Each input has its own volumn control; treble and bass controls are included to adjust the tonal balance of the output. The Tel channel includes a screwdriver adjustable volume control on the rear panel.
Balanced and unbalanced outputs are provided for 4Ohm, 8Ohm, and 16Ohm speaker systems and for 25 volt and 70 volt constant voltage systems. Output jacks permit patching in a tape recorder or an additional booster amplifier, or feeding a 500/600Ohm telephone line when an accessory transformer is used.
The Classic Series is designed with all silicon semiconductors and advanced complimentary transistor circuitry to assure highest reliability. Thermal and electrical protection is built in and is designed to protect the amplifier against abnormal heat build-up and short circuited or overloaded outputs.