonic  
characteristics, we do not recommend using them for  
intentional compression effects. Use an outboard  
compressor/limiter to compress a mixed signal.  
eliminates long-term power compression when  
operated at high levels for extended periods;  
protects the drivers and extends the lifetime of  
amplifier and driver components.  
Hi Limit and Lo Limit LEDs on the user panel indicate  
TPL activity for the high and low frequency drivers,  
respectively. The limiters for each driver function  
independently and do not affect the signal when the  
LEDs are inactive. Limiting begins when the driver  
temperature exceeds the maximum safe level and  
ceases when the temperature returns to normal.  
The CQ performs within its acoustical specifications  
and operates at a normal temperature if the limit LEDs  
are on for no longer than two seconds, and off for at  
least one second. If the LEDs remain on for longer  
than three seconds, the CQ is hard limiting with the  
following negative consequences:  
Increasing the input level will not increase the  
volume.  
The system distorts due to clipping and  
nonlinear driver operation.  
Unequal limiting between the low and high  
frequency drivers alters the frequency response.  
Driver and amplifier components are subjected  
to maximum heat, which shortens their life span.  
6
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Fans and Cooling System  
Rigging  
The CQ uses a forced-air cooling system with two fans  
to prevent the amplifiers from overheating. A variable-  
speed primary fan runs continuously with an inaudible  
operating noise of 22 dBA at 1 m at its slowest speed.  
The speed of the primary fan begins increasing when  
the temperature of the heatsinks reaches 42°C. The  
fan reaches full speed at 62°C and is barely audible near  
the cabinet, even without an audio signal.  
The maximum recommended load for a CQ with air-  
craft pan fittings is 500 lb (228kg). This working load  
is one-fifth the cabinets breaking strength. The CQ  
has two rigging brackets on both the top and bottom  
of the cabinet; each bracket is capable of supporting  
the full working load of the cabinet.  
In the unusual event that the temperature reaches  
74°C, the secondary fan turns on and is clearly audible.  
The secondary fan turns on in response to  
rigging brackets  
(two on top, two on bottom)  
primary fan failure (check its status immediately);  
high source levels for a prolonged period in hot  
temperatures or direct sunlight;  
driver failure.  
The secondary fan turns off when the temperature  
decreases to 68°C.  
Handles are for carrying only.  
Do not use them for rigging!  
!
In the highly unlikely event that the secondary fan  
does not keep the temperature below 85°C, the CQ  
automatically shuts down until AC power is removed  
and reapplied. If the CQ shuts down again after cooling  
and reapplying AC power, contact Meyer Sound for  
repair information.  
There are four types of interchangeable rigging brackets,  
each fastened by six Phillips screws:  
aircraft pan fittings (ring and stud)  
3/ 8”-16 nut plates  
The fans draw air in through ducts on the front of the  
cabinet, over the heatsinks, and out the rear of the  
cabinet. Since dust does not accumulate in the amplifier  
circuitry, its life span is increased significantly. Make  
sure that the air ducts are clear and that there is at  
least 6 inches clearance for exhaust behind the cabinet.  
M-10 x 1.5 metric nut plates  
blank plates (if no rigging brackets are requested)  
NOTE: Units with nut plates are rated for the weight of  
one cabinet only.  
Rigging load ratings assume a straight tensile pull and  
that the cabinet is in new condition with aircraft pan  
fittings. If these conditions are not met, the load ratings  
can be reduced significantly. Load ratings can also be  
reduced by age, wear, and damage. It is important to  
inspect the rigging hardware regularly and replace  
worn or damaged components immediately.  
cooling  
fans  
power  
supply  
air  
The standard model should not be installed outdoors  
without weather protection. The cabinet, exposed  
electronic circuitry, and drivers can all receive weather  
protection treatment that allows the unit to be used  
safely in wet conditions. Contact Meyer Sound for  
information about weather-protected units.  
heatsinks  
A foam insert filter, in combination with the entire  
front grill surface, acts as an air filter for the cooling  
system. Despite the filtering, extensive use or a dusty  
operating environment can allow dust to accumulate  
along the path of the airflow, preventing normal cooling.  
We recommend periodically removing the grill, filter,  
and amplifier module and using compressed air to  
clear dust from the grill, filter, fans, and heatsinks.  
NOTE: All Meyer Sound products must be used in  
accordance with local, state, federal, and industry  
regulations. It is the owner’s and/or user’s responsibility  
to evaluate the reliability of any rigging method for  
their application. Rigging should be done only by  
experienced professionals.  
7
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Meyer Speaker Types  
Complete Systems  
The following Meyer speakers will be mentioned in  
the example applications.  
MSL-4: Self-powered mid-hi speaker  
Speaker Placement and Polarity  
DS-2P: Self-powered mid-bass speaker  
The cabinets in the following example configurations  
are in a close-proximity coplanar orientation, unless  
otherwise stated. Placing the mid-hi speaker more  
than 5 feet from the subwoofer may require setting the  
speakers to opposite polarities to compensate for the  
propagation delay between them.  
650-P, PSW-2,  
PSW-4: Self-powered subwoofers  
650-R2, MSW-2,  
USW-1: Externally amplified subwoofers  
The self-powered speakers listed above have a loop  
connection to send the input signal to another speaker.  
In a coplanar orientation, externally amplified Meyer  
subwoofers require the opposite polarity setting to  
all Meyer self-powered speakers.  
CQ and 650-P  
We recommend using the Meyer SIM® System II  
Sound Analyzer and CP-10 Parametric Equalizer to  
The CQ is particularly well matched with the 650-P and  
also performs efficiently with the PSW-2 and PSW-4.  
Due to the overlap in frequency response between  
the CQ and the subwoofer, the system frequency  
response contains a rise in the range 40–120 Hz. It is  
important to emphasize that the speakers are in phase  
in this region. The rise can be corrected using the Meyer  
CP-10 Parametric Equalizer, if desired.  
assist the process of configuring and placing  
speakers in a system;  
measure propagation delays to set the correct  
polarity between speakers;  
measure and equalize variations in frequency  
response caused by the acoustical environment  
and the placement and interaction of speakers.  
CQ-1 or  
input  
Contact Meyer Sound for assistance w ith your  
application.  
CP-10 EQ  
CQ-2  
(1 Channel)  
loop  
The LD-1A Line Driver  
650-P  
We recommend using the Meyer LD-1A Line Driver  
to integrate different types of Meyer self-powered  
speakers into a full-range system. The LD-1A maintains  
signal integrity for long cable paths, has two channels  
equipped to control a main system, and six auxiliary  
channels for down-fill, front-fill, and delay systems. The  
LD-1A provides these useful functions:  
Set the CQ and 650-P to the same polarity.  
CQ and 650-R2  
Although it is preferable to use the CQ in a completely  
self-powered system, excellent results can still be  
achieved using the 650-R2, USW-1, and MSW-2.  
The Lo Cut switch activates a high-pass filter  
(160 Hz, –12 dB/ oct, Q = 0.8) that performs a  
crossover function for the Mid-Hi output.  
The Array EQ switch activates a filter (6 dB cut  
at 220 Hz, 0.6 octave bandwidth) to equalize  
groups of 3 to 5 horizontally arrayed MSL-4s.  
CQ-1 or  
CQ-2  
input  
CP-10 EQ  
(1 Channel)  
loop  
The DS-2 & Sub Crossover switch activates a  
crossover network that sends frequencies below  
80 Hz to the Sub output, and above 80 Hz to the  
DS-2 output. With the switch out, a full-range  
signal is sent to the DS-2 and Sub outputs.  
650-R2  
B-2EX  
Amplifier  
subwoofer  
CEU  
Set the CQ and the 650-R2‘s amplifier to opposite  
polarities.  
The DS-2 φ and Sub φ switches toggle the polarity  
for the DS-2 and Sub outputs.  
The Mid-Hi, DS-2, and Sub outputs each have  
their own gain control and mute switch.  
8
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CH 5 controls the CQ down-fill system. Since the main  
system is normally set to a higher volume than the  
down-fill system to project farther into the venue, the  
main system is audible in the down-fills coverage  
area. To insure that the speakers combine properly in  
the overlapping coverage area:  
LD-1A with CQ and 650-P  
Activating the Lo Cut filter on the LD-1A for the Mid-Hi  
output also eliminates the low frequency rise caused  
by the overlap between the CQ and 650-P. Although a  
typical CQ : 650-P ratio is 2:1, separate Sub and Mid-Hi  
level controls on the LD-1A allow the ratio to vary  
while maintaining control of the spectral balance of  
the system.  
Set the CQ to the opposite polarity to the MSL-4  
and DS-2P to phase align the mid-hi frequencies and  
minimize the MSL-4’s low frequency down-lobe.  
Use the CH 5 Lo Cut filter to eliminate the low  
frequency rise caused by the overlap with the  
650-P/ DS-2P systems.  
CQ-1 or  
CQ-2  
Mid-hi  
LD-1A  
Line Driver  
Delay the down-fill to compensate for the  
propagation delay between the down-fill and  
main systems in the intersecting coverage area.  
(This is highly recommended, but not required.)  
Sub  
650-P  
We recommend using the Meyer SIM System II Sound  
Analyzer and CP-10 Parametric Equalizer to optimize this  
configuration.  
Set the CQ and 650-P to the same polarity.  
LD-1A with Flown MSL-4, DS-2P, and CQ;  
650-P on the Floor  
MSL-4 Mid-Hi  
LD-1A  
This example shows the LD-1A integrating a complete  
system of speakers appropriate for a large venue.  
Although channels 1, 3, and 5 constitute half of a  
complete system, channels 2, 4, and 6 can be used  
with identical connections to create the other half of  
the system. The MSL-4 mid-hi, DS-2P mid-bass, and  
CQ down-fill speakers are flown; the 650-P subwoofers  
are on the floor.  
CH 1  
CP-10 EQ  
Input  
Mid-Hi  
Output  
Loop  
DS-2  
DS-2P Mid-Bass  
Output  
Sub  
Output  
Delay  
Input  
Output  
CH 3  
Input  
Output  
CP-10 EQ  
The Mid-Hi and CH 3 outputs drive the inner three  
and outer two speakers, respectively, of the MSL-4  
array. These two outputs apply appropriate levels for  
speakers directed at audience locations at different  
distances from the main system. The diagram shows the  
additional mid-hi output created by connecting the  
CH 1 Loop to the CH 3 input. Using a Y-connection at  
the CH 1 input, as shown for the down-fills, accomplishes  
the same signal routing.  
CH 5  
CQ Down-fills  
650-P Subwoofers  
Set the MSL-4 and DS-2P to the same polarity; reverse  
the polarity for the CQ. The polarity for the 650-P depends  
on the displacement from the flown system.  
The Lo Cut and Array EQ switches for the Mid-Hi and  
CH 3 outputs should be in. The Lo Cut filter eliminates  
the rise caused by the overlap between the MSL-4 and  
DS-2P/ 650-P systems. The Array EQ filter minimizes  
the low-mid rise caused by the MSL-4 array.  
The DS-2 and Sub outputs drive the DS-2P and 650-P  
systems with the DS-2 & Crossover switch in. Set the  
MSL-4 and DS-2P to the same polarity. The polarity of  
the 650-P depends on the displacement from the flown  
system.  
9
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Driver Polarity in the Same Loudspeaker  
Verifying Polarity  
Use the following test procedure to verify polarity  
between drivers in the same loudspeaker:  
Incorrect driver polarity impairs system performance  
and m ay d am age the d rivers. All Meyer Sound  
loud speakers are shipped with the drivers in correct  
alignment. However, if the driver or circuit wiring has  
been removed or disassembled in any loudspeaker in  
a system for any reason, check the polarity between  
adjacent loudspeakers and between drivers in the  
same cabinet.  
1. Place a monitoring microphone three ft from the  
front of the loudspeaker at the midway point  
between the low and high frequency drivers.  
2. Connect a signal source to the loudspeaker and  
note the frequency response.  
!
Since polarity reversal causes excessive driver  
excursion at high source levels, use moderate levels  
when conducting this test.  
Polarity Between Adjacent Loudspeakers  
Use the following test procedure to verify the polarity  
between adjacent loudspeakers of the same type:  
1. Position two loudspeakers adjacent to each other.  
2. Place a measurement microphone six ft from the  
speakers on the axis between them.  
3. Connect a signal source to one speaker and note  
the frequency response and overall level.  
Drivers with correct  
polarity cause acoustic  
addition  
Drivers with reversed  
polarity cause acoustic  
cancellation  
4. Apply the same signal to the second speaker with  
the first speaker still connected.  
The polarity is correct if the frequency response is smooth  
through the crossover region (±4 dB 600 Hz – 1 kHz).  
Severe cancellation in the crossover region indicates  
polarity reversal.  
Top view of adjacent speakers with  
measurement microphone  
Correct polarity causes  
acoustic addition  
Opposite polarity causes  
acoustic cancellation  
The polarity is correct if the frequency response  
rem ains constant w ith a significant increase in  
am plitud e. Broadband cancellation (decreased overall  
level) indicates polarity reversal.  
10  
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The table below lists the maximum on-axis peak dB SPL  
per octave measured at 1 m for the CQ-1 and CQ-2.  
Coverage Angles and  
Polar Plots  
Maximum Peak dB SPL  
Frequency  
CQ-1  
CQ-2  
Coverage Angles  
125 Hz  
250 Hz  
500 Hz  
1 kHz  
2 kHz  
4 kHz  
8 kHz  
127  
130  
130  
132  
136  
136  
132  
127  
130  
130  
139  
139  
139  
134  
The coverage angles for the CQ Series over a wide  
frequency range are summarized in the following table:  
CQ Series Coverage Angles  
horizontal1  
vertical2  
CQ-1 (–6 dB points)  
CQ-1 (–10 dB points)  
CQ-2 (–6 dB points)  
CQ-2 (–10 dB points)  
80°  
40°  
100°  
50°  
50°  
40°  
50°  
16 kHz  
122  
124  
60°  
1. CQ-1: 500 Hz–16 kHz; CQ-2: 800 Hz–12 kHz  
2. CQ-1 and CQ-2: 1.5–12 kHz  
The –6 dB points denote the angle at which the measured  
SPL has decreased to half its on-axis value. The –10 dB  
points represent the angle at which the perceived SPL  
has decreased to half its on-axis value.  
Polar Plots  
The data for the CQ Series polar patterns was measured  
in Meyer Sounds anechoic chamber (photo at right)  
with the SIM System II Sound Analyzer in dB SPL at a  
distance of 14 ft, using angular and frequency resolutions  
1
of 1° and ⁄24 octave, respectively. The polar plots on  
the following pages have been smoothed to angular  
and frequency resolutions of 2° and 1 octave, and  
normalized to 0 dB on-axis. Each polar pattern shows  
the response of a 1 octave band centered at the frequency  
indicated on the plot; there are no gaps in the data  
from 125 Hz to 16 kHz.  
The polar patterns reveal that the CQ-1 has a wider  
horizontal coverage pattern than the CQ-2 and that  
their vertical coverage is virtually identical. The uniform  
beam width that distinguishes the CQ Series is evident  
in their polar patterns in the horns range (1–16 kHz);  
note the lack of side or back lobes.  
Meyer Sound’s anechoic chamber  
11  
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CQ-1 Polar Plots  
vertical  
Inner plot is vertical unless  
otherwise indicated.  
CQ-1: 250 Hz  
CQ-1: 125 Hz  
vertical  
vertical  
CQ-1: 500 Hz  
CQ-1: 1 kHz  
CQ-1: 2 kHz  
CQ-1: 4 kHz  
CQ-1: 8 kHz  
CQ-1: 16 kHz  
12  
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CQ-2 Polar Plots  
vertical  
Inner plot is vertical unless  
otherwise indicated.  
CQ-2: 125 Hz  
CQ-2: 250 Hz  
vertical  
vertical  
CQ-2: 500 Hz  
CQ-2: 1 kHz  
CQ-2: 2 kHz  
CQ-2: 4 kHz  
CQ-2: 8 kHz  
CQ-2: 16 kHz  
13  
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A series of outdoor tests was conducted at Meyer Sound  
to determine the coverage angle and on-axis SPL for  
arrays with one and two horizontal rows of up to four  
elements each, at numerous splay angles. The measurements  
were conducted at a distance of 8 m with half-space  
loading; on-axis SPL values were interpolated from  
8 m to 1 m. The coverage angle for the array is the result  
of averaging the –6 dB points from 125 Hz to 8 kHz.  
Array Design  
Creating an effective array with the CQ requires a  
precise understanding of how to combine the coverage  
area and SPL of the individual speaker with those of  
adjacent speakers. Array design is a trade-off between  
increasing on-axis power and creating smooth transitions  
between the coverage areas of adjacent speakers.  
The horizontal splay angles in the tables below represent  
the optimal configurations for narrow and wide coverage  
areas; note the different angles for the CQ-1 and CQ-2.  
The vertical angles represent the optimal narrow (15°),  
middle (30°), and wide (40°) orientations for both the  
CQ-1 and CQ-2. The 2@0° LT denotes the long throw  
configuration: the two horns are coupled directly  
together (top speaker upside down/ bottom speaker  
upright) to form a single narrow horn.  
As the splay angle (the angle between adjacent cabinet  
faces) decreases below the coverage angle of the  
individual speaker, the on-axis power increases, but  
the coverage overlap between adjacent speakers causes  
comb filtering and other frequency response variations.  
As the splay angle increases toward the coverage  
angle, the on-axis power decreases, but the variations  
in frequency response diminish. As the splay angle  
increases beyond the coverage angle, noticeable gaps  
begin to form in the arrays coverage area.  
The following tables show the SPL and coverage areas  
that result from grouping the CQ-1 and CQ-2 in arrays  
of up to four units horizontally and two rows vertically.  
All splay angles refer to the angle between cabinet  
centers. If this information does not address your  
application requirements, contact Meyer Sound to  
obtain additional information on array design.  
NOTE: The trapezoidal shape of the CQ does not  
represent the horizontal coverage area of the speaker  
or the intended splay angle for horizontal arrays. The  
20° angle of the CQ enclosure is narrower than the  
minimum recommended splay angle.  
CQ-1 Array Coverage and Maximum SPL Chart  
Number of Horizontal  
CQ units @ Angle  
1
2 @ 50°  
2 @ 70°  
3 @ 50°  
3 @ 70°  
4 @ 50°  
4 @ 70°  
Coverage Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
Number of Vertical  
Rows of CQ @ Angle  
1
80° 40°  
136  
142  
140  
139  
138  
100° 40°  
100° 20°  
100° 45°  
100° 60°  
100° 80°  
140  
146  
144  
143  
142  
150° 40°  
150° 20°  
150° 45°  
150° 60°  
150° 80°  
139  
145  
143  
142  
141  
170° 40°  
170° 20°  
170° 45°  
170° 60°  
170° 80°  
140  
146  
144  
143  
142  
220° 40°  
220° 20°  
220° 45°  
220° 60°  
220° 80°  
138  
144  
142  
141  
140  
220° 40°  
220° 20°  
220° 45°  
220° 60°  
220° 80°  
141  
147  
145  
144  
143  
300° 40°  
300° 20°  
300° 45°  
300° 60°  
300° 80°  
139  
145  
143  
142  
141  
2 @ 0° (LT) 80° 20°  
2 @ 15°  
2 @ 30°  
2 @ 40°  
80° 45°  
80° 60°  
80° 80°  
CQ-2 Array Coverage and Maximum SPL Chart  
Number of Horizontal  
CQ units @ Angle  
1
2 @ 30°  
2 @ 40°  
3 @ 30°  
3 @ 40°  
4 @ 30°  
4 @ 40°  
Coverage Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak Coverage  
Max Peak  
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
dB SPL  
H
V
Number of Vertical  
Rows of CQ @ Angle  
1
50° 40°  
139  
145  
143  
142  
141  
70° 40°  
70° 20°  
70° 45°  
70° 60°  
70° 80°  
143  
149  
147  
146  
145  
90° 40°  
90° 20°  
90° 45°  
90° 60°  
90° 80°  
142  
148  
146  
145  
144  
100° 40°  
100° 20°  
100° 45°  
100° 60°  
100° 80°  
144  
150  
148  
147  
146  
130° 40°  
130° 20°  
130° 45°  
130° 60°  
130° 80°  
144  
150  
148  
147  
146  
130° 40°  
130° 20°  
130° 45°  
130° 60°  
130° 80°  
145  
151  
149  
148  
147  
170° 40°  
170° 20°  
170° 45°  
170° 60°  
170° 80°  
144  
150  
148  
147  
146  
2 @ 0° (LT) 50° 20°  
2 @ 15°  
2 @ 30°  
2 @ 40°  
50° 45°  
50° 60°  
50° 80°  
14  
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!
Safety Summary  
English  
Français  
To reduce the risk of electric shock, disconnect the loud-  
speaker from the AC mains before installing audio cable.  
Reconnect the power cord only after making all signal  
connections.  
Pour réduire le risque délectrocution, débranchez la  
prise principale de lhaut-parleur, avant dinstaller le  
câble dinterface allant à laudio. Ne rebranchez le bloc  
dalimentation quaprès avoir effectué toutes les  
connections.  
Connect the loudspeaker to a two-pole, three wire ground-  
ing mains receptacle. The receptacle must be connected to a  
fuse or circuit breaker. Connection to any other type of  
receptacle poses a shock hazard and may violate local  
electrical codes.  
Branchez lhaut-parleur dans une prise de courant à 3  
dérivations (deux pôles et la terre). Cette prise doit être  
munie dune protection adéquate (fusible ou coupe-  
circuit). Le branchement dans tout autre genre de prise  
pourrait entraîner un risque délectrocution et peut  
constituer une infraction à la réglementation locale  
concernant les installations électriques.  
Do not install the loudspeaker in wet or humid locations  
without using weather protection equipment from Meyer  
Sound.  
Ne pas installer lhaut-parleur dans un endroit où il y a  
de l’eau ou une humidité excessive.  
Do not allow water or any foreign object to get inside the  
loudspeaker. Do not put objects containing liquid on, or  
near, the unit.  
Ne pas laisser de leau ou tout objet pénétrer dans lhaut-  
parleur. Ne pas placer de r´cipients contenant un liquide  
sur cet appareil, ni à proximité de celui-ci.  
To reduce the risk of overheating the loudspeaker, avoid  
exposing it to direct sunlight. Do not install the unit near  
heat emitting appliances, such as a room heater or stove.  
Pour éviter une surchauffe de lhaut-parleur, conservez-  
la à l’abri du soleil. Ne pas installer à proximité  
dappareils dégageant de la chaleur tels que radiateurs  
ou appareils de chauffage.  
This loudspeaker contains potentially hazardous voltages. Do  
not attempt to disassemble the unit. The unit contains no  
user serviceable parts. Repairs should be performed only by  
factory trained service personnel.  
Ce haut-parleur contient des circuits haute tension  
présentant un danger. Ne jamais essayer de le démonter.  
Il ny a aucun composant qui puisse être réparé par  
l’utilisateur. Toutes les réparations doivent être  
effectuées par du personnel qualifié et agréé par le  
constructeur.  
Deutsch  
Español  
Um die Gefahr eines elektrischen Schlages auf ein  
Minimum zu reduzieren, den Lautsprecher vom  
Stromnetz trennen, bevor ggf. ein Audio-  
Schnittstellensignalkabel angeschlossen wird. Das  
Netzkabel erst nach Herstellung aller  
Para reducir el riesgo de descarga eléctrica, desconecte  
de la red el altoparlante antes de instalar el cable de  
señalización de interfaz de la segnale. Vuelva a conectar  
el conductor flexible de alimentación solamente una vez  
efectuadas todas las interconexiones de señalizatción.  
Signalverbindungen wieder einstecken.  
Conecte el altoparlante a un tomacorriente bipolar y  
trifilar con neutro de puesta a tierra. El tomacorriente  
debe estar conectado a la protección de derivación  
apropiada (ya sea un fusible o un disyuntor). La  
conexión a cualquier otro tipo de tomacorriente puede  
constituir peligro de descarga eléctrica y violar los  
códigos eléctricos locales.  
Der Lautsprecher an eine geerdete zweipolige  
Dreiphasen-Netzsteckdose anschließen. Die Steckdose  
muß mit einem geeigneten Abzweigschutz (Sicherung  
oder Leistungsschalter) verbunden sein. Der Anschluß  
der unterbrechungsfreien Stromversorgung an einen  
anderen Steckdosentyp kann zu Stromschlägen führen  
und gegen die örtlichen Vorschriften verstoßen.  
No instale el altoparlante en lugares donde haya agua o  
humedad excesiva.  
Der Lautsprecher nicht an einem Ort aufstellen, an dem  
sie mit Wasser oder übermäßig hoher Luftfeuchtigkeit in  
Berührung kommen könnte.  
No deje que en el altoparlante entre agua ni ningún  
objeto extraño. No ponga objetos con líquidos encima de  
la unidad ni cerca de ella.  
Darauf achten, daß weder Wasser noch Fremdkörper in  
das Innere den Lautsprecher eindringen. Keine Objekte,  
die Flüssigkeit enthalten, auf oder neben die  
Para reducir el riesgo de sobrecalentamiento, no  
exponga la unidad a los rayos directos del sol ni la  
instale cerca de artefactos que emiten calor, como estufas  
o cocinas.  
unterbrechungsfreie Stromversorgung stellen.  
Um ein Überhitzen dem Lautsprecher zu verhindern,  
das Gerät vor direkter Sonneneinstrahlung fernhalten  
und nicht in der Nähe von wärmeabstrahlenden  
Haushaltsgeräten (z.B. Heizgerät oder Herd) aufstellen.  
Este altoparlante contiene niveles de voltaje peligrosos  
en potencia. No intente desarmar la unidad, pues no  
contiene piezas que puedan ser repardas por el usuario.  
Las reparaciones deben efectuarse únicamente por parte  
del personal de mantenimiento capacitado en la fábrica.  
Im Inneren diesem Lautsprecher herrschen potentiell  
gefährliche Spannungen. Nicht versuchen, das Gerät zu  
öffnen. Es enthält keine vom Benutzer reparierbaren  
Teile. Reparaturen dürfen nur von ausgebildetem  
Kundenienstpersonal durchgeführt werden.  
15  
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Specifications  
Acoustical  
Frequency Response1  
Phase Response1  
Maximum Peak SPL1  
Dynamic Range2  
±4 dB 40 Hz – 18 kHz  
±90° 50 Hz – 16 kHz  
CQ-1: 136 dB ; CQ-2: 139 dB  
> 110 dB  
Coverage  
CQ-1  
–6 dB points  
H: 80° (500 Hz – 16 kHz); V: 40° (1.5 kHz – 12 kHz)  
–10 dB points  
H:100° (500 Hz – 16 kHz); V: 50° (1.5 kHz – 12 kHz)  
CQ-2  
H: 50° (800 Hz – 12 kHz); V: 40° (1.5 kHz – 12 kHz)  
–6 dB points  
H: 60° (800 Hz – 12 kHz); V: 50° (1.5 kHz – 12 kHz)  
–10 dB points  
Transducers  
Low Frequency  
High Frequency  
15” diameter MS-15 cone  
4” diaphragm MS-2001CQ horn compression driver  
Acoustical Crossover Point  
CQ-1  
CQ-2  
700 Hz  
900 Hz  
Amplifiers  
Type  
Burst Capability3  
Complementary power MOSFET output stages class AB/H  
1240 Watts (620 Watts/channel)  
< .02 %  
THD, IM, TIM  
Audio Input  
Type  
10 kimpedance, electronically balanced  
XLR (A-3) male and female  
+4 dBu (1.23 Vrms)  
Connector  
Nominal Input Level  
AC Power  
Connector  
Automatic voltage selection4  
250 V NEMA L6-20P / IEC 309 Twistlock male receptacle  
85 – 134 V / 165 – 264 V; 50 Hz / 60 Hz  
Max Continuous RMS Current (> 10 s) 115 V: 8 A  
230 V: 4 A  
230 V: 8 A  
100 V: 10 A  
100 V: 18 A  
Max Burst RMS Current (< 1 s)  
Max Peak Current During Burst  
Soft Current Turn-on  
115 V: 15 A  
115 V: 22 Apk 230 V: 11 Apk 100 V: 25 Apk  
Inrush current < 12A @115V  
Physical  
Dimensions  
Weight  
21” W x 30” H x 22 12” D  
130 lb (59 kg); shipping: 150 lb (68 kg)  
All birch plywood/black textured  
Enclosure/Finish  
Protective Grill  
Rigging  
Perforated steel grill, charcoal-grey foam  
Four aircraft pan fittings (two on top and bottom).  
Working load for each fitting is 500 lb (15 the cabinet  
breaking strength) with straight tensile pull.  
Notes  
1. Subject to half-space loading; measured  
with one-third octave frequency resolution  
in fixed ISO bands.  
3. Nominal 8 resistive load, pink noise,  
100 V peak.  
4. The unit is rated at 88 – 125 VAC and  
182 – 235 VAC, 50/60 Hz, to satisfy EC  
standards for –10% to 6% AC line voltage.  
2. Measured as the ratio between the peak  
SPL and the A-weighted noise floor.  
Copyright © 1997 Meyer Sound Laboratories, Inc.  
16  
All rights reserved  
Part # 05.041.010.01 Rev A  
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