ARCHITECT'S AND ENGINEER'S SPECIFICATIONS

The electronic frequency dividing module shall be a plug-in type module with 24 user selectable crossover frequencies within the range of 50 to 10,000 Hz. Crossover frequencies shall be chosen to conform to ISO one-third octave centers. The electronic frequency dividing module shall meet the following performance criteria: it shall have a gain of 0 dB and have a frequency response of ~t0.5 dB over a frequency range of 20 to 20,000 Hz, representing a combined output of high pass and low pass sections. Total harmonic distortion and intermodulation distortion shall be less the0.01% from 20 to 20,000 Hz. The unit shall he fully compatible, both physically and electrically, with ALTEC LANSING'S Anniversary Series of power amplifier products.
The electronic frequency dividing module shall conform to the following dimensions: 2.75 in H x 3.58 in W x 1.25 in D, with a weight of 8.5 ounces.
The electronic frequency dividing module shall be the ALTEC LANSING Model 15581A.