Product Highlights:

The PM400X4 is a 400 Watt 4-channel amplifier with high dynamic power using Class-a/b technology and a conformal coated pc board designed for motorsport and marine applications.

The PM400X4 is perfect for 4-way front-stage/rear-fill or 3-way front-stage/subwoofer systems. Simply drop a pair of component speakers on the front channels and subs on the rear and BOOM - you got "The PUNCH." With its flexible design, the PM400X4 is an excellent amplifier choice for virtually any vehicle.

• High level input capable with Auto Turn-On circuit
• Features C.L.E.A.N. Set-up
• 12dB/octave Butterworth crossover
• On-board Punch EQ with +18dB boost @ 45Hz
• Muted turn on
• Stealth top mounted control panel
• Cast aluminum heatsink
• Short circuit protection
• Over current protection
• Marine grade two part epoxy coating on circuit boards
• Marine grade stainless steel hardware
• 2 Year Warranty

Specifications:

• Recommended Fuse (not included)60 A
• CEA-2006 CompliantCEA-2006 Guidelines CEA-2006 Power Rating
• 50W x 4 @ 4ä‹_
• ≤1.0% THD+N
• Max. Current Draw (13.8V Sinewave)60 A
• Average Current Draw (13.8V Music)30 A
• Total Harmonic Distortion (THD+Noise)4-Ohm: <1.0% 
• 2-Ohm: <1.0%
• Dynamic Power 
• (PVC/PowerCube®)82 Watts x 4 @ 4-Ohm 
• 137 Watts x 4 @ 2-Ohm 
• 266 Watts x 2 @ 4-Ohm Bridged
• Efficiency (average)67% @ 4-Ohm
• Shipping Weight10.8 Lbs. (4.89 Kg.)
• Operating Voltage9 - 16 VDC
• Number of Channels4
• Crossover ControlsFront High-Pass/Low-Pass (HP/LP): 50Hz-250Hz @ 12dB/octave Butterworth 
• Rear High-Pass/Low-Pass (HP/LP): 50Hz-250Hz @ 12dB/octave Butterworth 
• All-Pass: Yes
• Suggested Alternator75 A
• Input Sensitivity150 mV - 12 V
• Rated Power 
• (RMS Continuous Power)50 Watts x 4 @ 4-Ohm 
• 100 Watts x 4 @ 2-Ohm 
• 200 Watts x 2 @ 4-Ohm Bridged
• Total Power 
• (Sum of Rated Power)400 Watts
• BridgeableYes
• Tone ControlsFront Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or 
• Front Punch EQ2 Treble: 0dB to +12dB @ 12.5kHz 
• Rear Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or 
• Rear Punch EQ2 Treble: 0dB to +12dB @ 12.5kHz 
• Function depends upon LP/AP/HP switch position
• Signal InputHi/Low level: 2 RCA pair
• Signal Output-
• Power Input ConnectorCaptive C-Clamp
• Power Wire Gauge8 AWG to 4 AWG
• Speaker Output ConnectorCaptive C-Clamp
• Speaker Wire Gauge8 AWG to 18 AWG
• Heat Sink TypeCast aluminum
• CoolingConvection
• Remote Controls-
• Visual IndicatorsPower/Protect/Thermal LED 
• Input Clip LED3 
• Output Clip LED1,2,3
• LED Color Legend: 
• 1BLUE: <0.5% THD 
• 2VIOLET: 1% THD 
• 3RED: 10%+ THD
• Circuit Topology ClassClass A/B
• Frequency Response20Hz to 20kHz +/- 1.0dB
• Dimensions (H x W x D)2.38 x 7.76 x 11.03 (in) 
• 6.05 x 19.71 x 28.02 (cm)

What's in the Box:

• Owner's manual
• 4-Channel marine amplifier
• 2.5mm Allen wrench
• Four 1-1/2" Self-tapping screws
• Setup disc (CD)
• Setup guide
• Certificate of Performance Verification