P500X1bd

The Rockford Fosgate P500X1bd is a powerful 1-channel mono amplifier from the Punch series, designed specifically to drive subwoofers with power and precision. Thanks to its efficient Class bd circuit technology, the amplifier delivers up to 500 watts RMS into 1 ohm and impresses with high power reserves, low distortion, and excellent bass control.

With the built-in Punch EQ2 bass boost, a variable low-pass filter, and a switchable infrasound filter, bass reproduction can be optimally adjusted to the specific subwoofer system. The innovative C.L.E.A.N. system, featuring input and output clipping indicators, makes it easier to set the correct level and helps prevent distortion.

Other features include high-level inputs with automatic power-on, RCA loop-through outputs, and a solid aluminum heat sink. The concealed controls give the unit a high-quality look. An optional PLC2 bass remote control allows for convenient volume adjustment from the driver’s seat.

Technical Specifications

General Characteristics

• Amplifier type: 1-channel mono amplifier

• Series: Rockford Fosgate Punch

• Model: P500X1bd

• Amplifier Technology: Class bd

• Number of channels: 1

• 1-ohm stable

• CEA-2006-compliant performance specifications

• Suitable for subwoofers and low-frequency speakers

• High-quality aluminum heat sink

• Passive cooling without a fan
  
  

RMS output power at 14.4 V

• 1 × 150 watts RMS at 4 ohms

• 1 × 300 watts RMS at 2 ohms

• 1 × 500 watts RMS at 1 ohm
  
  

Crossover Networks and Sound Settings

• Frequency response: 20–250 Hz

• Low-pass filter: 50–250 Hz, continuously adjustable

• Low-pass slope: 12 dB/octave

• Filter characteristic: Butterworth

• Infrasound filter: 28 Hz

• Infrasound filter slope: 12 dB/octave

• Punch EQ2 Bass Boost: 0 to +18 dB at 45 Hz

• Remote Bass Level Control: Optional via Rockford Fosgate PLC2
  
  

Signal Processing and Connections

• Input sensitivity: 150 mV – 12 V

• Input impedance: 20 kOhm

• 1 pair of RCA inputs

• High-level input with automatic turn-on function

• 1 pair of RCA loop-through outputs

• Power connections: For 4 AWG cable (approx. 21 mm²)

• Speaker terminals: For 8–18 AWG cables

• Screw/Terminal Connections for Power Supply and Speakers

• Automatic activation via a high-level signal

• Delayed, Low-Noise Power-On (Muted Turn-On)
  
  

Audio and Performance Parameters

• Total Harmonic Distortion plus Noise (THD+N): less than 1.0% at 4 ohms

• Total Harmonic Distortion plus Noise (THD+N): less than 1.0% at 2 ohms

• Total Harmonic Distortion plus Noise (THD+N): less than 1.0% at 1 ohm

• Signal-to-noise ratio according to CEA-2006: over 80 dB

• Signal-to-noise ratio at rated power: over 100 dB

• Damping factor: over 300

• Common-mode rejection: over 55 dB
  
  

Power Supply and Protection Functions

• Operating voltage: 9–16 V DC

• Recommended external fuse rating: 80 A

• Average current consumption during music playback (13.8 V): 35 A

• Maximum current draw with a sine wave signal (13.8 V): 70 A

• Overcurrent Protection

• Short-Circuit Protection

• Thermal Protection Circuit

• Operating, Protection, and Temperature Status Display

• C.L.E.A.N. System for Controlling Input and Output Distortion

• LED clipping indicators for precise level adjustment
  
  

Dimensions

• Width: 197 mm

• Height: 61 mm

• Length: 280 mm
  
  

What's Included

• 1 × Rockford Fosgate P500X1bd Mono Amplifier

• 1 × User and Installation Manual

• 1 × Individual Performance Certificate

• Mounting hardware