Alphasonik PBD100E, Owner'S Manual

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8.

 Input Grounding:  

For most systems you can 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 change the jumpers to the UNBALANCED position.

9.

 Ground isolation Jumpers:  

Occasionally alternator noise may ap-

pear in a system because the source unit and amplifier may use differ-

ent grounding.  To help in this situation, we have provided alternative 

grounding connections.  Make sure your system is turned OFF before 

you move these jumpers.

10.  

Bass Output Control Jumpers:  

Not all systems are designed 

the same, some systems are designed strictly for SPL (sound pressure 

level) while others are a little more tame.  The Bass Maximizer circuit 

can either increase or decrease the signal voltage of the Bass Resto-

ration Circuit.  Depending upon your system, you may change these 

jumpers to a higher or lower setting to maximize your bass output and 

protect your speakers.  In most systems the factory setting will suite you 

fine.  We recommend you try the factory setting first.