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5-Channel Class D System Amplifier, 100 W x 4 + 500 W x 1
Thanks to its ability to act as a "one-box solution", the HD900/5 is ideal for installations where space is at a premium and sound quality is the paramount goal.
While extremely compact, this amazing amplifier will comfortably drive a complete high-performance car audio system: that is, four satellite speaker systems and a subwoofer system... with a very serious 900 watts of power!
Using our Single Cycle Control switching design and R.I.P.S. technology, the HD900/5 delivers 100 W x 4 to its four main channels, plus a very meaty 500 W to its subwoofer channel. Thanks to R.I.P.S., high power can be delivered over a wide range of load impedances, while the tight power supply regulation keeps distortion down, maximizing sound quality. From a pure sound quality perspective, we invite you to compare the real-world, in-car performance of this amplifier to any other amplifier on the market, of any type, at any price.
This amplifier features a brushed aluminum finish with black powder-coated cast alloy heat sinks and bottom panel. A black powder-coated, gasketed cover is also provided to protect the controls.
| Main Channels @ 4 ohms | 100 W RMS x 4 |
| Main Channels @ 3 ohms | 75 W RMS x 4 |
| Main Channels @ 2 ohms | 75 W RMS x 4 |
| Main Channels @ 1.5 ohms | 75 W RMS x 4 |
| Main Channels - Bridged @ 8 ohms | 200 W RMS x 2 |
| Main Channels - Bridged @ 4 ohms | 150 W RMS x 2 |
| Subwoofer Channel @ 4 ohms | 500 W RMS x 1 |
| Subwoofer Channel @ 3 ohms | 500 W RMS x 1 |
| Subwoofer Channel @ 2 ohms | 500 W RMS x 1 |
| Subwoofer Channel @ 1.5 ohms | 500 W RMS x 1 |
| Main Channels @ 4 ohms | 100 W RMS x 4 |
| Main Channels @ 3 ohms | 75 W RMS x 4 |
| Main Channels @ 2 ohms | 75 W RMS x 4 |
| Main Channels @ 1.5 ohms | 75 W RMS x 4 |
| Main Channels - Bridged @ 8 ohms | 200 W RMS x 2 |
| Main Channels - Bridged @ 4 ohms | 150 W RMS x 2 |
| Subwoofer Channel @ 4 ohms | 500 W RMS x 1 |
| Subwoofer Channel @ 3 ohms | 500 W RMS x 1 |
| Subwoofer Channel @ 2 ohms | 500 W RMS x 1 |
| Subwoofer Channel @ 1.5 ohms | 500 W RMS x 1 |
| Frequency Response (Main Channels) | 12 Hz - 28 kHz (+0, -1dB) |
| Frequency Response (Subwoofer Channel) | 12 Hz - 10 kHz (+0, -1dB) |
| S/N Ratio, referred to highest rated power (Main Channels) | >108.5 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| S/N Ratio, referred to 1 W (Main Channels) | >88.2 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| Damping Factor @ 4 ohms | >400 / 50 Hz |
| Damping Factor @ 2 ohms | >200 / 50 Hz |
| THD+N @ Rated Power (Main Channels) | <0.03% @ 4 ohms |
| THD+N @ Rated Power (Subwoofer Channel) | <0.05% @ 4 ohms |
| 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 | Accepts up to 4 AWG wire |
| Fuse Rating | 60 A (AFS, AGU or MaxiFuse™) |
| Filter Mode(s): Channels 1 & 2 (front) | High-Pass only |
| Filter Slope(s): Channels 1 & 2 (front) | 12/24 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) | 12/24 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 | 12/24 dB/octave |
| Filter Frequency Range: Subwoofer Channel | 50 Hz - 500 Hz |
| Detented, Calibrated Filter Freq. Potentiometers | Yes |
| Filter Defeat Function | Yes |
| Infrasonic Filter: Subwoofer Channel | 30 Hz, Defeatable |
| Remote Level Control | Optional (HD-RLC) |
| Remote Level Modes | Sub Ch. only |
| Channel Input Mode Switch | Yes (2/4/6 ch.) |
| Pass-Through Preamp Output | None |
| Source Channel Selection for PreOuts | N/A |
| Height (H) | 1.93 in / 49 mm |
| Width (W) | 10.74 in / 273 mm |
| Depth (D) | 7.85 in / 199 mm |
| Net Weight | 6.85 lb / 3.11 kg |
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