Meyer Sound Speaker USW 1 User Manual

Features  
High power  
Extremely low distortion  
Long-term reliability  
Rugged  
UltraSeries™  
Subwoofer  
Compact and easily handled  
USW-1  
Applications  
Road use or installations  
Sound reinforcement  
Concert, film, and theater  
Live music clubs  
Music playback systems  
Bass instrument amplification  
— 12  
— 9  
— 6  
— 3  
— 0  
Inches  
The compact, high-power USW-1  
extends the frequency range and power  
bandwidth of Meyer Sound reinforcement  
systems to 40Hz. Accurate and rugged,  
the subwoofer consists of two 15-inch  
cone drivers capable of long excursion  
with extremely low distortion, housed  
in a heavily braced five cubic foot vented  
enclosure of multiple-ply hardwood.  
Fitted with handles, the roadworthy  
cabinet has a durable, textured finish and,  
optionally, aircraft-style rigging pan fit-  
tings for ease of installation.  
The USW-1 requires a professional qual-  
ity power amplifier capable of delivering  
up to 400 watts into 4 ohms (this normally  
corresponds to a 250 watt/8 ohm rating),  
with a signal voltage gain of 20 dB (mini-  
mum) to 30 dB (maximum).  
Meyer Sound Laboratories, Inc.  
2832 San Pablo Avenue  
Berkeley, CA 94702  
(510) 486-1166  
FAX (510) 486-8356  
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The B-2EX Control  
Electronic Unit  
6
5
8
4
Safe  
Crossover  
Out  
3
2
1
10  
20  
Excursion  
Power  
Safe  
0
UltraSeries™ B-2EX  
Sense Limit  
Attn dB  
The USW-1 operates as a system with  
the B-2EX Control Electronics Unit (one  
Included in the SpeakerSense circuit  
is a Safe switch, which moves the limit  
per channel). Optimized for use with Meyer point down by 6 dB and engages the  
Sound subwoofers, and pre-aligned at the  
factory, the B-2EX contains frequency  
response and phase response alignment  
circuitry, and Meyer Sounds exclusive  
SpeakerSensedriver protection circuitry,  
incorporating RMS signal limiting and  
switchable excursion limiting.  
excursion limiter. This has the effect of  
increasing the safety margin of the system,  
and is intended to be used when extended  
periods of overload are anticipated. In  
addition to these features, the B-2EX  
incorporates a Crossover switch which  
engages/disengages the lowpass rolloff of  
the subwoofer output. This feature may be  
used whenever it is desireable to operate the  
USW-1 full-range as, for example, in  
instrument amplification  
A single-channel device operating at  
line level, the B-2EX is intended to be the  
final component in the signal chain before  
the power amplifier. It is connected in  
parallel with the input to the system being  
supplemented by the USW-1, and incorpo-  
rates a summing input for deriving a mono  
subwoofer signal from a stereo program.  
The factory-calibrated SpeakerSense  
circuitry protects the USW-1 loudspeaker  
components from damage due to over-  
heating under high power conditions. This  
unique circuit continuously monitors the  
power applied to the USW-1 drivers, and  
limits the B-2EX output when the safe  
operating limits of the drivers are ex-  
ceeded. Until the onset of overload, the  
SpeakerSense circuitry has no effect on the  
B-2EX output signal.  
The setup controls are located behind  
a cover plate on the B-2EX front panel,  
providing a means for securing the system  
installers presets.  
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Architectural and  
Engineering Specifications USW-1/B-2EX  
Meyer Sound Laboratories has  
devoted itself to designing,  
manufacturing, and refining com-  
ponents that deliver superb sonic  
reproduction. Every part of every  
component is designed and built to  
exacting specifications and  
undergoes rigorous, comprehensive  
testing in the laboratories.  
The low frequency speaker system shall  
consist of two 15" low frequency loud-  
speakers front-mounted in a heavily braced  
hardwood-plywood bass-reflex direct-radi-  
ating enclosure, and a separate Control  
Electronics Unit.  
1 watt of pink noise, one meter on axis;  
frequency response, 40 Hz to 100 Hz plus  
or minus 4 dB measured with 13 octave  
pink noise, one meter on axis; output of  
130 dB SPL one meter on axis with peaks  
of 135 dB SPL when driven with weighted  
noise. Total harmonic distortion shall  
be less than 3% at 130 dB SPL one meter  
on axis at 60 Hz.  
Speaker enclosure dimensions are  
31" W x 2112" H x 2112" D with grill frame  
and foam, weight 115 lbs (52.2 kg).  
Control Electronics Unit dimensions  
Research remains an integral,  
driving force behind all production.  
Meyer strives for sound quality that is  
predictable and neutral over an  
extended lifetime and across an  
extended range.  
The Control Electronics Unit shall  
contain a power supply capable of opera-  
ting from a 120/240V AC, 50/60 Hz line, a  
master level control, an active crossover  
set at 95 Hz, an RMS limiter for speaker  
protection, a switchable excursion limiter,  
and two active balanced summing inputs.  
The Control Electronics Unit shall meet the are 19" W x 134" H x 734" D, weight 8 lbs  
following criteria: total harmonic distortion (3.6 kg).  
less than .1%; “A-weighted noise level  
110dB below rated output of +26 dBu.  
The speaker system, its companion  
Control Electronics Unit, and a power  
amplifier rated at 400 watts into 4 ohms  
shall meet the following criteria: pressure  
sensitivity, 101 dB SPL measured with  
The speaker system shall be the Meyer  
Sound USW-1.  
The Control Electronics Unit shall be  
the Meyer Sound B-2EX.  
Sound  
engineering  
for the art  
and science  
of sound.  
Meyer Sound Laboratories, Inc.  
2832 San Pablo Avenue  
Berkeley, CA 94702  
(
510) 486-1166  
FAX (510) 486-8356  
© 1994 Meyer Sound  
04056036.01C2  
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