Description
JL Audio JD250/1: Monoblock Class D Subwoofer Amplifier, 250 W
JD Amplifiers redefine a high-value package in terms of performance and efficiency. JL Audio’s NexD™ switching technology and clipping indicators (for ease in setting Input Sensitivity), add tremendous bang for your buck. Their dual-range, differential-balanced inputs minimize noise, while maximizing compatibility with a wide range of signal levels. Monoblock models also include variable bass boost and Remote Level Control capability when used with an optional RBC-1 Remote Bass Control.
They fit nearly anywhere!JD1000/1: 11.40 x 7.50 x 2.10 in. (290 x 190 x 53 mm). High-mass heat sink improves thermal capacity leading to reduced incidence of shut-down events.
NexD™ Switching Amplifier Technology: Our 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. Specifically optimized for subwoofer applications (7 Hz - 500 Hz bandwidth).
Complete Signal Processing Package: 12dB/octave low-pass filter, non-defeatable, with fully variable filter frequency selection from 50-500 Hz. Adjustable 0 to +12 dB Bass Boost EQ @ 45 Hz. Remote level control with optional controller (RBC-1). Preamp outputs (buffered, pass-through type)
Dual-Range, Differential-Balanced Inputs and Automatic Turn-On CapabilitiesBenefits: 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. Automatic turn-on option via Signal-Sensing or DC-Offset sensing
Integrated LED Clipping Indicator for Easy Setup: Simplifies input-sensitivity setting by providing accurate visual feedback of output clipping level.1) Disconnect one speaker output wire, 2) 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 | 150 W RMS x 1 |
| @ 3 Ω | 200 W RMS x 1 |
| @ 2 Ω | 250 W RMS x 1 |
General Specifications
| Frequency Response | 10 Hz - 150 Hz (+0, -1dB) |
| S/N Ratio, referred to highest rated power | >97 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 | >1000 / 50 Hz |
| Damping Factor @ 2 Ω | >500 / 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 | 8 AWG wire |
| Fuse Rating | 30 A (AFS, AGU or MaxiFuse™) |
Signal Processing
| Filter Mode(s) | Low-Pass only |
| Filter Slope(s) | 12 dB/octave |
| Filter Frequency Range | 50 Hz - 200 Hz |
| Detented, Calibrated Filter Freq. Potentiometer | No |
| Filter Defeat Function | No |
| Infrasonic Filter | none |
| Bass Boost EQ | 0 to +12 dB @ 45 Hz |
| Output Polarity Switch | No |
| Remote Subwoofer Level Control | Optional (RBC-1) |
| Remote Bass EQ Boost Control | No |
| Pass-Through Preamp Output | Unbuffered |
Physical Specifications
| Height (H) | 2.10 in / 53 mm |
| Width (W) | 9.50 in / 242 mm |
| Depth (D) | 7.50 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.