Architectural and
Engineering Specifications USM-1/S-1
The speaker system, its companion
Control Electronics Unit, and a power
amplifier rated at 600 watts/channel into
8␣ohms shall meet the following perform-
ance criteria: frequency response, 40 Hz to
18 kHz plus or minus 4 dB measured with
1
/
3
rd
octave pink noise at 1 meter on axis;
output of 130 dB SPL one meter on axis
with peaks of 139 dB SPL when driven with
“A”-weighted noise. High frequency dis-
tribution pattern, 70 degrees horizontal by
60 degrees vertical.
Speaker enclosure dimensions are
21" W x 24
1
⁄
4
" H x 18
1
⁄
4
" D, weight 82 lbs
(37.3 kg).
Control Electronics Unit dimensions are
19" W x 1
3
⁄
4
" H 7
3
⁄
4
" D, weight 8 lbs (3.6␣kg).
The speaker system shall be the Meyer
Sound USM-1.
The Control Electronics Unit shall be
the Meyer Sound S-1.
The compact speaker system shall be of
the two-way type, with a 15" low-frequency
loudspeaker front-mounted in a ducted
bass-reflex hardwood plywood enclosure,
a compression driver mounted on a high-
frequency horn which has a 2.0" throat and
4" diameter diaphragm with gap field of
strength of 19k Gauss, and a separate Con-
trol Electronics Unit.
The Control Electronics Unit shall con-
tain a power supply capable of operating
from a 90-125/180-250 VAC, 50/60 Hz line;
electronic crossover circuitry; electronic
delay for the phase alignment of the low-
frequency speaker; low- and high-frequency
protection filters which automatically acti-
vate under high power conditions;
RMS, peak and excursion limiters to pro-
tect the speaker components; equalization
circuitry; active balanced input; and indica-
tor LEDs for power and limiters. Total har-
monic distortion shall be less than 0.1%.
“A”- weighted noise level shall be at least
110 dB below maximum rated output of
+26 dBu.
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
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.
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.
Physical Dimensions
10.50
24.25
21.00
±
.13
10.13 CG
7.25
21.04
31.47
45
°
7.00
2.62
6.50
±
.13
3.50
13.00
18.25
20.25
2.00
(GRILL FRAME
W/FOAM)
2.62
2..25
9.50
2..25
©1994 Meyer Sound
04.151.014.01 B2
