Cerwin-Vega Vega Series User Manual page 5

Functions
9. INPUT GROUNDING:
In most systems, the source unit may leave this jumper set in the BALANCED position. In some
systems, the source unit may look for a ground through the RCA connectors. In this event, you should go ahead
and the change the jumpers to the UNBALANCED position.
10. GROUND ISOLATION JUMPERS:
Occasionally alternator whine may appear in a system because the source unit and amplifier may use
different grounding. To help this situation, we have provided alternattive grounding connections. Make sure your
system is turned OFF before you move these jumpers
11. BASS OUTOUT CONTROL JUMPERS:
Not all systems are designed the same, more systems are designed strictly for SPL (sound pressure
level) while others are a little more same, The Bass Maximizer circuit can either increase or decrease the signal
voltage of the Bass Restoration Circuit. Depending upon your system, you may opt to change these jumpers to a
higher or a lower setting to maximmize your bass output and protect your speakers. In most systems, the factory
setting will suit you fine. We recommend you try the factory setting first.