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Rockford Fosgate Punch 301S

75W x 2 Car Amplifier

Item # 575301S

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Our take on the Rockford Fosgate Punch 301S

The Rockford Fosgate Punch 301S slams your speakers with a one-two combination, so they deliver the high-end musical performance you demand.

The Rockford Fosgate Punch 301S slams your speakers with a one-two combination, so they deliver the high-end musical performance you demand.

Part one: power. The clean circuit design, MOSFET output stages, and proprietary technology inside the 301S bring out extraordinary detail in your music. Drive a pair of coaxial or component speakers with 75 watts RMS per channel, or switch the amp to bridged mode — you'll get a full 300 watts for your favorite subwoofer! Your speakers will benefit from clarity and strength you'll never hear from an in-dash receiver — or a lesser amp.

Part two: control. It takes more than muscle to create a prize-winning car audio system. That's why Rockford Fosgate has decked out the 301S with built-in high- and low-pass crossovers, and a variable Punch bass boost (0-18 dB at 45 Hz). You choose the right settings for your car, your speakers, and your ears.


  • 75 watts RMS x 2 at 4 ohms
  • 150 watts RMS x 2 at 2 ohms
  • 300 watts RMS x 1 bridged output at 4 ohms
  • stereo or bridged mono output
  • 4-ohm stable in bridged mode
  • Tri-way capable (Tri-Way crossover required)
  • requires a 10-gauge wiring kit with a 30-amp fuse — wiring and hardware not included with amplifier
  • variable high- and low-pass crossovers (50-250 Hz at 12 dB/octave)
  • MOSFET power supply and output devices
  • MEHSA mounting technology increases the heat transfer from the MOSFET output devices to the heat sink, for higher power output, lower operating temperatures, and greater reliability
  • TOPAZ — noise-killing differential inputs that eliminate 80% of ground loop noise
  • Trans•ana circuitry keeps preamp voltages low and signal paths simple for outstanding audio quality
  • NOMAD — advanced protection circuitry for "intelligent" shutdown protection
  • variable Punch Bass (0-18 dB boost at 45 Hz)
  • speaker- and preamp-level inputs
  • 11-1/8"W x 2-7/16"H x 9-7/8"D
  • 1-year warranty

What's in the Box:

  • 2-channel amplifier with 2 end caps (already attached) and RF illuminated power logo
  • One 8.5" speaker-level input harness
  • In-line fuse holder with two connection/wire covers (accepts up to 8 gauge wire)
  • 30 Amp ATC fuse
  • Four 7/8" self-tapping screws
  • One 3/32" Allen wrench
  • One 7/64" Allen wrench
  • One 1/8" Allen wrench
  • 7/64" in-set screw
  • 1/8" in-set screws
  • Remote Punch Bass control
  • Remote Punch Bass mounting bracket
  • Two 3/8" self-tapping screws
  • Remote Punch Bass control decal
  • Remote Punch Bass control knob
  • 15' RJ-45 Remote Punch Bass cable
  • Remote turn-on terminal connector
  • Instructions
  • Amp Verification Certificate
  • "Team RF" sticker

Hands-on research

Product Research

Inputs and Outputs


MEHSA (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 reliability.

TOPAZ (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. 

DSM (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.

NOMAD (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.

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.

Internal Crossover: The internal crossover is variable from 50-250 Hz, with a 12dB/octave Butterworth filter. You can choose to use the amplifier in the high pass cross-over mode (HP), all-pass (AP-full range), or low pass mode (LP).

Remote Punch Bass: The Punch Bass feature 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 under your vehicle's dash. The wired remote is 2.317" wide, 1.523" tall and 2.035" deep. The included cable is 15' in length.


Right Side Of Amplifier:

  • Crossover Frequency: variable cross-over point from 50-250 Hz
  • Independent Gain Controls: these variable gain controls allow you to adjust the output level of each channel of the amplifier independently.
  • Crossover Switch: allows you to select HP (high-pass), AP (all-pass), or LP (low-pass) crossover operation

Inputs and Outputs

Left Side Of Amplifier:

  • B+ (power): platinum-plated set-screw terminal (width: 0.183") can accept up to 8 gauge wiring
  • GND (ground): platinum-plated set-screw terminal (width: 0.183") can accept up to 8 gauge wiring
  • REM (remote turn-on): 0.250" quick-slide for remote turn-on lead. Note: A female quick-slide is supplied.

Right Side of Amplifier:

  • Remote Bass Punch Input: RJ-45 connection allows you to remotely adjust the bass boost of this amplifier from the front of the vehicle (variably select from 0dB to 18dB of bass boost centered at 45Hz).
  • Pre-amp Input: platinum-plated RCA jacks for left and right channels
  • High Level Input: Molex plug input for included harness
  • Speaker Outputs: platinum-plated set-screw terminals (width: 0.183") for left and right channels that can accept up to 8 gauge wiring


Dynamic Power Rating (measured at 14.4V):

  • Bridged Into A 4-Ohm Load: 300 watts x 1
  • Per Channel Into A 2-Ohm Load: 150 watts x 2
  • Per Channel Into A 4-Ohm Load: 75 watts x 2


  • Without Endcaps: Height=2.378", Depth=9.855", Width=8.681"
  • With Endcaps: Height=2.378", Depth=9.855", Width=11.089"

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 verify what’s in the box, 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.