Meyer Sound Speaker PSW 2 User Manual

Operating Instructions  
PSW-2  
Self-Powered Subwoofer  
Patents Pending  
Copyright © 1997, Meyer Sound Laboratories, Inc.  
All rights reserved  
Part #: 05.047.033.01 Rev A  
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The PSW-2 can withstand continuous voltages up to  
275 V and allows any combination of voltage to GND  
(i.e. Neutral-Hot-GND, Hot-Hot-GND). Continuous  
voltages higher than 275 V may damage the unit.  
Introduction  
The Meyer PSW-2 self-powered subwoofer contains  
independent amplifier and control electronics for two  
15” drivers in a compact enclosure. The PSW-2 has the  
following acoustical specifications:  
The PSW-2 uses a NEMA L6-20P or IEC 309 male power  
inlet and satisfies UL, CSA, and EC safety standards.  
Voltage Requirements  
Frequency Response  
Dynamic Range  
±4 dB 35 – 120 Hz  
> 110 dB  
The PSW-2 operates safely and without audio disconti-  
nuity if theAC voltage stays within either of two operating  
windows: 85–134 V or 165–264 V, at 50 or 60 Hz. After  
applying AC power, the proper operating voltage is  
automatically selected, but the system is muted. During  
the next three seconds, the primary fan turns on, the  
main power supply slowly ramps on, the green Active  
LED on the user panel illuminates, and the system is  
enabled to pass audio signals.  
Phase Response  
±30° 50 – 145 Hz  
The PSW-2 is identical in size to, and matches well with  
the Meyer MSL-4. The PSW-2 also operates efficiently  
with the Meyer MTS-4 or CQ™ Series self-powered  
speakers, and can be used in any system requiring  
additional low frequency power.  
The PSW-2’s integrated design improves durability and  
reliability, eliminates amplifier racks, and simplifies setup  
and installation. The trapezoidal shape facilitates the  
creation of speaker arrays that maximize the coverage  
area for the size of the array. Rigging hardware is provided  
to safely suspend the PSW-2 in elevated installations.  
TROUBLESHOOTING NOTE: If the Active LED does  
not illuminate or the system does not respond to audio  
input after ten seconds, remove AC power. Electronics  
technicians with access to a test bench can contact  
Meyer Sound to receive The Meyer Sound Self-Powered  
Series MP-2 and MP-4 Field Verification Procedure  
(part # 17.022.066.01). This service document contains a  
series of tests to verify that the power supply and ampli-  
fier are functioning properly. Other users should contact  
Meyer Sound or an authorized service center.  
The PSW-2 can be equipped to operate with the Remote  
Monitoring System (RMS) 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.  
If the voltage decreases below the lower bound of either  
operating range (brown-out), the supply uses stored  
energy to continue functioning briefly. The unit turns off  
if the voltage does not increase above the threshold  
before the storage circuits are depleted. The time that the  
PSW-2 continues to operate during brown-out depends  
on how low the voltage drops and the audio source level  
during this period.  
AC Power  
If the voltage fluctuates within either operating range,  
automatic tap selection stabilizes the internal operating  
voltage. This tap selection is instantaneous and there are  
no audible artifacts. If the voltage increases above the  
upper bound of either range, the power supply turns off  
rapidly, preventing damage to the unit.  
When AC power is applied to the PSW-2, the Intelligent  
AC™ supply automatically selects the correct operating  
voltage, allowing the PSW-2 to be used internationally  
without manually setting voltage switches. The Intelligent  
AC supply performs the following protective functions  
to compensate for hostile conditions on the AC mains:  
Ifthe PSW-2shuts down due to either low or high voltage,  
the power supply automatically turns on after three  
seconds if the voltage has returned to either normal  
operating range. If the PSW-2 does not turn back on after  
ten seconds, removeAC power and refer to the TROUBLE-  
SHOOTING NOTE above.  
suppresses high voltage transients up to several  
kilovolts  
filters common mode and deference mode radio  
frequencies (EMI)  
sustains operation during low voltage periods  
provides soft-start power-up, which eliminates  
high inrush current  
NOTE: We recommend that the supply be operated at  
least a few volts away from the upper and lower bounds  
of the operating windows to avoid brown-out and  
possible shut-down.  
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Safety Issues  
Current Requirements  
Pay close attention to these important electrical and  
safety issues.  
The PSW-2 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 (and trip) at varying  
rates, it is essential to understand the types of current  
ratings and how they correspond to circuit breaker  
and cable specifications.  
Use a power cord adapter to drive the PSW-2  
from a standard 3-prong outlet (NEMA 5-15R;  
125 V max).  
The maximum continuous RMS current is the maximum  
RMS current over a duration 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.  
earth  
ground  
chassis  
ground  
The maximum burst RMS current is the maximum RMS  
current over a one second duration. It is used to select  
the rating for most magnetic breakers.  
The PSW-2 requires a grounded outlet. Always  
use a grounding adapter when connecting to  
ungrounded outlets.  
The maximum instantaneous 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  
Vpkdrop = Ip k x Rtotal cable  
Use the table below as a guide to select cables and circuit  
breakerswith appropriateratingsfor your operatingvoltage.  
Do not use a ground-lifting adapter or cut the  
AC cable ground pin.  
PSW-2 Current Ratings  
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  
Keep all liquids away from the PSW-2 to avoid hazards  
from electrical shock.  
Do not operate the unit if the power cables are frayed or  
broken.  
Max. Peak During Burst  
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.  
The minimum electrical service amperage required by a  
system of Meyer speakers is the sum of their maximum  
continuous RMS currents. We recommend allowing an  
additional 30% above the minimum amperage to prevent  
peak voltage drops at the service entry.  
TROUBLESHOOTING NOTE: In the unlikely case that  
the circuit breakers trip (the white center buttons pop  
out), do not reset the breakers! Contact Meyer Sound for  
repair information.  
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A single source can drive multiple PSW-2s with a paral-  
leled input loop, creating an unbuffered hardwired  
loop connection. Make certain that the source equipment  
can drive the total load impedance presented by the paral-  
leled input circuit. For example, since the input impedance  
of a single PSW-2 is 10 k, cascading 20 PSW-2s  
produces a balanced input impedance of 500 . If a 150 Ω  
source is used, the 500 load results in a 2.28 dB loss.  
Power Connector Wiring Conventions  
Use the following AC cable wiring diagram to create  
international or special-purpose power connectors:  
brown = hot  
blue =  
neutral  
yellow/green =  
earth ground  
(chassis)  
Amplification and Protection  
Circuitry  
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:  
Each driver in the PSW-2 is powered by one channel  
of the Meyer MP-2, a 1240 W amplifier (620 W/ channel)  
utilizing complementary power MOSFET output stages  
(class AB/ H). The following sections discuss the MP-2s  
limiting circuitry and the two-fan cooling system.  
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  
green and yellow).  
) or colored green (or  
TruPower™ Limiting System  
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 speaker s voice coil and magnet.  
Conventional limiters begin limiting prematurely, which  
under-utilizes system headroom and deprives the speaker  
of its full dynamic range.  
Audio Input  
The PSW-2 presents a 10 kbalanced input 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  
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 improves performance before and  
during limiting by allowing the speaker to produce its  
maximum SPL across its entire frequency range. TPL  
also extends the lifetime of the drivers by controlling the  
temperature of the voice coil.  
Pin 3 — Signal  
Differential Inputs  
Case — Earth (AC) ground and chassis  
Shorting an input connector pin to the case can  
form a ground loop and cause hum.  
When the safe continuous power level is exceeded, a  
single limiter engages, affecting both amplifier channels  
equally. TPL activity is indicated by the Sub Limit LED  
on the user panel. The limiter ceases operation when the  
power level returns to normal and does not affect the  
signal when the LED is inactive.  
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.  
TROUBLESHOOTING NOTE: If abnormal noise (hum,  
hiss, popping) is produced from the loudspeaker, dis-  
connect the audio source from the speaker. If the noise  
stops, then the problem is not within the loudspeaker;  
check the audio input and AC power.  
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The PSW-2 performs within its acoustical specifications A foam insert filter, in combination with the entire front  
and operates at a normal temperature if the TPL LED is grill surface, acts as an air filter for the cooling system.  
on for no longer than two seconds, and off for at least Despite the filtering, extensive use or a dusty operating  
one second. If the LED remains on for longer than three environment can allow dust to accumulate along the  
seconds, the PSW-2 is hard limiting with these negative path of the airflow, preventing normal cooling. We  
consequences:  
recommend periodically removing the grill, filter, and  
amplifier module and using a vacuum cleaner to clear  
dust from the grill, filter, fans, and heatsinks. Make sure  
that the air ducts are clear and that there is at least six  
inches clearance for exhaust behind the cabinet.  
Increasing the input level will not increase the  
volume.  
The system distorts due to clipping and nonlinear  
driver operation.  
cooling  
fans  
The life-span of driver and amplifier components is  
reduced because they are subjected to excessive  
heat.  
The TPL LED can indicate an imbalance in a system of  
speakers by functioning like a spectrum analyzer. If  
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.  
air  
power  
supply  
heatsinks  
air  
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.  
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.  
Driver Excursion Clamp  
The drivers in the PSW-2 are protected from over-  
excursion by an excursion clamping circuit that does  
not have attack or release time constants. The circuit  
provides instantaneous braking for the drivers without  
the pumping effects commonly produced by compressor/  
limiters.  
In the unusualevent that the heatsink temperature reaches  
74°C, the secondary fan turns on; it turns off when the  
temperature decreases to 68°C. The secondary fan is  
audible at close proximity without an audio signal and  
turns on in response to  
primary fan failure (check its status immediately);  
accumulation of dust in the cooling system path;  
The circuit uses sophisticated filters to minimize the  
distortion normally caused by clamping and clipping.  
As the PSW-2’s input signal is increased past the  
clamping point, the output signal remains at a fixed  
level, protecting the drivers and minimizing negative  
sonic effects. The PSW-2 operates safely if the Exc. Clamp  
LED is on for no longer than two seconds, and off for at  
least one second.  
a prolonged period of high source levels in hot  
temperatures or direct sunlight;  
driver failure.  
TROUBLESHOOTING NOTE:In the highly unlikely event  
that the secondary fan does not keep the temperature  
below 85°C, the PSW-2 automatically shuts down until  
AC power is removed and reapplied. If the PSW-2 shuts  
down again after cooling and reapplying AC power,  
contact Meyer Sound for repair information.  
Fans and Cooling System  
The PSW-2 uses a forced-air cooling system with two  
fans to prevent the amplifiers from overheating. 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.  
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Rigging  
Configuration, Placement,  
and Polarity  
The PSW-2 weighs 162 lb (73.5 kg). The maximum rec-  
ommended load for a single cabinet with aircraft pan  
fittings is 600 lb (273kg). This working load is based on a  
5:1 safety factor. The PSW-2 has six rigging brackets  
(three on top and bottom). Each bracket is capable of  
supporting the full working load of the cabinet.  
Designing a full-range system requires an understanding  
of how subwoofers respond when grouped together,  
how they interact with nearby walls and floors, and how  
their location in a system affects the choice ofpolarity to use  
for other speakers. These topics are introduced as back-  
ground for the section Full-Range Systems.  
There are four types of interchangeable rigging brackets,  
each fastened by six Phillips screws:  
Configuration  
aircraft pan fittings (ring and stud)  
3/ 8”-16 nut plates  
A single subwoofer has an essentially omnidirectional  
coverage pattern. A horizontal line with two adjacent  
subs narrows the horizontal coverage area, without  
changing the vertical coverage, compared to one sub. A  
vertical stack of two subs narrows the vertical coverage  
without changing the horizontal coverage. In both cases,  
there is 3 to 6 dB SPL of on-axis addition.  
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.  
Increasing the size of the horizontal or vertical array  
from two to three subs further narrows the respective H  
or V coverage without changing the corresponding V or  
H coverage. Both the vertical and horizontal three-sub  
arrays provide approximately 10 dB SPL addition more  
than one sub.  
rigging brackets  
three on top, three on bottom  
Increasing the number of subs in the horizontal or vertical  
array increases the corresponding H or V directional  
control and the system SPL. A properly designed vertical  
array steers low frequencies to include balconies and  
upper tiers but avoids unnecessary interaction with the  
ceiling; a horizontal array focuses low frequencies for  
the longer throw distances required by large venues.  
Handles are for carrying only.  
Do not use them for rigging!  
!
Rigging load ratings assume a straight tensile pull and  
that the cabinet is in new condition with aircraft pan  
fittings. If the preceding conditions are not met, or the  
rigging is worn or damaged, the load ratings can be  
reduced significantly. Inspect the rigging hardware  
regularly and replace worn or damaged components  
immediately.  
The three-by-two array (below left) narrows the H and V  
coverages, and produces 10 to 15 dB SPL more than a  
single sub. Combining the vertical and horizontal arrays  
in an L-configuration (below right)provides more on-axis  
SPL and directional control than the three-by-two array.  
The cabinet, exposed electronic circuitry, and drivers can  
receive protective treatment that permits safe use in wet  
conditions. Additionally, a rain hood can be fitted to  
shield cables and electronics. Do not install a unit outdoors  
without weather protection!Contact Meyer Sound for more  
information.  
NOTE: All Meyer Sound products must be used in accor-  
dance 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.  
Both the three-by-two group and L-configuration increase  
the SPL and directional control.  
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We recommend using the Meyer LD-1A Line Driver to  
integrate different types of Meyer self-powered speakers  
Placement  
One of the most important factors governing subwoofer into a complete system. The LD-1A has two channels  
response is their placement relative to adjacent surfaces. equipped to control a full-range main system, and six  
Subwoofers gain significant power by coupling, or loading, auxiliary channels for down-fill, front-fill, and delay  
with nearby floors and walls. Half-space loading describes systems. The LD-1A maintains signal integrity for long  
a speaker coupling with one surface. Subs placed on cable paths and provides the following useful functions:  
the floor benefit from half-space loading, while flown  
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.  
subs in free-space (without a nearby wall or ceiling) do  
not. In general, subs in half-space generate twice the  
SPL (+6 dB) compared to the same number in free-space.  
The DS-2 & Sub Crossover switch (channels 1 and  
2 only) activates a crossover network optimized  
for the DS-2P when used with the PSW-2 or 650-P.  
With the switch in, frequencies below 80 Hz are  
sent to the Sub output (for the 650-P), and above  
80 Hz to the DS-2 output. When the subwoofer is  
used without the DS-2P, the switch should be out,  
which sends a full-range signal to both the DS-2  
and Sub outputs.  
It can be beneficial to fly subwoofers, despite the lack of  
half-space loading. Placing subwoofers within a flown  
cluster of mid-hi speakers creates a smooth frequency  
image because the subs are not separated by the distance  
from the cluster to the floor.  
NOTE: SPL values refer to an on-axis measurement  
position. The actual SPL addition and narrowing of  
coverage varies with frequency and depends on the  
distance between cabinets, loading conditions, and  
room acoustics.  
The DS-2 φ and Sub φ switches (channels 1 and 2  
only) toggle the polarity for the DS-2 and Sub  
outputs.  
Polarity  
The Mid-Hi, DS-2, and Sub outputs (channels 1  
and 2 only) each have their own gain control and  
mute switch.  
The cabinets in the Full-Range Systems section are in a  
close-proximity coplanar orientation, unless otherwise  
stated. Separating a mid-hi speaker from a subwoofer  
by more than 5 ft may require setting the speakers to  
opposite polarities to compensate for the propagation  
delay from each speaker to the designated listening or  
measurement position.  
POLARITY NOTE: The polarity for Meyer self-powered  
speakers may be reversed using the input polarity switch  
on the user panel. The LD-1A also allows polarity reversal  
with the DS-2 φ and Sub φ switches for speakers  
connected to the DS-2 and Sub outputs. When making  
polarity decisions in applications that include the LD-1A,  
check the state of all polarity switches.  
In a coplanar orientation, externally amplified Meyer  
subwoofers require the opposite polarity setting to all  
Meyer self-powered speakers.  
Full-Range Systems  
Measurement and System  
Integration Tools  
Meyer Speaker Types  
The following Meyer speakers are mentioned in the  
example applications.  
It is essential that even the most carefully assembled  
sound systems be analyzed with precise measurement  
tools. We recommend using the Meyer SIM® System II  
Sound Analyzer and CP-10 Parametric Equalizer to  
MSL-4 Self-powered mid-hi speaker  
CQ Series Self-powered mid-hi speaker  
MTS-4 Self-powered full-range speaker  
650-P Self-powered subwoofer  
assist the process of choosing and configuring  
speakers;  
USW-1 Externally amplified subwoofer  
measure propagation delays between subsystems  
to set the correct polarity and delay times;  
The Meyer self-powered speakers listed above have a  
loop connection to send the input signal to another  
speaker. Full-range signals may be applied to all Meyer  
self-powered subwoofers because they have built-in  
active crossovers that filter mid-hi frequencies.  
measure and equalize variations in frequency  
response caused by the acoustical environment  
and the placement and interaction of speakers.  
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The CH 1 Mid-Hi output drives the MSL-4 with the Lo  
Cut filter in. The CH 1 Sub and DS-2 outputs drive the  
650-Ps and PSW-2s with the DS-2 & Sub Crossover  
switch out, which sends a full-range signal with inde-  
pendent level control to each speaker.  
PSW-2 and MSL-4  
The PSW-2 is compatible with the MSL-4, CQ, and MTS-4.  
However, since the LF (low frequency) response for each  
speaker overlaps with the PSW-2, the system frequency  
response exhibits a rise in the range 65– 120 Hz (MSL-4),  
40–120 Hz (CQ), and 30–120 Hz (MTS-4). 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.  
MSL-4 and  
PSW-2  
flown in  
same cluster  
CH 1 Mid-Hi  
LD-1A  
Line Driver  
CH 1 Input  
CH 1 DS-2  
CH 1 Sub  
MSL-4  
PSW-2  
input  
loop  
CP-10 EQ  
(1 Channel)  
650-P  
subwoofer  
on the floor  
Set the MSL-4 and PSW-2 to the same polarity. The polarity  
for the 650-P depends on the distance of the measurement  
position relative to the subwoofers and the flown cluster.  
Set the MSL-4 and PSW-2 to the same polarity.  
LD-1A with PSW-2 and MSL-4  
PSW-2 and USW-1  
Activating the Lo Cut filter on the LD-1A for the CH 1  
Mid-Hi output also eliminates the LF rise caused by the  
overlap between the MSL-4 and PSW-2. Although a  
typical MSL-4 : PSW-2 ratio is 2:1, CH 1’s Sub and Mid-  
Hi level controls allow the ratio to vary while maintain-  
ing control of the spectral balance of the system.  
Although it is preferable to employ the PSW-2 in a  
completely self-powered system, the PSW-2 can be used  
with the USW-1 externally amplified subwoofer if:  
the B-2EX CEU is set to the maximum output  
level;  
the USW-1’s amplifier is set to 26 dB gain;  
the PSW-2 is set to the opposite polarity to the  
USW-1 amplifier.  
MSL-4  
CH 1 Mid-Hi  
LD-1A  
CH 1 Input  
Line Driver  
CP-10 EQ  
PSW-2  
PSW-2  
CH 1 Sub  
Set the MSL-4 and PSW-2 to the same polarity.  
B-2EX  
CEU  
Amplifier  
USW-1  
LD-1A with Flown PSW-2 and MSL-4;  
650-P on the Floor  
level control 26 dB gain  
at maximum  
Including subwoofers in a flown cluster provides a smooth  
frequency image because the low and mid-hi frequencies  
are produced from speakers located close together. The  
identical dimensions of the PSW-2 and MSL-4 allow them  
to be easily flown together.  
Set the PSW-2 to the opposite polarity to the USW-1  
amplifier.  
POLARITY NOTE: It is advisable to check the polarity of  
adjacent PSW-2 and USW-1 cabinets by following the  
instructions in the Verifying Driver Polarity section on  
page 10.  
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Driver Polarity in the Same Loudspeaker  
Driver Troubleshooting  
A cabinet with two identical drivers receiving the same  
input signal produces an extremely low amplitude output  
signal if the polarity of the drivers is reversed. Use the  
following test procedure to verify the polarity between  
drivers in the same loudspeaker:  
The Remote Monitoring System (RMS)is the best method  
to query the status of the drivers in a system before and  
during the performance. RMS monitors peak power,  
peak voltage, and average voltage (VU) for each amplifier  
channel, allowing immediate detection and muting for  
drivers with open or shorted voice coils, with minimal  
disruption to the system. Contact Meyer Sound for more  
information about RMS.  
1. Place a measurement microphone 3 ft from the  
front of a loudspeaker that is known to be wired  
correctly, at the mid-point between the two drivers.  
2. Connect a signal source to the loudspeaker and  
note the frequency response and overall level.  
In the absence of RMS, several methods can be employed  
to obtain information about the state of the drivers.  
3. Place a measurement microphone 3 ft from the  
front of the loudspeaker with unknown polarity,  
at the mid-point between the two drivers.  
Troubleshooting with TPL  
4. Connect a signal source to the loudspeaker and  
note the frequency response and overall level.  
The TPL LED can indicate serious driver problems, if  
interpreted correctly. If one PSW-2 in a system exhibits  
substantially more TPL activity than others receiving  
the same audio signal, then one or both drivers in that  
unit may have a short circuit. This is a potentially  
dangerous condition for the electronics; shut the PSW-2  
down immediately.  
This driver is180° out of phase  
The TPL circuit does not activate if there is no power  
dissipation in the driver, regardless of the input signal  
level. Therefore, if all PSW-2s 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.  
Drivers with correct  
polarity cause acoustic  
addition  
Drivers with reverse  
polarity cause acoustic  
cancellation  
The polarity is correct if the frequency response  
remains constant for both tests, with the same overall  
level. Broadband cancellation (decreased overall level)  
for the cabinet being tested indicates polarity reversal.  
Driver Replacement  
To determine whether a driver is functioning properly,  
or replace a damaged driver, contact Meyer Sound to  
obtain the Low Driver Inspection and Evaluation  
Procedure for Self-Powered Series Products (part #  
17.010.120.01).  
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 3 ft from the  
speakers on the axis between them.  
Verifying Driver Polarity  
3. Connect a signal source to one speaker and note the  
frequency response and overall level.  
Incorrect driver polarity impairs system performance  
and may damage the drivers. All Meyer loudspeakers  
are shipped with the drivers in correct alignment. How-  
ever, if the driver or circuit wiring has been removed or  
disassembled in any loudspeaker in a system for any  
reason, it is essential to check the polarity between  
drivers in the same cabinet and between adjacent loud-  
speakers.  
4. Apply the same signal to the second speaker with  
the first speaker still connected.  
The polarity is correct if the frequency response remains  
constant with a significant increase in amplitude. Broad-  
band cancellation indicates polarity reversal.  
NOTE: Checking the polarity of more than two adjacent  
cabinets in one test may damage the drivers in the  
cabinet with reversed polarity.  
NOTE: Since polarity reversal causes excessive driver  
excursion at high source levels, use moderate levels for  
these tests.  
10  
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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, débrancher la  
prise principale de lhaut-parleur, avant dinstaller le  
câble dinterface allant à laudio. Ne rebrancher 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, conserver-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 volt-  
ages. 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 dieGefahr eineselektrischen Schlagesaufein Minimum  
zu reduzieren, den Lautsprecher vom Stromnetz trennen,  
bevor ggf. ein Au d io-Schnittstellensignalkabel  
angeschlossen wird. Das Netzkabel erst nach Herstellung  
aller Signalverbindungen wieder einstecken.  
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.  
Der Lautsprecher an einegeerdetezweipoligeDreiphasen-  
Netzsteckdose anschließen.Die Steckdose muß mit einem  
Conecte elaltoparlante 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.  
geeigneten  
Abzw eigschu tz (Sicheru ng od er  
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,  
d ie Flü ssigkeit enthalten, au f od er neben d ie  
unterbrechungsfreie Stromversorgung stellen.  
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.  
Um ein Überhitzen dem Lautsprecher zu verhindern, das  
Gerät vor direkter Sonneneinstrahlung fernhalten und  
nicht in d er N ähe von w ärm eabstrahlend en  
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.  
Rep aratu ren d ü rfen nu r von au sgebild etem  
Kundenienstpersonal durchgeführt werden.  
11  
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Controls and Connectors  
!
WARNINGS:  
THIS PRODUCT MUST BE GROUNDED  
This surface may reach high temperatures while in use.  
To ensure proper operation, allow at least inches  
6
Mains AC inlet  
clearance from this surface and adequate ventilation.  
To reduce the risk of electric shock do not remove cover.  
No operator serviceable parts inside.  
Mains circuit  
breakers  
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  
ATENCIÓN  
:
ACCESO INTERNO SOLO  
AUTORIZADO  
A
PERSONAL TÉCNICO CALIFICADO  
PSW-2  
ACHTUNG  
:
GEHÄUSE NICHT ÖFFNEN WARTUNG  
UND REPARATUR NUR DURCH ELEKTROFACHKRÄFTE  
Driver Excursion Clamp  
Sub Limit (red)  
Exc. Clamp  
SUB Limit  
ATTENTION ENTRETIEN ET REPARATIONS  
:
INTERNES NE SONT AUTORISEES QU'AU  
PERSONNEL TECHNIQUE QUALIFIÉ  
Active  
/
Speaker Fault  
UK WARNING: THIS APPARATUS MUST BE EARTHED.  
NO OPERATOR SERVICEABLE PARTS INSIDE.  
REFER SERVICING TO QUALIFIED PERSONNEL  
THIS PRODUCT MUST BE GROUNDED  
Input Polarity  
PUSH  
Power LED (green/red)  
Input polarity switch  
2
3
+
+
!
10K  
Balanced  
Auto-Voltage Select  
WARNINGS:  
This surface may reach high tea  
95-125V  
50-60Hz  
~
208-235V~  
50-60Hz  
To ensure proper operation, all
1400W RMS MAX 1400W RMS MAX  
clearance from this surface and q  
To reduce the risk of electric sh
No operator serviceable parts i
qualified personnel.  
1
ESD  
220K  
Case  
2
2
1
1
To reduce the risk of fire or elec
this appliance to rain or moistu
3
3
Earth / Chassis  
Signal input and  
loop connectors  
ATENCIÓN: ACCESO INTEO  
Network  
A
PERSONAL TÉCNICO CALIA  
Input  
Loop  
ACHTUNG: GEHÄUSE NI
WARTUNG UND REPARATU
ELEKTROFACHKRÄFTE  
Remote Monitoring  
System panel  
(if RMS is installed)  
ATTENTION: ENTRETIEN  
INTERNES NE SONT AUTORI
TECHNIQUE QUALIFIÉ  
Meyer Sound, Berkeley, CA. USA  
Remote Monitoring System  
UK WARNING: THIS APPT  
NO OPERATOR SERVICEABLE T  
SERVICING TO QUALIFIED PERN  
y  
in  
Auto-Voltage e  
8A RMS  
20A Peak  
2
3
1
+
~
+
95-125  
50-60Hz  
PUSH  
700W RMS
Rear User Panel shown with the optional  
Remote Monitoring System (RMS) panel  
E
E
ssis  
ssis  
2
1
2
1
3
3
Made by:Meyer Sound,Berkeley,Ca. U.S.A.  
European Office:  
Meyer Sound Europe  
14, Long Barn Lane,  
Reading, Berkshire,  
England RG2 7SZ  
Meyer Sou
ISTED  
U
® L  
3K59  
C
MMERCIAL  
O SYSTEM  
Loop  
Input  
European User Panel with  
IEC 309 connector  
Dimensions  
All units in inches  
Front  
Side  
Top  
30.0"  
13.0"  
21.25"  
22.0"  
10.6"  
21.25"  
13.2"  
36.0"  
13.4"  
14.0"  
30.3"  
5.5"  
7.5°  
Contact Information  
Meyer Sound Germany  
Gmbh  
Meyer Sound Laboratories, Inc.  
2832 San Pablo Avenue  
Carl Zeiss Strasse 13  
56751 Polch, Germany  
Telephone: 49.2654.9600.58  
Berkeley, California 94702  
Telephone:510 - 486 - 1166  
FAX:  
510 - 486 - 8356  
FAX:  
49.2654.9600.59  
12  
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