JL Audio
XDM800/8-24V
800W RMS 8-Channel Amplifier for 24V Systems
Overview
The ultra-versatile XDM800/8-24V delivers eight channels of crystal-clear, full-range power and is capable of delivering a whopping 100 watts to each of its channels @ 2 ohms (28.8V, 1% THD). The technology that makes this much power possible in such a compact chassis is our advanced NexD™ high-speed switching design, which permits full bandwidth Class D operation with extremely low distortion and remarkable efficiency.
Suitable for car or boat installations, the XDM800/8-24V is built with marine-grade materials and features an exclusive, dual-mode input filter for noise-free performance in boats or cars. Automatic turn-on capability (via signal sensing or DC-offset sensing) is also onboard for easy factory system upgrades.
The XDM800/8-24V includes a 12 dB / octave filter for each channel bank, which can be configured as a low-pass or high-pass filter, and offers continuously variable cutoff frequency selection from 50-500 Hz. With the addition of an optional HD-RLC or MHD-RLC (water-resistant) remote level controller (each sold separately), you have the ability to adjust the level of two, four, or all eight amplifier channels directly from the driver's seat or cockpit.
Here are a few examples of how the XDM800/8-24V can be used:
- Eight-channel Satellite Amp: drive four pairs of speakers with 75W x 8
- Big Four-Channel Satellite Amp: bridge to produce 200W x 4 @ 4Ω
- Six-Channel System Amp: drive front and rear satellites with 75W x 4 @ 4Ω, plus two 4Ω subwoofers with 200W each
- Staggered Six-Channel Satellite Amp: drive front speakers with 200W x 2 @ 4Ω, plus four 4Ω speakers with 75W each
- Staggered Five-Channel Satellite Amp: drive three front speakers with 200W @ 4Ω + rear speakers with 75W x 2
- Four-Channel System Amp: drive left and right speakers with 200W x 2 @ 4Ω, plus two 4Ω subwoofers with 200W each
Finished in a sleek, black powder-coat, all controls are protected beneath a gasketed, removable top cover for easy access.
This amplifier is designed for operation in vessels with 24 volt, negative-ground electrical systems. Use of this product in vessels with positive ground and/or voltages other than 24 volt may result in damage to the product and will void the warranty.
NexD™ Switching Technology
Beginning with the original 'Slash' subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. Our NexD™ switching technology stems from our Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.
Let's get a little nerdy... A traditional PWM switching amp design uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes some ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real, in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping. The cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amps, but not for full-range amplifiers.
Taking the above into account when designing the NexD™ subwoofer amplifiers, we have taken the simple fixed PWM approach and enhanced it with a very high switching frequency: 240 kHz, which is about 4x higher than most Class D subwoofer amplifiers. This pushes the amplifier's bandwidth to at least 500 Hz with minimal distortion and improves efficiency, while keeping typically bulky circuity more compact. Your subwoofers will reward you with tight, rock-solid bass performance.
For the full-range NexD™ amplifiers and channels we applied a variable, ultra-high speed version of the NexD™ technology (switching at well over 400 kHz). In these designs, a self-oscillating modulator with "feed-forward" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design. The bottom line is simply great audio: clean, powerful and reliable.
Advanced Rollback Protection
Should a JL Audio amplifier equipped with Advanced Rollback Protection reach an unsafe operating temperature, a special circuit rolls back peak power output, without changing gain, until the amplifier cools down to a safe operating temperature. The condition is generally indicated by a red “Thermal” or “Status” LED state. On VXI amplifiers, the LED ring will flash red. Once the amplifier cools down, the circuit restores full peak power output and the indicator reverts to its normal state. The operation of Advanced Rollback Protection is inaudible in most cases, but it ensures that your music keeps on playing, even under the most demanding conditions.
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.
Compatibility
Remote Level Controllers
Specifications
General
Power
Signal Processing
Dimensions
Brand | JL Audio |
---|---|
Amplifier Class | Class D |
RMS Power | 800W RMS |