The JBL 6502 combines an eight-input (six microphone and two line level) mixer with a high power, single-channel amplifier. Simpler to install than a rack-assembled system, the JBL 6502 is ideal for sound systems for auditoriums, gymnasiums, churches, and meeting halls. Each of the six microphone inputs accepts an unbalanced, high-impedance signal. An optional, plug-in transformer will convert an input to balanced low impedance. The line inputs are unbalanced, high impedance, and may be converted to balanced low impedance with accessory plug-in transformers. One of the microphone inputs may be internally switched to RIAA phono characteristics, and a pair of RCA-type jacks on the rear panel permits a stereo source to be fed to this input. Each input has its own level control, and the 6502 also has a master level control and a separate level control for the headphone monitor output. Bass and treble tone controls allow equalization of the program source, and a mixer output ahead of the power amplifier permits connection of an accessory equalizer if desired. The 6502 also has a cue switch that disconnects the mixer output from the amplifier. A meter with switchable range allows visual monitoring. The power amplifier produces 200 W from 20 Hz to 20 kHz with less than 0.2% THD. An accessory output transformer allows full-power operation into 8 or 16 n loads, or into a 70.7 V line.