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4 Ch. Class D Full-Range Amplifier, 400 W

JL Audio RD4004

Quick Specs

  • Type: Amplifiers
  • Energy Star Rated: No
 

4-Channel Class D Full-Range Amplifier, 100 W x 4 @ 2 / 75 W x 4 @ 4 - 14.4V


Utilizing our exclusive NexD™ high-speed switching technologies, the ultra-compact RD400/4 amplifier is engineered to deliver loads of audio output power, with incredible efficiency and low distortion. Don t let its modern styling and small size fool you though, this little powerhouse churns out 100 watts of crystal-clear audio from each of its four channels into 2 ohms (14.4V, 1% THD) and is fully bridgeable, so it can be used as a 3-channel amplifier, or as a 2-channel amplifier producing a whopping 200W x 2 into 4 ohms.

For your convenience, the RD400/4 s controls can be found on top of the amplifier, beneath a protective cover, with all connections located along one side of its chassis. Studio-grade signal processing features include high or low-pass 12 dB / octave filters (defeatable) for each channel pair, with continuously variable frequency selection from 50-500 Hz, and dual-range, differential-balanced inputs capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard equipment, along with all-new input type switches for bridging of stereo output channels without needing to use Y-adaptors.

Onboard LED-clipping indicators are also included with your RD400/4. This all-new, innovative feature lets you easily set your amplifier s input sensitivity settings, quickly and accurately, with no special equipment needed. You ll also find a set of preamp outputs on-hand, so you can pass signals to another amplifier, almost effortlessly. The RD400/4 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition.


Technology

NexD™ Switching Technology

NexD™ amplifier technologies produce exceptional audio quality, unsurpassed total efficiency and high power from very compact amplifier designs.


Differential-Balanced Inputs

JL Audio s Differential-Balanced Inputs are engineered to combat induced cable noise, which is a common problem in car and marine audio installations. This technology allows for the use of conventional RCA cables, while delivering many of the benefits of a true balanced connection and accepting a wide range of input signal levels.


Rated Continuous (RMS) Power @ 14.4 V
@ 4 75 W RMS x 4
@ 2 100 W RMS x 4
Bridged @ 4 200 W RMS x 2
Rated Continuous (RMS) Power @ 12.5 V
@ 4 60 W RMS x 4
@ 2 90 W RMS x 4
Bridged @ 4 180 W RMS x 2
General Specifications
Frequency Response 12 Hz - 22 kHz (+0, -1dB)
S/N Ratio, referred to highest rated power >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 >150 / 50 Hz
Damping Factor @ 2 >75 / 50 Hz
THD+N @ Rated Power <1% @ 2 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 40 A (AFS, AGU or MaxiFuse™)
Signal Processing
Filter Mode(s) Low-Pass or High-Pass
Filter Slope(s) 12 dB/octave
Filter Frequency Range 50 Hz - 500 Hz
Detented, Calibrated Filter Freq. Potentiometers No
Filter Defeat Function Yes
Remote Level Control No
Remote Level Modes N/A
Channel Input Mode Switch Yes (2/4 ch.)
Pass-Through Preamp Output Buffered
Source Channel Selection for PreOuts No
Physical Specifications
Height (H) 2.13 in / 54 mm
Width (W) 9.78 in / 248 mm
Depth (D) 6.96 in / 177 mm

Quick Specs


  • Appearance

  • Type: Amplifiers

  • Features

  • Energy Star Rated: No

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Electronics can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.