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JAFour 4-Channel Class-D MOSFET Amplifier

  • 4-Channel MOSFET amplifier with Class D design
  • Selectable crossover (high pass / low pass / full range)
  • Maximum Dynamic Power: 950 Watts
  • Dimensions: 1.99” x 6.53” x 9.13” (H x D x W)

*3-year warranty when professionally installed and registered within 60 days of purchase.

3 to 5 year warranty field
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SKU: JAFour Category:
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Features a 2 Ohm stable operation, variable gain adjustment, selectable high pass/low pass/full range crossover, and Class D Technology for great sound!

Model Features

Peak Power

This amp can reach a max dynamic power of 950 Watts for a powerful listening experience!

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Compact Design

This amp’s compact design makes for easy, non-intrusive, and convenient installation!

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Efficient Power Output

The JAFour Amp has a class D design for improved longevity and high efficiency power output.

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Easy Connection

This amp has RCA inputs for easy connection to any stereo system.

JAFour 4 Speakers Connections Graphic
JAFour 2 Speakers 1 Sub Connections Graphic
JAFour 2 Subwoofers Connections Graphic

JAFour 4-Channel Class-D Amplifier

Clean Power, Versatile Control, Compact Form

The JAFour is a powerhouse in a sleek chassis, delivering clean Class-D efficiency and 4-channel flexibility.
Whether you’re powering a full system or bridging channels for higher output, this amplifier provides precise control
and strong, reliable performance. It supports both high-level (speaker wire) and low-level (RCA) inputs, making it
compatible with virtually any audio setup. With selectable high-pass, low-pass, and full-range crossovers plus variable
bass boost, you can customize your system’s sound to match your music—or your mood.

Why it’s robust

  • Real power you can use: 125W x4 @ 4Ω, 215W x4 @ 2Ω, or 445W x2 bridged @ 4Ω (1% THD+N).
  • Strong dynamic headroom: Up to 950W max dynamic power (10% THD+N).
  • Precision tuning: Selectable HPF/LPF with wide 50–250 Hz range, plus variable bass boost @ 45 Hz (0–6 dB).
  • Clean signal path: 82 dBA S/N (1 W ref) and <0.12% THD+N at 1 W for smooth, low-noise performance.
  • Flexible integration: Works with high-level and RCA inputs; 2/4-ohm stereo stable; bridgeable for powerful sub setups.
  • Installer friendly: Variable gain (300 mV–6 V), 8 AWG power/ground and 12 AWG speaker wire recommendations,
    30A fuse, and a compact 1.99” x 6.53” x 9.13” (H x D x W) footprint.
Speaker Outputs

4
Class

D Digital
Speaker Inputs

High level (Speaker Wire), Low Level (RCA)
2 Ohm Stable Stereo Operation

Yes
Total Dynamic Power

950 Watts
Crossover

Adjustable high-pass/low-pass/full range 50 Hz – 250 Hz
Frequency Response

20 Hz ~ 20 kHz
Gain Adjustment

Variable 300mV ~ 6V
Signal to Noise Ratio

82 dBA (reference: 1 Watt RMS)
Adjustable Bass Boost

45 Hz
Recommended Power/Ground Wire

8 AWG
Recommended Speaker Wire

12 AWG
Fuse Size and Type

30A x 2

Power Information

Additional Features and Detailed Specifications:

Specification Details
Variable Gain 300 mV – 6 V
Bass Boost Variable boost at 45 Hz (0–6 dB)
Speaker Impedance 2 or 4 Ohm
Continuous Power Output (1% THD+N)
  • 130 Watts RMS x 4 Channels @ 4 Ohms
  • 215 Watts RMS x 4 Channels @ 2 Ohms
  • 440 Watts RMS x 2 Channels @ 4 Ohms (Bridged)
Maximum Dynamic Power Output (10% THD+N)
  • 145 Watts x 4 Channels @ 4 Ohms
  • 235 Watts x 4 Channels @ 2 Ohms
  • 465 Watts x 2 Channels @ 4 Ohms (Bridged)
Frequency Response 20 Hz – 20 kHz
Signal to Noise Ratio 82 dBA (reference: 1 Watt RMS)
Total Harmonic Distortion (THD+N) <0.12% at 1 Watt RMS

Documents

Manuals & More

JAFour


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