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Guided Tour of The Epicenter (continued)
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 that
event, you should go ahead and change the jumpers to the
UNBALANCED position.
9. Ground Isolation Jumper – Occasionally alternator whine may
appear in a system because the source unit and amplifier may use
different 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 restoration circuit. Depending upon your system, you may
opt to 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 suit you fine. We recommend you
try the factory setting first.
11. PFM Subsonic Filter – The Epicenter Concert Series utilizes a
PFM (Programmable Frequency Match) filter which will help with
speaker control and amplifier power management. To change the
PFM frequency, you need to remove the top of the chassis and
change the modules. Your local AudioControl dealer generally
carries an assortment of these replacement modules. This is
discussed in detail on page EN-14.
EN-11
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