Jensen JAFour 4-Channel Class-D MOSFET Amplifier
Key features
- Amplifier channels: 4
- RMS per channel at 4 ohms: 130 W
- RMS per channel at 2 ohms: 215 W
- Frequency response: 20 Hz–20 kHz
- Input gain range: 0.3–6 V
- Crossover: Selectable high-pass, low-pass or full range; 50–250 Hz
Jensen JAFour 4-Channel Class-D MOSFET Amplifier is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
The Jensen JAFour 4-channel Class-D MOSFET amplifier gives you flexible power for a car audio system, with up to 950 W of dynamic power. Its high-level speaker wire and low-level RCA inputs let you connect it to compatible factory or aftermarket head units.
Selectable high-pass, low-pass, and full-range crossover settings help tailor the signal to your setup. Class-D digital circuitry is designed for cooler operation in tight vehicle mounting spaces.
Key Features & Benefits
- Four channels: Power multiple speakers or use the supported 4-ohm bridged configuration.
- Up to 950 W dynamic power: Delivers the amplifier’s stated maximum dynamic output.
- Two input types: High-level speaker wire and low-level RCA inputs support different head-unit connections.
- Adjustable crossovers: Select high-pass, low-pass, or full range, with adjustment from 50 Hz to 250 Hz.
- Variable bass boost: Adjust boost from 0–6 dB at 45 Hz.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Jensen |
| Model | JAFour |
| Product type | Car audio amplifier |
| Amplifier series | Apex Series |
| Amplifier class | Class-D Digital |
| Channels | 4 |
| Total dynamic power | 950 W |
| Continuous power output (1% THD+N) | 130 W RMS x 4 @ 4 Ohms; 215 W RMS x 4 @ 2 Ohms; 440 W RMS x 2 @ 4 Ohms (Bridged) |
| Maximum dynamic power output (10% THD+N) | 145 W x 4 @ 4 Ohms; 235 W x 4 @ 2 Ohms; 465 W x 2 @ 4 Ohms (Bridged) |
| Frequency response | 20 Hz – 20 kHz |
| Signal-to-noise ratio | 82 dBA (ref: 1 W RMS) |
| Total harmonic distortion (THD+N) | <0.12% at 1 W RMS |
| Crossover | Adjustable high-pass / low-pass / full range (50 Hz – 250 Hz) |
| Bass boost | Variable 0–6 dB at 45 Hz |
| Variable gain | 300 mV – 6 V |
| Audio inputs | High level (Speaker Wire), Low level (RCA) |
| Fuse rating | 2 x 30A |
| Recommended power/ground wire | 8 AWG |
| Recommended speaker wire | 12 AWG |
| Dimensions (H x D x W) | 5.1 cm x 16.6 cm x 23.2 cm |
| Estimated shipping weight | 2.2 kg |
| Compatibility | Vehicle audio systems with standard low-level RCA preamp outputs or high-level factory speaker wire inputs; supports 2 Ohm and 4 Ohm stereo loads and 4 Ohm bridged configurations |
| Warranty | 4-year limited warranty when registered within 60 days of purchase |
| Downloads | Owner Manual (EN); Owner Manual (ES) |
Why Choose This Product?
The JAFour combines four-channel amplification with selectable crossover modes, giving you options for integrating it into a compatible car audio system. Its stated RMS ratings distinguish stereo output at 2 and 4 ohms from bridged output at 4 ohms, helping you compare the amplifier’s power with your system’s requirements.
Both input types offer flexibility when connecting to a compatible factory or aftermarket head unit. The compact dimensions may also be useful when planning an installation in a tight vehicle space.
Installation & Compatibility Notes
Confirm that your head unit provides a compatible RCA preamp output or high-level speaker wire connection. Check speaker impedance and amplifier configuration before installation: the JAFour supports 2-ohm and 4-ohm stereo loads, plus 4-ohm bridged configurations.
Allow for the amplifier’s 5.1 cm x 16.6 cm x 23.2 cm dimensions and plan for the stated 2 x 30A fuse rating. Recommended wiring is 8 AWG for power and ground and 12 AWG for speaker wire.
Frequently Asked Questions
How much power does the Jensen JAFour produce?
Its total dynamic power is 950 W. Continuous output at 1% THD+N is rated at 130 W RMS x 4 at 4 ohms, 215 W RMS x 4 at 2 ohms, or 440 W RMS x 2 at 4 ohms bridged.
Can the JAFour be bridged?
Yes. It supports 4-ohm bridged operation, rated at 440 W RMS x 2 at 1% THD+N.
Can I connect it to a factory head unit?
It accepts high-level speaker wire inputs for compatible factory systems, as well as low-level RCA inputs for compatible preamp outputs.
What crossover settings does it offer?
You can select high-pass, low-pass, or full range, with adjustment from 50 Hz to 250 Hz.
What wire sizes are recommended?
The listed recommendations are 8 AWG power and ground wire and 12 AWG speaker wire.
Explore More
Shop for the Jensen JAFour at 12 Volt Outlet. Want to learn more about Jensen? Explore our Jensen brand profile.
| Brand | Jensen |
| Model | JAFour |
| Product Type | Car Audio Amplifier |
| Amplifier Series | Apex Series |
| Amplifier Class | Class-D Digital |
| Channels | 4 |
| Total Dynamic Power | 950 W |
| Continuous Power Output (1% THD+N) | 130 W RMS x 4 @ 4 Ohms, 215 W RMS x 4 @ 2 Ohms, 440 W RMS x 2 @ 4 Ohms (Bridged) |
| Maximum Dynamic Power Output (10% THD+N) | 145 W x 4 @ 4 Ohms, 235 W x 4 @ 2 Ohms, 465 W x 2 @ 4 Ohms (Bridged) |
| Frequency Response | 20 Hz – 20 kHz |
| Signal to Noise Ratio | 82 dBA (ref: 1 W RMS) |
| Total Harmonic Distortion (THD+N) | <0.12% at 1 W RMS |
| Crossover | Adjustable high-pass / low-pass / full range (50 Hz – 250 Hz) |
| Bass Boost | Variable 0–6 dB at 45 Hz |
| Variable Gain | 300 mV – 6 V |
| Audio Inputs | High level (Speaker Wire), Low level (RCA) |
| Fuse Rating | 2 x 30A |
| Recommended Power/Ground Wire | 8 AWG |
| Recommended Speaker Wire | 12 AWG |
| Dimensions (H x D x W) | 5.1 cm x 16.6 cm x 23.2 cm |
| Estimated Shipping Weight | 2.2 kg |
Frequently asked questions
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