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The PM400X4 is a 400-Watt 4-channel amplifier with high dynamic power using Class-A/B technology & a conformal coated PC board designed for motorsport & marine.
| Recommended Fuse (not included) |
60 A |
| Average Current Draw (13.8V Music) | 30 A |
| Max. Current Draw (13.8V Sinewave) | 60 A |
| Total Harmonic Distortion (THD+Noise) |
4-Ohm:<1.0% 2-Ohm:<1.0% |
| Number of Channels | 4 |
| CEA-2006 Compliant |
50W x 4 @ 4Ω ≤1.0% THD+N |
| Efficiency (average) | 67% @ 4-Ohm |
| Dynamic Power (PVC/PowerCube®) |
82 Watts x 4 @ 4-Ohm 137 Watts x 4 @ 2-Ohm 266 Watts x 2 @ 4-Ohm Bridged |
| Shipping Weight | 10.8 lb. (4.89 Kg.) |
| Operating Voltage | 9 - 16 VDC |
| Crossover Controls |
Front 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 |
| Input Sensitivity | 150 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 |
| Suggested Alternator | 75 A |
| Total Power (Sum of Rated Power) |
400 Watts |
| Bridgeable | Yes |
| Tone Controls | Front 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 |
| Speaker Wire Gauge | 8 AWG to 18 AWG |
| Signal Output | - |
| Signal Input | Hi/Low level: 2 RCA pair |
| Power Wire Gauge | 8 AWG to 4 AWG |
| Speaker Output Connector | Captive C-Clamp |
| Remote Controls | - |
| Power Input Connector | Captive C-Clamp |
| Heat Sink Type | Cast aluminum |
| Visual Indicators | Power/Protect/Thermal LED Input Clip LED3 Output Clip LED1,2,3 LED Color Legend: 1BLUE: <0.5% THD 2VIOLET: 1% THD 3RED: 10%+ THD |
| Cooling | Convection |
| Frequency Response | 20Hz to 20kHz +/- 1.0dB |
| Circuit Topology Class | Class A/B |
| Dimensions (H x W x D) | 2.38 x 7.76 x 11.03 (in) 6.05 x 19.71 x 28.02 (cm) |
Most products ship directly from our vendor warehouses or distributor network. Shipping times can vary depending on the brand, product size, availability, and destination.
Large or oversized items such as lift kits, wheels, tires, bumpers, exhaust systems, and audio enclosures may require additional handling time or freight shipping.
If there is ever an issue with availability, shipping cost, or delivery timing, we will contact you before moving forward with the order.
Returns may be accepted on most new, unused, unopened items within 30 days of delivery. Items must be in original packaging and in resellable condition.
Installed, used, damaged, missing-parts, electrical, special-order, clearance, or custom-built items may not be eligible for return.
Return shipping is normally the customer’s responsibility unless the return is due to our mistake, such as the wrong item being shipped.
Before sending anything back, please contact Kaos Offroad so we can review the order and provide return instructions. Returns sent without approval may be refused.
Some products are vehicle-specific. Please verify fitment before ordering. If you are unsure, contact us with your year, make, model, sub-model, and any relevant details before purchasing.
Original shipping charges, freight charges, and vendor restocking fees may be non-refundable depending on the item and supplier policy.










