JL Audio RD900/5 5 Ch. Class D System Amplifier, 900 W

5-Channel Class D System Amplifier, 70 W x 4 @ 4 Ω + 500 W x 1 @ 2 Ω - 14.4V

Crafted as an all-in-one, total system solution, the RD900/5 is engineered to power a complete audio system consisting of a subwoofer + four satellite system with 900 watts of high-performance sound. Equipped with our exclusive NexD™ switching technology, this complete power package efficiently generates a potent 70 watts of crystal-clear audio into 4 ohms, plus a robust 500 watts for a subwoofer system, all from a single compact chassis. Each pair of main channels is also fully bridgeable, stoutly producing 200 watts of full-range audio bliss (into 4 ohms), creating an ultra-powerful 3-channel amplifier.

Conveniently located on top of the RD900/5, you’ll find a complement of studio-grade signal processing features, all hidden beneath a removable protective cover. Each pair of main channels is equipped with a 12 dB / octave high-pass filter, with a dedicated low-pass filter for its subwoofer channel. All three crossovers offer continuously variable frequency selection from 50-500 Hz, for precise filtering. Dual-range, differential-balanced inputs are also onboard, capable of accepting most input voltage levels, plus automatic turn-on capability (via signal sensing or DC-offset sensing) for maximum versatility.

LED clipping indicators are also standard equipment for each channel section. This all-new, innovative feature lets you easily set your amplifier’s input sensitivity settings, quickly and accurately, with no special equipment needed. The RD900/5 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition. With the addition of an RBC-1 remote level control (sold separately), you can conveniently control the subwoofer’s output remotely from the driver’s seat.

Main Channels @ 4 Ω	70 W RMS x 4
Main Channels @ 2 Ω	100 W RMS x 4
Main Channels - Bridged @ 4Ω	200 W RMS x 2
Subwoofer Channel @ 4 Ω	225 W RMS x 1
Subwoofer Channel @ 3 Ω	325 W RMS x 1
Subwoofer Channel @ 2 Ω	500 W RMS x 1
Subwoofer Channel @ 1.5 Ω	N/A

 

Rated Continuous (RMS) Power @ 12.5 V

Main Channels @ 4 Ω	60 W RMS x 4
Main Channels @ 2 Ω	90 W RMS x 4
Main Channels - Bridged @ 4Ω	180 W RMS x 2
Subwoofer Channel @ 4 Ω	200 W RMS x 1
Subwoofer Channel @ 3 Ω	250 W RMS x 1
Subwoofer Channel @ 2 Ω	350 W RMS x 1
Subwoofer Channel @ 1.5 Ω	N/A

 

General Specifications

Frequency Response (Main Channels)	12 Hz - 22 kHz (+0, -1dB)
Frequency Response (Subwoofer Channel)	10 Hz - 500 Hz (+0, -1dB)
S/N Ratio, referred to highest rated power (Main Channels)	>104 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
S/N Ratio, referred to 1 W	>84 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
Damping Factor @ 4 Ω	>150 / 50 Hz
Damping Factor @ 2 Ω	>75 / 50 Hz
THD+N @ Rated Power (Main Channels)	<1% @ 2 Ω per Ch.
THD+N @ Rated Power (Subwoofer Channels)	<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	4 AWG wire
Fuse Rating	80 A (AFS, AGU or MaxiFuse™)

 

Signal Processing

Filter Mode(s): Channels 1 & 2 (front)	High-Pass only
Filter Slope(s): Channels 1 & 2 (front)	12 dB/octave
Filter Frequency Range: Channels 1 & 2 (front)	50 Hz - 500 Hz
Filter Mode(s): Channels 3 & 4 (rear)	High-Pass only
Filter Slope(s): Channels 3 & 4 (rear)	12 dB/octave
Filter Frequency Range: Channels 3 & 4	50 Hz - 500 Hz
Filter Mode(s): Subwoofer Channel	Low-Pass only
Filter Slope(s): Subwoofer Channel	12 dB/octave
Filter Frequency Range: Subwoofer Channel	50 Hz - 500 Hz
Detented, Calibrated Filter Freq. Potentiometers	No
Filter Defeat Function	No
Infrasonic Filter: Subwoofer Channel	No
Remote Level Control	Optional (RBC-1)
Remote Level Modes	Sub Ch.
Channel Input Mode Switch	Yes (2/4/6 ch.)
Pass-Through Preamp Output	No
Source Channel Selection for PreOuts	N/A

 

Physical Specifications

Height (H)	2.13 in / 54 mm
Width (W)	14.66 in / 372 mm
Depth (D)	6.96 in / 177 mm
Net Weight	6.15 lb / 2.79 kg

 

RD900/5 Product Manual