PM400X4

The Rockford Fosgate PM400X4 is a powerful 4-channel marine amplifier from the Punch series with a total output of up to 400 watts RMS. Thanks to its rugged construction, high-quality components, and special protection against moisture and corrosion, it is ideal for use in boats, marine audio systems, and powersports vehicles.

Class A/B amplifier technology ensures dynamic and detailed music reproduction. With its versatile connection and setup options, the PM400X4 can power either four speakers or a combination of front speakers and subwoofers.

The built-in C.L.E.A.N. technology makes it easy to precisely adjust the input and output levels. In addition, the adjustable high- and low-pass filters and the built-in Punch EQ allow you to customize the sound.

The corrosion-resistant circuit boards, stainless steel components, and the sturdy aluminum housing with a heat sink ensure high durability under demanding operating conditions.

Product Features

• High-Performance 4-Channel Marine Amplifier with Class A/B Technology

• Up to 400 watts RMS total power

• 2-ohm stable in 4-channel operation

• Bridgeable operation with 2 × 200 watts RMS at 4 ohms

• Element Ready Design for Marine and Powersports Applications

• Special protective coating on printed circuit boards to protect against moisture and corrosion

• Corrosion-Resistant Stainless Steel Components

• Solid aluminum heat sink for heat dissipation

• C.L.E.A.N. technology for simplified level adjustment

• Adjustable high-pass and low-pass filters

• Punch EQ for custom bass and treble adjustment

• High-level inputs with automatic power-on function when using a suitable adapter

• Switchable 2-/4-channel input mode

• Protected, top-mounted control panel

• Built-in protection circuits against short circuits and overloads
  
  

Technical Specifications

General Information

• Manufacturer: Rockford Fosgate

• Model: PM400X4

• Series: Punch Marine

• Amplifier Type: 4-Channel Marine Power Amplifier

• Amplifier Class: Class A/B

• Number of channels: 4

• Total RMS power: 400 watts

• Operating voltage: 9–16 V DC

• Recommended external fuse rating: 60 A

• Amplifier Technology: CTA-2006-Compliant Power Specifications
  
  

RMS output power at 14.4 V

• 4 ohms: 4 × 50 watts RMS

• 2 ohms: 4 × 100 watts RMS

• 4 ohms bridged: 2 × 200 watts RMS

• Minimum speaker impedance per channel: 2 ohms

• Minimum speaker impedance in bridge mode: 4 ohms
  
  

Audio and Sound Parameters

• Frequency response: 20 Hz – 20,000 Hz

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

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

• Signal-to-noise ratio according to CTA-2006: over 85 dB

• Signal-to-noise ratio relative to rated power: over 105 dB

• Channel separation: over 50 dB

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

• Damping factor: over 500

• Input sensitivity: 150 mV – 12 V

• Input impedance: 20 kOhm
  
  

Crossover Networks and Equalizers

• High-pass filter (HPF): 50–250 Hz, continuously adjustable

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

• Full-range operation: Yes

• Filter characteristic: Butterworth

• Slope: 12 dB/octave

• Punch Bass EQ: 0 to +18 dB at 45 Hz

• Punch Treble EQ: 0 to +14 dB at 12.5 kHz

• Separate crossovers for front and rear channels
  
  

Connections and Features

• RCA (low-level) inputs

• High-level input via a suitable adapter

• Automatic power-on function via a high-level signal using an optional adapter

• 2-/4-Channel Input Switching

• C.L.E.A.N. System with Clip Indicators

• Power/Protect Status Indicators

• Protective circuit against short circuits and overloads

• Concealed control panel on the top of the housing

• Power connections for cable cross-sections up to 4 AWG (20 mm²)
  
  

Housing and Dimensions

• Housing material: Aluminum

• Cooling: Passive aluminum heat sink

• Printed Circuit Boards: Marine Protective Coating

• Fastening components: Corrosion-resistant stainless steel

• Length: 280 mm

• Width: 197 mm

• Height: 61 mm
  
  

What's Included

• 1 × Rockford Fosgate PM400X4 4-Channel Marine Amplifier

• Installation hardware

• User and Installation Manual

• Individual Performance Certificate