AXT Systems

ABM-2 Balanced Bypass Module
ABM-2 Module
The ABM-2 module is a relay based true-bypass module for a mono balanced signal and an effects unit. Two variants are documented, one with 5V relays and one with 12V relays. The relay layout accommodates both the NEC signal relay and Omron signal relay as an alternative.

On one side of the module there are connections for the balanced audio connections for the signal in/out and the effects unit in/out. On the other side is the power supply and control switch as well as a terminal for a LED indicator.
A typical arrangement for a mastering setup is shown in the connection diagram. This includes the APRM module for polarity reverse and L/R reverse.