OUTPUT INPUT
L L
R R
POWER
PROTECT
6V 0.2V 0dB 10dB 15Hz 35Hz 30Hz 250Hz
LEVEL BASS EQ REMOTE SUBSONIC LOW PASS
POWER INPUT
GND REM BATT+12V
SPEAKER OUTPUT
- - + +
FUSE
6
Basic application
Crossover frequency control checklist:
These sub bass amplifiers can be used in any of the bi-amplification systems described in
LOW PASS: 30Hz to 250Hz
this manual, replacing the 2 channel amplifiers as per the illustrations.
SUBSONIC:15 Hz to 35 Hz
BASS EQ: 0 to +10dB
Interconnect cable checklist:
Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.
Connect the LINE OUT to the inputs of the system highs amplifier.
Level control checklist:
Refer to the section “Setting up systems after installation for best performance”
Use at least #12 gauge speaker wiring. The amps have dual speaker terminals,
simplifying the hookup of multiple speakers. These amps are mono, 1 channel, amplifiers
Minimum final loudspeaker impedance: 1-Ohm.
which have multiple positive and negative connections for ease of wiring. The 2 positives
are the same internally and the 2 negatives are the same internally.
FULL RANGE
STEREO LINE INPUT
NOT USED
Y-ADAPTOR
Note: You can use the Radio/CD designated mono line output or a full range stereo line output.
For full range stereo line output, you will need an optional “Y-Adaptor” as shown.
M1500.1D / M2500.1D / M4000.1D MONO AMPLIFIER APPLICATION
MONO
SUBWOOFER
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY + 12 Volts
VIA FUSE
PARALLEL MONO
SUBWOOFERS
2-OHMS EACH MINIMUM
POWER
SPEAKER
FUSE
GND REM +12V
+ + - -
DESIGNATED
MONO OUTPUT
FROM HEAD UNIT
HFR-4
MIN MAXX
BOOST
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