Meyer Sound Laboratories has
devoted itself to designing,
manufacturing and refining
components 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.

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
The compact speaker system shall be
of the two-way type, with a 12" 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 1.4" throat, and a separate
Control Electronics Unit.
The Control Electronics Unit shall
contain a power supply capable of
operat-ing from a 120/240V AC, 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 activate under high power
conditions, RMS limiters which protect
the speakers from overheating, equaliza-
tion circuitry, active balanced input, and
indicator LEDs for power and limiters.
Total harmonic distortion shall be less
than .1%. “A”- weighted noise level shall
be at least 110dB below maximum rated
output of +26 dBu.
The speaker system, its companion
Control Electronics Unit, and a power
amplifier rated at 250 watts/channel into
8 ohms shall meet the following perform-
ance criteria: frequency response, 70 Hz to
18 kHz plus or minus 4 dB measured with
1/3 octave pink noise at 1 meter on axis;
output of 125 dB SPL one meter on axis
with peaks of 135dB SPL when driven with
“A”-weighted noise. Total mid-band har-
monic distortion shall be less than 1% at
110 dB SPL and 3% at 120 dB SPL one
meter on axis. High frequency distribution
pattern, 45 degrees symmetrical.
Speaker enclosure dimensions are
14" W x 14" H x 22
1
⁄
2
" D, weight 67 lbs
(30.4 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 UM-1C.
The Control Electronics Unit shall be
the Meyer Sound M-1A.
Architectural andEngineering Specifications UM-1C/M-1APhysical Dimensions
©1993 Meyer Sound 04051071.03A
7.5"
14.0"
7.5"
1"
2"
13.0"
15.0"
11.0"
14.44"
52
o
4.13"
22.38"
6.0"
2.2"
2.13"
Connector
(Recessed)
2.63"
18.5"
7.0"
3.18"