Description
JD-Series Monoblock Amplifier, 250-Watt @ 2-Ohm or 150-Watt @ 4-Ohm
Designed to produce a healthy 250 watts into 2 ohms (14.4V, 1% THD), the JD250/1 amplifier is a great solution for powering subwoofers in a cost-conscious system. JL Audio's proprietary NexD™ switching technology delivers large amounts of real-world power output with excellent efficiency and ultra-low distortion.
The JD250/1’s controls are located on the input panel. while the power and speaker connections can be found along the opposite end of its extruded aluminum chassis. Signal processing features include a 12 dB / octave low-pass filter, with continuously variable frequency selection from 50-500 Hz, and a variable bass boost EQ. Dual-range, differential-balanced inputs are also on-hand, capable of accepting line-level and speaker-level signals. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.
The JD250/1 is also equipped with an onboard LED-clipping indicator ring, surrounding the input sensitivity control. This useful feature lets you easily set your amplifier’s input sensitivity, quickly and accurately, without special equipment. With the addition of an RBC-1 remote level control (sold separately), you can control the subwoofer level from the driver’s seat.
General Specifications
| @ 4 Ω |
150 W RMS x 1 |
| @ 3 Ω |
200 W RMS x 1 |
| @ 2 Ω |
250 W RMS x 1 |
| Frequency Response |
7 Hz - 500 Hz (+0, -1dB) |
| S/N Ratio, referred to highest rated power |
>80 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| S/N Ratio, referred to 1 W |
>60 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 |
Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High) |
| Min.Copper Power / Ground Wire Gauge |
8 AWG wire |
| Fuse Rating |
30 A (AFS, AGU or MaxiFuse™) |
| Filter Mode(s) |
Low-Pass only |
| Filter Slope(s) |
12 dB/octave |
| Filter Frequency Range |
50 Hz - 500 Hz |
| Detented, Calibrated Filter Freq. Potentiometer |
No |
| Filter Defeat Function |
No |
| Infrasonic Filter |
No |
| Bass Boost EQ |
Yes |
| Output Polarity Switch |
No |
| Remote Subwoofer Level Control |
Optional (RBC-1) |
| Remote Bass EQ Boost Control |
No |
| Pass-Through Preamp Output |
Buffered |
