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What's Inside?
• Monoblock Subwoofer Amplifier
• 2.5mm Hex Key
• 3mm Hex Key
• Owner's Manual
JL Audio's JD Series Amplifier
The youngest brother in JD Series amplifiers, the JL Audio JD250/1 can still maximize your subwoofer's potential thanks to its Class-D amp design technology. This mono subwoofer amplifier is equipped with JL Audio's own patented technologies and has a compact chassis, so not only do you get a high-quality bass output from it, but you won't also have a hard time installing it in your vehicle.
NexD Switching Technology
The amplifier is equipped with the famous NexD Switching technology, which uses a self-oscillating modulator to help remove the noise that comes from fluctuations in power supply voltage. JL Audio’s JD250/1 is also loaded with differential-balanced inputs, which also cancels out the noise that comes from the usual car audio system wiring setup.
Power Handling
The JL Audio JD250/1 can deliver a power output of 150 Watts at 4 ohms and 250 Watts at 2 ohms. With a frequency response of 7 up to 500 Hz, you get not only a loud bass output but also a deep and extensive low-frequency performance with minimal distortion.
Variable Low-Pass Filter
This mono amplifier also has a variable low-pass filter that can be set from 50 up to 500 Hz and a bass boost control of up to 12 dB at 45 Hz. With JL Audio JD250/1’s features, you can get the more defined bass quality that you deserve.
| Brand | JL Audio | 
| RMS Power Output (Watts x Channels) | 150 x 1 | 
| Peak Power Output (Watts x Channels) | N/A | 
| Power at 2 Ohms (Watts x Channels) | 250 x 1 | 
| Bridged Power (Watts x Channels) | N/A | 
| Minimum Impedance Bridged | N/A | 
| Minimum Impedance Unbridged | 2 | 
| Minimum Impedance | 2 | 
| Amplifier Class | D | 
| Low-Pass Crossover Frequency | 50-500 Hz | 
| Low-Pass Slope (dB/octave) | 12 dB/octave | 
| High-Pass Crossover Frequency | N/A | 
| High-Pass Slope (dB/octave) | N/A | 
| Best Frequency Response | 7-500 Hz | 
| THD at Rated RMS Power | 0.01 | 
| Signal to Noise Ratio | 80 dB | 
| Input Voltage | 14.4v | 
| Bass Boost | 0-12 dB | 
| Bass Boost Frequency | 45 Hz | 
| Fan Cooled | No | 
| Fuse Rating | 30 | 
| Speaker Level Inputs | Yes | 
| Preamp Outputs | 2 | 
| Width (inches) | 9 9/16" | 
| Height (inches) | 2 1/8" | 
| Depth (inches) | 7 1/2" | 
| Parts Warranty | 1 Year | 
| Labor Warranty | 1 Year |