Inputs and Outputs Notes
Aluminum Heatsink: The 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
(Maximum 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
simply eliminates noise. The TOPAZ circuit allows the amplifier ground to move
with the source unit ground, creating a "noise elimination" zone just before the
preamp section. If there is any noise in the ground coming down the RCA line to
the amplifier, TOPAZ amazingly tracks it down and eliminates it. The result is a
30-40dB improvement of the isolation between input ground and chassis ground.
Trans-ANA (TRANSconductance Active Nodal Amplifier): 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.
(NOn-Multiplying Advanced Decision): 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.
TO-247 MOSFET: The Punch P450.4
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.
2/4-Channel Switch: The P450.4
can be switched from a 4-channel mode to a 2-channel mode by pressing in the
2/4-channel switch. When operating in the 2-channel mode, the amplifier produces
4-channels of output with connections to only the front channel inputs.
Internal Crossovers: The
amplifier's internal front and rear crossovers are 12dB/octave Butterworth
filters, independently selectable for high-pass, all-pass (full range), or
low-pass operation. Each crossover is variable from 40Hz to 400Hz.
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. Using the mounting bracket, the supplied Punch Bass wired remote can be
mounted in any convenient location. The module's case can be configured with the
bracket above or below the module, or, without the case, mounted flush in your
vehicle's dash (requires a 2" x 7/8" cutout with a maximum thickness of 3/8").
The wired remote is 2.292" wide, 1.194" tall and 1.502" deep (2.433" including
the knob and cable connection). The included cable is 16.25' in length.
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 and Protection LEDs: A
yellow "Protect" LED, located on top of the amplifier, illuminates if a short
circuit or too low of an impedance is detected at the speaker connections. A red
"Thermal" LED illuminates if the amplifier overheats. A blue "Power" LED
illuminates when the amplifier is turned on.
Inputs and Outputs 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
4-channel 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.