PBR300X1

The Rockford Fosgate PBR300X1 is an exceptionally compact 1-channel mono amplifier from the Punch series, delivering up to 300 watts RMS. Thanks to innovative Boosted Rail Technology (BRT), the amplifier offers high efficiency with a small footprint and low distortion. This makes it ideal for space-saving car audio installations, motorcycles, ATVs, and other vehicles with limited installation space.

The built-in Punch EQ bass boost allows for custom tuning of the low-frequency range. The variable low-pass filter allows the amplifier to be optimally tuned to the connected subwoofer. High-level inputs with an automatic power-on function simplify integration into factory-installed sound systems without the need for an additional remote wire.

The rugged, ultra-compact housing, featuring a MOSFET output stage, LED status indicators, and comprehensive protection circuits, ensures reliable operation even under demanding installation conditions.

Technical Specifications

General Characteristics

• Model: Rockford Fosgate PBR300X1

• Series: Punch PBR

• Amplifier type: 1-channel mono amplifier

• Amplifier Technology: Class BRT (Boosted Rail Technology)

• Output stage: MOSFET

• Number of channels: 1

• Minimum impedance: 1 ohm

• Operating voltage: 9–16 V DC

• Automatic power-on via high-level input

• High-level and RCA inputs

• RCA Pass-Through Output

• LED Operation and Status Indicators

• Compact design for space-saving installations
  
  

RMS output power at 14.4 V

• 1 × 75 watts RMS at 4 ohms

• 1 × 150 watts RMS at 2 ohms

• 1 × 300 watts RMS at 1 ohm
  
  

Crossover Networks and Sound Settings

• Frequency response: 20–250 Hz (±1 dB according to the user manual)

• Low-pass filter: 35–250 Hz, continuously adjustable

• Low-pass slope: 12 dB/octave (Butterworth)

• Infrasonic filter: 28 Hz, 12 dB/octave

• Punch EQ Bass Boost: 0 to +18 dB at 45 Hz

• Connection for optional Punch EQ bass remote control
  
  

Electrical and Acoustic Properties

• RCA input sensitivity: 150 mV – 4 V

• High-level input sensitivity: 400 mV – 11 V

• Input impedance: 20 kOhm

• Signal-to-noise ratio at 1 W / 4 ohms: ≥ 85 dB (A-weighted)

• Signal-to-noise ratio at rated power / 4 ohms: ≥ 105 dB (A-weighted)

• Total Harmonic Distortion plus Noise (THD+N): less than 0.2% at 4 ohms

• Damping factor: over 200

• Common-Mode Rejection Ratio (CMRR): over 55 dB at 1 kHz

• Recommended external battery fuse: 30 A

• Performance specifications according to CEA-2006
  
  

Connections and Protective Functions

• RCA Low-Level Input

• High-Level Speaker Input

• RCA Signal Output (RCA Pass-Through)

• Automatic Power-On via DC Offset

• Adjustable DC-Offset Turn-On Threshold

• Short-Circuit Protection

• Protection against excessively low speaker impedance

• Thermal Overheating Protection
  
  

Dimensions

• Width: 108 mm

• Height: 39 mm

• Length: 172 mm
  
  

What's Included

• 1 × Rockford Fosgate PBR300X1 mono amplifier

• Connection and installation accessories as specified in the manufacturer's packaging

• User and Installation Manual