Filter
Top Products
The Punch 4-Channel amplifiers feature selectable elec-
tronic crossovers. Selection is made by positioning of a
removable module card. These modules control the
output channels and can be configured in a High Pass,
Low Pass or Full Range (factory default) position. The 4-
Channel amplifiers are shipped with 100Hz 12dB per
octave Butterworth aligned crossover modules. Addi-
tional crossover frequency modules are available from
your Authorized Rockford Fosgate Dealer.
Active
Crossover
Mode
Selection
17
LP
➞
HP
➞
Note: The factory default is Full Range.
To change the crossover mode, remove the crossover
module from the housing. Rotate the module to the
desired setting and gently push the module back into the
amplifier housing as shown on the diagram on the back
of the amplifier.
Crossover
Frequency
Settings
NOTE:
All of the crossover cards in this amplifier have been
factory installed in the FULL RANGE configuration.
They can be reconfigured to produce a 100Hz LOW
PASS or HIGH PASS according to the following
instructions.
CROSSOVER CARD INSTALLATION:
Use a small screwdriver to pry out the plastic hole
covers. Orient the card in the FULL RANGE, LOW
PASS, or HIGH PASS configuration as shown below,
then insert the card fully into the connector.
FRONT+REAR
SUM OUTPUT
FRONT
SPEAKERS
REAR
SPEAKERS
FULL RANGE LOW PASS HIGH PASS
FULL
LP
HP
HP
LP
➝
➝
➝
➝
➝
➝
FRONT+REAR SUM OUTPUT:
The center pair of RCA jacks provide a
FRONT+REAR summed output signal, with a
crossover that operates independently of the FRONT
SPEAKER and REAR SPEAKER crossovers.
Example: The 4040 DSM is shipped with three 100 Hz
modules. With the modules in the Full Range setting, the
amplifier will pass through all 20Hz -20kHz frequencies.
In the Low Pass setting, only those frequencies below
100 Hz will pass through the amplifier.
In the High Pass setting, only those above 100 Hz will
pass through the amplifier.