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 |