Description
JL Audio JD400/4
Compact and Versatile: Fits nearly anywhere: 9.50 x 7.50 x 2.10 in. (242 x 190 x 53 mm) Ultra-flexible outputs, capable of multiple configurations:4-Ch. Satellite Amp: power front and rear speakers with 75W x 43-Ch. System Amp: power front speakers with 75W x 2 and a sub with up to 200W2-Ch. High-Power Satellite Amp: power 2pr. of speakers with 200W x 22-Ch. High-Power Subwoofer Amp: drive two subwoofers with 200W x 2
NexD™ Switching Amplifier Technology: Our advanced high-speed switching technology delivers outstanding fidelity with very low noise and distortion. Exceptional efficiency results in reduced current draw and heat, permitting reliable high power output within a very small chassis. Full-bandwidth operation in all channels. (20 Hz - 20 kHz bandwidth)
Complete Signal Processing Sections: 12dB/octave high or low-pass filters for each channel pair, defeatable, with fully variable frequency selection from 50-500 Hz. Preamp outputs (buffered, pass-through type, from CH. 1&2)
Dual-Range, Differential-Balanced Inputs and Automatic Turn-On Capabilities: NO NOISE! Outstanding noise rejection prevents alternator whine and other noises. Accepts line-level or speaker level signals up to 8V RMS, including those from factory systems, without a line-output converter (LOC): just splice wires to a pair of RCA ends or RCA cables. Selectable Input Mode switch permits one pair of inputs to feed both pairs of output channels. Automatic turn-on option via Signal-Sensing or DC-Offset sensing
Integrated LED Clipping Indicators for Easy Setup: Simplifies input-sensitivity setting by providing accurate visual feedback of output clipping level.1) Disconnect one speaker output wire2) Play full-scale (0 dBfs) sine-wave through audio system, with head unit at 3/4 volume and tone controls set flat.3) Adjust input sensitivity until light turns on, then back off slightly. Separate, top-mounted LEDs report overall status and condition
Rated Continuous (RMS) Power @ 14.4 V
| @ 4 Ω | 75 W RMS x 4 |
| @ 2 Ω | 100 W RMS x 4 |
| Bridged @ 4Ω | 200 W RMS x 2 |
General Specifications
| Frequency Response | 20 Hz - 20 kHz (+0, -1dB) |
| S/N Ratio, referred to highest rated power | >93 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| S/N Ratio, referred to 1 W | >76 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| Damping Factor @ 4 Ω | >60 / 50 Hz |
| Damping Factor @ 2 Ω | >30 / 50 Hz |
| THD+N @ Rated Power | <1% @ 2 Ω per Ch. |
| Input Voltage Range @ RCA Inputs | 200 mV - 4 V RMS |
| Input Voltage Range @ High-Level Inputs | 2 V - 10 V RMS |
| Min.Copper Power / Ground Wire Gauge | 4 AWG wire |
| Fuse Rating | 40 A (AFS, AGU or MaxiFuse™) |
Signal Processing
| Filter Mode(s) | Low-Pass or High-Pass |
| Filter Slope(s) | 12 dB/octave |
| Filter Frequency Range | 50 Hz - 200 Hz |
| Detented, Calibrated Filter Freq. Potentiometers | No |
| Filter Defeat Function | Yes |
| Remote Level Control | No |
| Remote Level Modes | N/A |
| Channel Input Mode Switch | Yes (2/4 ch.) |
| Pass-Through Preamp Output | Unbuffered |
| Source Channel Selection for PreOuts | No (always 2 Ch) |
Physical Specifications
| Height (H) | 2.10 in / 53 mm |
| Width (W) | 9.50 in / 242 mm |
| Depth (D) | 7.5 in / 190 mm |
Used Frequently Asked Questions
- What does used mean? Used products may be unused customer returns that are essentially "new" items, or they may be previously installed products that were returned under warranty or during our return policy period.
- What is the warranty? All of our used items come with a 90-day warranty.
- What's it look like? All of our used items are inspected and graded by our returns team at our facilities. They will test them and grade them to one of four standard gradings: Used Open Box, Used Very Good, Used Good, and Used Acceptable. Please see the following descriptions of each grade - also note that if an item falls under ANY of the criteria for a certain grade, even though the rest of the product is better, we will give it the lowest grade.
- Used Open Box An item in perfect working condition. Original protective wrapping may be missing, but the original packaging is intact and in good condition with minor damage possible. Instructions are included.
- Used Very Good A well-cared-for item with limited use, remains in good working condition. The item may show some limited signs of wear,small scratches,cosmetic blemishes. Item may arrive with damaged packaging or be repackaged and could be missing some accessories.
- Used Good The item shows wear from use, remains in good condition and functions properly. May have damaged packaging or be repackaged. It may be marked, have identifying markings on it, have minor cosmetic damage. It may be missing some parts or accessories.
- Used Acceptable The item is fairly worn but continues to function properly. While repackaged; signs of wear can include aesthetic issues; scratches, dents. The item may have markings on it or show signs of previous use. Item may be missing some parts or accessories.
- Have more questions? Call us, send us a chat, or an email. We'll be able to answer any additional questions you may have.