Interspace Industries PC Balance Box

The PCBB3 eliminates hum problems when connecting audio from your presentation PC. It is completely passive and bi-directional.
 
The PC Balance Box is the simplest way to interface unbalanced computer or consumer audio signals to balanced AV sound systems. The inputs and outputs are completely isolated in either direction and by using the ‘Ground Lift’ feature where required, hum problems can be easily cured.