Clear-Com TW-12B Encore Intercom System Interface

Used – Acceptable: The item is still functional in that, it still powers on. We are unable to verify any further functionality. Bears signs of wear such as scratches, dents, worn corners, or identifying markings. Parts, accessories, and instructions may be missing. Item is repackaged. SOLD AS IS.

NOTE: Does not include power cord, power supply or any other items not in the photos.

Clear-Com’s TW-12B intercom system interface is designed for connecting one intercom system to another, without compromising the audio quality of either system.

The TW-12B solves all problems that can arise when connecting, for example:

• a mobile production unit’s intercom system to an intercom in a nearby building
• same-type systems located in two different buildings
• to any "unknown" interface, such as a TV camera
• concert hall’s intercom to touring group’s intercom

Transparent Isolation Between Systems

The unique TW-12B completely eliminates hums and buzzes caused byground loops (which occur when you interface two systems that use different power supplies or grounds). The TW-12B compensates not only for level differences between systems, but for varying impedances caused by transformers and capacitance on the lines.

The completely transparent TW-12B provides an electrically isolated interface between the two intercom systems. Either "side" of the interface can connect to a Clear-Com intercom system or an RTS intercom system, allowing Clear-Com-to-Clear-Com, Clear-Com-to-RTS, and RTS-to-RTS combinations. In addition,the TW-12B passes through and translates “call” signals, Clear-Com-to-RTS andvice versa.

The interface consists of two identical, 2-wire-to-4-wire hybrid networks which break the ground loops that occur when two systems are run from separate power sources. The audio paths are transformer-coupled, and the signaling circuits areopto-isolated.