Headphone Amplifiers A&D

The Model 655 Communications Amplifier operates similar to the model 650, but with more features. The dialer has the capability of storing 25 telephone numbers, a low battery light, built in microphone and defeatable ringer for incoming calls. To operate on the telephone line, use the RJ-11 or 3pin XLR jack on the box. The XLR-3 on this model is for all audio input, wet or dry . A 25' telephone cord is included (MAT-2 Part #341). Four thumb screws to remove battery. This box has been updated to work on all types of phone lines.