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
(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.
(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
(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.
(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.
INDIGO (INDexed Ideal Gain
Operation): INDIGO is a circuit that maximizes the output power of the
amplifier by making better use of the power supplied by the car. As the battery
voltage drops, INDIGO tightens up so the amplifier delivers the rated power,
resulting in more consistent power coming from the amp.
In-line Fuse: This
amplifier does not have a built-in protection fuse, but comes with a separate
in-line AGU fuse holder and 50-amp AGU fuse. The power wire must be fused within
18" of the vehicle's battery.
Note: Most amplifier wiring
kits will include an in-line fuse holder.
Internal Crossovers: The front
and rear channels have independent crossovers. Each crossover is a 12dB/octave
Butterworth filter selectable for 120Hz high-pass,
all-pass (full range), or 80Hz low-pass operation.
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 LED: The LED power
indicator is located under the RF Power center badge on top of the amplifier.
The center badge illuminates when power is supplied to the amp.
and Outputs Notes
Left Side of Amplifier:
- B+ (Battery Power): set
screw terminal that will accept up to 8-gauge power wire
- GND (Ground): set screw
terminal that will accept up to 8-gauge ground wire
- Speaker Outputs: 4 pairs of
set screw terminals that will accept up to 8-gauge speaker wire
- REM (Remote Turn-on):
0.250" male quick-slide for remote turn-on lead (a female quick-slide
Crossover Slope: The
manual incorrectly lists the slope for the internal crossovers as 24dB/octave.
The internal crossovers actually have a slope of 12dB/octave.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere.
That's because we have our own in-house Product Research team — they open the box,
verify contents, check the owner's manual, and record dimensions, features and specs.
We stay on top of new products and technologies to help people make informed choices.