Jensen - JAFOUR 4 Channel MOSFET Amplifier 125 Watts - Black/Gray
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About this product
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. Specifications: Speaker Outputs: 4 Class: D Digital CTA-2006-D Certification: Certified 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
Key Feature
High Output Power: 125W x4 @ 4Ω, 215W x4 @ 2Ω, or 445W x2 bridged @ 4Ω (1% THD+N) for flexible system configurations
Key Feature
Dynamic Performance: Up to 950W max dynamic power (10% THD+N) ensures strong headroom and impactful sound
Key Feature
Advanced Crossover Control: Selectable HPF/LPF/full-range with adjustable 50–250 Hz range for precise tuning
Key Feature
Clean Audio Signal: 82 dBA S/N ratio and <0.12% THD+N for low-noise, distortion-free playback
Key Feature
Flexible Connectivity: Compatible with high-level (speaker wire) and RCA inputs; 2Ω stereo stable and bridgeable design
- Amplifier ClassDNumber Of Channels4Bass BoostVariable
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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. Specifications: Speaker Outputs: 4 Class: D Digital CTA-2006-D Certification: Certified 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

Built for clean, reliable bass amplification, the JAOne brings efficient Class-D performance in a compact mono-block layout. Whether you’re pushing a single subwoofer or looking for tight, distortion-free low end, this amp delivers. It supports both high-level (speaker wire) and low-level (RCA) inputs for easy integration with a variety of systems. With a selectable low-pass filter, variable bass boost, and bridgeable power, the JAOne gives you the flexibility to dial in serious low-frequency impact without taking up unnecessary space. Why it’s robust Real power you can use: 300W RMS @ 4Ω, 500W RMS @ 2Ω, or 1000W RMS @ 1Ω (1% THD+N). Strong dynamic headroom: Up to 1300W max dynamic power (10% THD+N). Precision tuning: Selectable low-pass filter (50–150 Hz), plus variable bass boost @ 45 Hz (0–6 dB). Clean signal path: 90 dBA S/N (1 W ref) and <0.12% THD+N at 1 W for clean, efficient output. Flexible integration: Works with high-level and RCA inputs; 1Ω stable for subwoofer applications. Installer friendly: Variable gain (200 mV–6 V), 8 AWG power/ground and 12 AWG speaker wire recommendations, 30A x 3 fuses, and a compact 2.01” x 5.67” x 8.25” (H x D x W) footprint. Peak Power This amp can reach a max dynamic power of 1525 Watts for a powerful listening experience! Compact Design This amp’s compact design makes for easy, non-intrusive, and convenient installation! Efficient Power Output The JAOne Amp has a class D design for improved longevity and high efficiency power output. Product Specs: Speaker Outputs: Mono Class: D Digital CTA-2006-D Certification: Certified Speaker Inputs: High level (Speaker Wire), Low Level (RCA) Total Dynamic Power: 1000 Watts Crossover: Adjustable low-pass crossover (50 Hz – 150 Hz) Frequency Response: 20 Hz – 150 Hz Gain Adjustment: Variable 200 mV ~ 6 V Signal to Noise Ratio: 90 dBA Recommended Power/Ground Wire: 8 AWG Recommended Speaker Wire: 12 AWG Dimensions: 2" x 5.63" x 8.24" (H x D x W) Fuse Size and Type: 20A x 3

JATwo 2‑Channel Class‑D Amplifier Clean Power, Flexible Control, Compact Size Deliver tight, dynamic sound in tight spaces. The JATwo packs efficient Class‑D power and installer‑friendly controls into a compact chassis, giving you precise tuning and reliable output whether you’re running a pair of full‑range speakers or bridging for a subwoofer. High‑level (speaker‑wire) and low‑level (RCA) inputs make integration simple with factory or aftermarket head units, while selectable high‑pass/low‑pass crossovers and variable bass boost let you dial in your system to the room—or the road. Why it’s robust Real power you can use: 125W x2 @ 4Ω, 215W x2 @ 2Ω, or 445W x1 bridged @ 4Ω (1% THD+N). Strong dynamic headroom: Up to 530W 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: 87 dBA S/N (1 W ref) and <0.12% THD+N at 1 W for clear, low‑noise playback. Easy integration: High‑level and RCA inputs; 2/4‑ohm stable stereo; bridgeable for sub applications. 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 6.54″ x 6.77″ (H x D x W) footprint. Peak Power This amp can reach a max dynamic power of 530 Watts for a powerful listening experience! Compact Design This amp’s compact design makes for easy, non-intrusive, and convenient installation! Product Specs: Speaker Outputs: 2 Class: D Digital CTA-2006-D Certification: Certified Speaker Inputs: High level (Speaker Wire), Low Level (RCA) 2 Ohm Stable Stereo Operation: Yes Total Dynamic Power: 530 Watts Crossover: Adjustable high-pass/low-pass/full range 50 Hz – 250 Hz Frequency Response: 20 Hz ~ 20 kHz Gain Adjustment: Variable 300mV ~ 6V Recommended Power/Ground Wire: 8 AWG Recommended Speaker Wire: 12 AWG Fuse Size and Type: 20A x 3

Power your subwoofer with this JA Series Class-D mono car amplifier, producing 1,000 Watts peak power with 240W RMS x 1 at 4 ohms, 400W RMS x 1 at 2 ohms, and 600W RMS x 1 at 1 ohm. The Class-D design delivers high-efficiency output and improved longevity, while the compact chassis makes for easy, non-intrusive installation under a seat or behind a panel. Flexible input options and selectable crossovers let you dial in exactly the bass you want.
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