JL Audio JD250/1 Monoblock Subwoofer Amplifier
Powerful Performance
Delivering a robust 250 watts into 2 ohms (14.4V, 1% THD), the JD250/1 amplifier is the ideal choice for powering subwoofers in a cost-effective audio system. Featuring JL Audio’s proprietary NexD™ switching technology, this amplifier provides impressive real-world power output with exceptional efficiency and ultra-low distortion, ensuring clean and powerful bass performance.
User-Friendly Design and Features
The JD250/1 is designed with convenience in mind. Controls are located on the input panel for easy access, while power and speaker connections are housed on the opposite side of its durable extruded aluminum chassis. The amplifier includes essential signal processing features such as a 12 dB/octave low-pass filter with a continuously adjustable frequency range from 50 to 500 Hz and a variable bass boost EQ for added tuning flexibility.
Its dual-range, differential-balanced inputs accept both line-level and speaker-level signals, offering versatility in integration. Automatic turn-on capabilities—via signal sensing or DC-offset sensing—make installation seamless, while preamp outputs allow for easy signal passing to additional amplifiers in your system.
Precision and Control
Setting input sensitivity is effortless with the onboard LED-clipping indicator ring, which surrounds the input sensitivity control. This intuitive feature lets you fine-tune your amplifier quickly and accurately without the need for specialized tools. For added convenience, the JD250/1 supports the optional RBC-1 remote level control (sold separately), enabling you to adjust subwoofer levels directly from the driver’s seat.
Built for reliable performance and flexibility, the JD250/1 delivers exceptional value and uncompromising sound quality in any system.
Specifications
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
@ 1.5 Ω: N/A
Rated Continuous (RMS) Power @ 12.5 V
@ 4 Ω: 115 W RMS x 1
@ 3 Ω: 150 W RMS x 1
@ 2 Ω: 200 W RMS x 1
@ 1.5 Ω: N/A
General Specifications
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™)
Signal Processing
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
Physical Specifications
Height (H): 2.10 in / 53 mm
Width (W): 9.50 in / 242 mm
Depth (D): 7.50 in / 190 mm
