Ground
Positive
Remote
UNBAL
BAL
RIGHT
LEFT
J1
J2
200-Ohm
Ground
ISO
J5
BASS OUTPUT
10+ v
7.5 v
5 v
2.5 v
J6
BASS OUTPUT CONTROL JUMPERS
Not all systems are designed the same way, some systems are
designed strictly for SPL while others are for average use. The MB1’s
maximizer circuit can either increase or decrease the signal voltage of
the bass restoration circuit. We recommend that you try the factory
setting before any other since in most systems, the factory setting will
suit you fine. If the factory setting does not suit your system, you may
want to change these jumpers to a higher or lower setting to maximize
the bass output and protect the speakers. Please refer to pages 7 and
8 for both recommended and factory settings.
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. If that is the case, you should go ahead
and change the jumper to the UNBALANCED position.
GROUND ISOLATION JUMPERS
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.
WARNING: Make sure your system is turned off before you alter
these jumpers.
A
5
All specifications are subject to change without notice.
www.earthquakesound.com
MB1 OVERVIEW - INTERNAL
PRE-INSTALLATION PROCEDURE
B
A
C
B
C
(!) DISCONNECT THE NEGATIVE TERMINAL OF YOUR BATTERY
PRIOR TO INSTALLATION
WARNING: Failure to disconnect the negative terminal of your battery prior to
installation may result in sever shock and/or damage to the
components in your system.
