Custom Switching Block for Audio Components

Description

Custom Switching Block for Audio Components.
Custom built switching block, designed to couple two separate receivers/amps with three source components into four speakers. The mix and match as you like. Each of the four speakers have independent audio attenuation to control/balance volumes.
Study the photos. It appears to be well built inside and outside. The lettering on the front will scrape off with your fingernail so you can customize it to your specific equipment.
I have not tested this unit. It was an estate sale purchase.