The QTS-2772 high performance switching matrix provides both input and output functions in one package. It allows driving up to 7 input channels of device under test from either of the two output channels of common audio measurement equipment. It also allows connection of 7 output channels of a device under test to either of the two input channels of common audio measurement equipment.

No provision is made for expansion using multiple units. The DUT connections are on the front, the test equipment connections are on the rear, as shown.