The compact speaker system shall be of the two-way type, with a 12-inch 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-inch 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, equalization 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 performance 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 harmonic 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 22.5" D, weight 67 lbs (30.4 kg).

Control Electronics Unit dimensions are 19" W x 1.75" H 7.75" 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.