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Compact and surprisingly powerful — delivers clear, dynamic sound and easy installation in tight locations like under seats or behind head units.
Buyer confidence
88%Highlights
- Full Range Class-D
- Selectable Fixed 12dB/Octave Butterworth Crossovers
- Rockford Fosgate proprietary protection
- Compact design for stealth installations
Key specs
Full specs- Number of Channels
- 4
- Total Power (Sum of Rated Power)
- 400 Watts
- Rated Power (RMS Continuous Power)
- 50 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 75 Watts x 4 @ 4-Ohm 130 Watts x 4 @ 2-Ohm 270 Watts x 2 @ 4-Ohm Bridged
- Bridgeable
- Yes
- Frequency Response
- 20Hz - 20kHz +/- 1dB
- Input Sensitivity
- 150 mV to 12 V
- Circuit Topology Class
- Class D
Key specs
Full specs- Number of Channels
- 4
- Total Power (Sum of Rated Power)
- 400 Watts
- Rated Power (RMS Continuous Power)
- 50 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 75 Watts x 4 @ 4-Ohm 130 Watts x 4 @ 2-Ohm 270 Watts x 2 @ 4-Ohm Bridged
Highlights
Overview- Full Range Class-D
- Selectable Fixed 12dB/Octave Butterworth Crossovers
- Rockford Fosgate proprietary protection
Review highlights
Based on customer reviewsSmall, punchy 4‑channel amp that fits tight spaces
Compact and surprisingly powerful — delivers clear, dynamic sound and easy installation in tight locations like under seats or behind head units.
What buyers praise
- Very compact — fits under seats, behind head units, and in motorcycle fairings
- Surprisingly powerful for its size; provides solid headroom and punch
What to watch for
- No detailed printed manual included — plan to download setup tracks/guide online
Overview
Compact 400 Watt full-range 4-channel Class-D amplifier featuring Rockford Fosgate's Boosted Rail Technology for efficient power in small installations.
Best for
- Compact car audio systems
- Front/rear stereo systems
- Motorsports and motorcycle applications (Element Ready)
- Small vehicles such as trucks, sub-compacts, electric and hybrid vehicles; also suitable for UTVs and boats
Key points
- 400 Watt full-range output in a 4-channel configuration
- Full Range Class-D topology for efficient power delivery
- Boosted Rail Technology (BRT) for high efficiency and reduced current draw
- Variable hi-level DC offset turn-on for easier integration with OEM systems
- CEA-2006 (amplifier) compliant
- Element Ready design options for motorsports and motorcycle use
Fit and use
Designed for stereo front/rear systems where space and electrical capacity are limited. The compact footprint suits installations in tight locations; the variable hi-level turn-on simplifies connection to factory head units. Use this amplifier where efficient, full-range power is required without large, heavy components.
What to know
This amplifier is engineered for efficiency but will still require appropriate power and grounding; consult the owner's manual for exact power ratings, wiring requirements, and installation guidance. CEA-2006 referencing indicates standardized amplifier measurement. For system-specific fitment, wiring details, or conf…
Highlights
Key features
- Full Range Class-D
- Selectable Fixed 12dB/Octave Butterworth Crossovers
- Rockford Fosgate proprietary protection
- Compact design for stealth installations
- 1 Year Warranty
- CEA-2006 and CE compliant
- Real time output and power supply thermal sensing
- Differential inputs with high level auto turn-on feature
- 8 AWG power/ground connector
- Remote-Out feature when using high level inputs
- Discrete surface mount technology
- C.L.E.A.N. input/output clip detection and indicator LEDs
More info
Manufacturer details
The Punch PBR400X4D is a 400 Watt full-range car audio amplifier designed for compact systems. This efficient amp packs a Punch in truck, sub-compact, electric, and hybrid vehicles without sucking a lot of juice from your electrical system.
See our Element Ready™ amplifiers designed specifically for Motorsports and Motorcycle applications.
Additional details
The Rockford PBR400X4D is a full-range 4-channel car audio amplifier designed for stereo front/rear systems that requires little space. The BRT (Boosted Rail Technology) is an ultra efficient design that generates 400 Watts of power! The BRT also has a variable hi-level DC offset turn-on circuit for easy installation into any OEM system.
See our Element Ready™ amplifiers designed specifically for Motorsports and Motorcycle applications.
Technologies
CEA-2006 (amplifier)
Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your
Full Range Class-D
A full-range version of the Class-D topology which is a high efficiency amplifier design that reduces current
MEHSA3
MEHSA3 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs the output device life
DSM
DSM - An industry-leading manufacturing process, DSM utilizes high-speed robotics, high-quality 1% tight-tolerance
Engineered In The USA
[av• uh•tahr -noun] 1. an embodiment or personification, as of a principle, attitude, or view of life 2. a
Specs
Specifications
29
| Number of Channels | 4 |
| Total Power (Sum of Rated Power) | 400 Watts |
| Rated Power (RMS Continuous Power) | 50 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged |
| Dynamic Power (PVC/PowerCube®) | 75 Watts x 4 @ 4-Ohm 130 Watts x 4 @ 2-Ohm 270 Watts x 2 @ 4-Ohm Bridged |
| Bridgeable | Yes |
| Frequency Response | 20Hz - 20kHz +/- 1dB |
| Input Sensitivity | 150 mV to 12 V |
| Circuit Topology Class | Class D |
| Efficiency (average) | > 75% |
| Total Harmonic Distortion (THD+Noise) | 4-Ohm < 1.0 2-Ohm < 1.0 |
| Signal Input | Input Switch: 2ch/4ch input switch Hi-Level: Variable DC offset sensitivity High-Level: Harness Low-Level: 2 Pair RCA |
| Signal Output | — |
| Tone Controls | — |
| Crossover Controls | High-Pass: 60Hz or 80Hz @ 12dB/Octave Low-Pass: 80Hz @ 12dB/Octave |
| Remote Controls | — |
| Visual Indicators | Power: Blue Protect: Red Input Clip: Red Output Clip: Blue/Violet/Red LED Color Legend BLUE: <0.5% TDH VIOLET: 1% THD RED: ≥10% THD |
| Power Wire Gauge | 8 AWG |
| Power Input Connector | Detachable Compression Terminal |
| Speaker Wire Gauge | 16 AWG |
| Speaker Output Connector | Front: 4-Pin Harness Rear: 4-Pin Harness |
| Cooling | Convection |
| Heatsink | Extruded Aluminum |
| Operating Voltage | 9 - 16 VDC |
| Recommended Fuse (not included) | 60 A |
| Average Current Draw (13.8V Music) | 27 A |
| Max. Current Draw (13.8V Sinewave) | 50 A |
| Suggested Alternator | 75 A |
| Dimensions (H x W x D) | 1.53 x 4.25 x 6.75 (in) 3.9 x 10.79 x 17.16 (cm) |
| Shipping Weight | 3.1 Lbs. (1.4 Kg.) |
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Installation resources
Wiring diagrams
10
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
Popular Questions
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