Input and Output Notes
Rockford Fosgate Punch P450.2 amplifier features a removable terminal cover.
It conceals all speaker, signal, remote, power, and ground
connections, as well as the gain and crossover frequency controls for a cleaner
Aluminum Heatsink: The Focused Mass cast aluminum heatsink dissipates heat
generated by the amplifier's circuitry. The inherent advantage of casting
provides a 30% improvement of cooling over conventional extrusion heatsink
INDIGO (INDexed Ideal Gain Operation):
The INDIGO PWM (pulse width modulation) power supply is designed to make the
most of the situation it is presented with. When battery voltage is low, you are
guaranteed to get the power you paid for. When voltage increases, the amp makes
even more power.
Efficiency Heat Sink Application):
MEHSA is a Rockford Fosgate proprietary process that increases the heat transfer
from the MOSFET devices to the heatsink. The multi-layer insulated metal MEHSA
substrate operates with minimal thermal resistance, spreading heat both downward
and outward to quickly dissipate heat from each device across the heatsink. This
allows greater power output, enhanced thermal stability, and maximum
(Tracking Operation Pre-Amplifier Zone):
TOPAZ is a circuit that eliminates noise. The TOPAZ circuit prevents ground
loops by allowing the output impedance of the source unit to determine the
signal ground impedance the amp sees. This virtually assures that the signal
ground out of the head unit and the signal input ground of the amplifier are
identical, eliminating any chance for a ground loop. The result is a 30-40dB improvement of the isolation
between input ground and chassis ground.
(TRANSconductance Active Nodal Amplifier): The trans-ANA is a
circuit that allows the audio signal to pass through the amplifier at low
voltage. The signal is directly level-shifted to the fixed high voltage rails
via a pair of drive transistors. Signal linearity is assured by an active node
formed by the drive transistors at ultrasonic frequencies. The result is
crystal clear sound quality.
NOMAD is an intelligent protection circuit that uses an analog computer to make
real time decisions regarding temperature, voltage, current and impedance. The
unit is protected without limiting sound output unless needed.
(Discrete Surface Mount):
In the manufacturing process high speed robotics are used to place 0% tolerance
resistors and large board traces providing greater reliability and efficiency.
TO-247 MOSFET: The Punch P450.2
utilizes ultra high performance MOSFET output devices, giving the amplifier more
power handling capability as well as lower thermal impedance for more reliable
operation, even under the harshest load conditions.
The amplifier's internal crossover is a 12dB/octave Butterworth filter selectable for
high-pass, all-pass (full range) or low-pass operation variable from 40Hz to
Remote Punch Bass:
The Punch Bass helps correct for acoustical deficiencies in the listening
environment by helping reproduce full range sound without adding excessive
boost. The Punch Bass control has a narrow band adjustment centered at 45Hz,
variable from 0dB to +18dB. The supplied Punch Bass
wired remote can be mounted in a variety of locations. The module's case can be
removed and positioned with the mounting bracket above or below the module. Without the case
the module can be flush
mounted in your vehicle's dash (requires a 2" x 7/8" cutout with
a maximum panel thickness of 3/8"). The wired remote is 2.294" wide, 1.293" tall and
1.509" deep (2.606" including the knob and cable connection). The included cable is
RCA Pass-Thru Jacks:
The pass-thru jacks provide a convenient source for daisy-chaining an additional
amplifier without running an extra set of RCA cables from the front of the
vehicle to the amplifier location. The pass-thru jacks output a full-range
Power Indicator and Protection LEDs:
There are three LEDs on the top of the amplifier. A blue LED illuminates when the unit
is turned on. A yellow Protect LED illuminates if a short circuit or too low an impedance is detected at
the speaker connections. A red Thermal LED illuminates if the amplifier
overheats. The amplifier will automatically shut down if either the yellow or
red LED indicates amplifier trouble.
and Output Notes
Power Connections: The power
and ground terminals are nickel-plated captive c-clamp wire connectors and will
accommodate up to 4-gauge wire. The remote turn-on terminal will accept wire
sizes of 12- to 24-gauge. A Phillips-head or slotted screwdriver (not supplied)
is required to tighten/loosen the terminals.
Speaker Connections: The nickel-plated clamp wire connectors will accept wire sizes of 8- to
18-gauge. A Phillips-head or slotted screwdriver (not supplied) is required to
tighten/loosen the terminals.
Remote Punch Bass Connection: An
RJ-45 jack is provided for connecting the supplied Remote Punch Bass cable.
CEA-2006 Compliance: The
specifications given by Rockford Fosgate for the Punch P450.2 amplifier comply
with the new CEA-2006 Amplifier Power Standard from the CEA (Consumer
Electronics Association). All manufacturers who comply with the standard can
display the CEA-2006 logo on their product.
Certificate: Each amplifier comes with a Performance Verification
Certificate which lists the results of a 10-point performance inspection as well
as a measurement of the actual power output of that amp.
A one year warranty extension, for a total of two years, is provided by Rockford
Fosgate when this amp is wired using a qualifying Rockford Fosgate amplifier
wiring kit. Qualifying wiring kits include the CP4POS CP4CKDS.
The P450.2 has two 30 amp fuses. Like the other amps in the series, one fuse is
under the terminal cover, to the right of the power connections. The second fuse
is under the main circuit board cover.