The low frequency speaker system shall consist of two 15-inch low frequency loudspeakers front-mounted in a heavily braced hardwood-plywood bass-reflex direct-radiating enclosure, and a separate Control Electronics Unit.

The Control Electronics Unit shall contain a power supply capable of operating 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 following criteria: total harmonic distortion 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 1 watt of pink noise, one meter on axis; frequency response, 40 Hz to 100 Hz plus or minus 4 dB measured with 1ž3 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 31.00" W x 21.50" H x 21.50" D with grill frame and foam, weight 115 lbs (52.2 kg).

Control Electronics Unit dimensions are 19.00" W x 1.75" H x 7.75" D, weight 8 lbs (3.6 kg).

The speaker system shall be the Meyer Sound USW-1.

The Control Electronics Unit shall be the Meyer Sound B-2EX.