Rockford Fosgate M400-4D

Features:

• 4-Channel Full Range Class D Marine Amplifier
• RMS Power Rating:
  • 4 ohms: 75 watts x 4 chan.
  • 2 ohms: 100 watts x 4 chan.
  • Bridged, 4 ohms: 200 watts x 2 chan.
• UV resistant and Salt-fog marine protection
• Pulse Width Modulated MOSFET power supply
• LED power (green) and protect (red) indicators
• Variable Bass Boost (0 to +18 dB bass boost at 50 Hz)
• Soft start turn-on
• 4/3/2 channel operation
• Preamp RCA output to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• High-density split-dome convection heat-sink for extreme heat dissipation
• Nickel-plated RCA level inputs
• Nickel-plated screw terminals
• Input sensitivity:
  • Low level: 125mV-5V
  • High level: 250mV-10V
• Variable high-pass filter (50-500 Hz, 24 dB/octave)
• Variable low-pass filter (50-500 Hz, 24 dB/octave)
• CEA-2006 compliant amplifier
• Frequency response: 20-20000 Hz
• 4 gauge power and ground wiring is required for installation.
• Dimensions: 6-7/10 Inch W x 9-1/10 Inch L x 2 Inch H

Specifications:

Power Specifications - Full Range Channels:

• RMS Power @ 4 ohms: 75 watts x 4 channels
• RMS Power @ 2 ohms: 100 watts x 4 channels
• Bridged RMS Power: 200 watts x 2 channels

Amplifier Specifications:

• Amplifier Series: Prime (Rockford Fosgate)
• Marine Certified: Yes
• Amplifier Class: D
• Number of Channels: 4
• Total RMS Power Output: 400 watts
• Maximum Input Gauge Size: 4 AWG
• Minimum Impedance Unbridged: 2 ohms
• Minimum Impedance Bridged: 4 ohms
• THD at Rated RMS Power: <1.0%
• Speaker Level Inputs: No 
• Preamp Outputs: 1 pair
• Built-in Crossover: Low-Pass (LP), High-Pass (HP), Full (AP)
• High-Pass Crossover Frequency: 50 - 250 Hz
• Low-Pass Crossover Frequency: 50 - 250 Hz
• Bass Boost: 0 - 18 dB
• Bass/Gain Remote: No
• Fan Cooled: No
• Fuse Rating: 40A X 1 In-Line Fuse Recommended
• CEA-2006 Compliant: Yes