About the Alpine X-A90M
Alpine's X-Series X-A90M subwoofer amplifier will sharpen the focus of your music's bass image — it'll sound like the bass and kick drum are playing inside your car. This mono amp puts out up to 900 watts RMS of sub-pounding power, making it a perfect match for an Alpine X-Series 10" or 12" subwoofer. Speaker-level inputs allow you to add this amp to almost any system, even one with a factory radio.
High-tech Class-D innards
Beefy internal components and the cleverly designed Thermal Flow chassis help the amp produce its power efficiently, with little excess heat or stress to your vehicle's electrical system. Alpine designed this amp to exert tight control over subwoofer cones, so you'll experience realistic bass. A special comparator circuit corrects the output using the original input signal, minimizing phase issues for precise, high-fidelity sound.
Hidden controls and plug-in connectors
The amp's tuning controls sit protected under a removable top panel. Nifty speaker and power wire plugs make it easy to install or remove the amp, while ensuring a tight connection. Gold-plated RCA inputs, outputs, and power connections resist corrosion and signal degradation. For a creative touch, you can paint the amp's trim panels to match or contrast with your vehicle's interior decor. An optional wired remote lets you tweak your sub's volume from the front seat.
- mono subwoofer amplifier
- 600 watts RMS x 1 at 4 ohms (900 watts RMS x 1 at 2 ohms)
- CEA-2006 compliant
- Class-D amplifier technology
- frequency response: (+0/-1 dB) 10 to 300 Hz
- variable low-pass filter (50-400 Hz, 24 dB/octave)
- switchable subsonic filter (off, 15 Hz, 30 HZ)
- optional RUX-KNOB.2 wired remote level control
- preamp and speaker-level inputs
- speaker-level inputs require speaker wire to RCA adapters
- RCA preamp outputs
- quick-connect speaker connector fits wire up to 8-gauge
- fuse rating: 30A x 3
- wiring and hardware not included with amplifier
- 4-gauge power and ground wire recommended
- 10"W x 2"H x 8"D
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # X-A90M
What's in the box:
- Mono amplifier
- Two 35A ATO fuses (installed)
- Terminal Cover Left
- Terminal Cover Right
- Terminal Cover Front
- Battery connector plug
- 2 Speaker connector plugs
- Logo Plate (self-adhesive)
- 4 Self-tapping screws (Length 3/4")
- 2mm Allen wrench
- 4mm Allen wrench
- Owner's Manual
- Alpine Verification Certificate
- Limited Warranty
- To Customers sheet
- Thank you note
Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.
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More details on the Alpine X-A90M
Features & specs
|RMS Power Output (Watts x Channels)||
600 x 1 |
|Peak Power Output (Watts x Channels)||N/A|
|Power at 2 Ohms (Watts x Channels)||900 x 1|
|Bridged Power (Watts x Channels)||---|
|Minimum Impedance Bridged||---|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||8-400 Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||83 dB|
|Low-Pass Crossover Frequency||50-400 Hz|
|Low-Pass Slope (dB/octave)||24 dB/octave|
|High-Pass Crossover Frequency||N/A|
|High-Pass Slope (dB/octave)||N/A|
|Bass Boost||0-12 dB|
|Bass Boost Frequency||50 Hz|
|Speaker Level Inputs||RCA|
|Preamp Outputs||1 pair|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
X-Series Amplifiers: Alpine's X-Series amplifiers are designed for high performance, low distortion, power, and reliability. With Alpine ID (Image Defined), this Class-D amplifier delivers the imaging and sound stage depth that has been missing in most car audio systems. Alpine's proprietary circuit design provides the cleanest possible signal path, plus a dual-feedback loop, to meet and exceed the audio standard for High Resolution playback (full range amps only). The solid cast aluminum heat sink keeps the amplifier cool, even at peak power levels. Each X-Series amplifier comes with its own Alpine Verification Certificate, showing the tested power output at 2Ω at 14.4 DC voltage.
Channel Design: The Alpine X-A90M is a mono amplifier, dedicated to driving subwoofers. It is stable down to 2Ω.
CTA 2006 Compliant: The X-A90M's power ratings are measured according to the strict standards dictated by the Consumer Technology Association (CTA). These standards allow you to accurately compare the rated power output of all CTA 2006-compliant amplifiers, even if they come from different brands. Manufacturers who adhere to the standards can display the CEA 2006 logo on their products and packaging. The CTA 2006 power output specs for the X-A90M are:
- 4Ω: 600 watts RMS x 1 @ 14.4 Volts
- 2Ω: 900 watts RMS x 1 @ 14.4 Volts
Frequency Response: The Alpine X-A90M has the following frequency response:
- +0/-3 dB (1W into 4Ω): 8 Hz - 400 Hz
- +0/-1 dB (1W into 4Ω): 10 Hz - 300 Hz
Terminal Covers: The X-Series amps each have removable silver terminal covers on the front and sides that improve the appearance of the amplifier. Once you have made all of the connections and confirmed proper operation, you can attach the terminal covers by snapping them into place.
Logo Badge: The top of the amplifier features four bright white LEDs that glow when the unit is powered on. A self-adhesive Alpine Logo Badge is provided for placement over the LEDs so that the logo glows blue when lit. You can choose the orientation of the logo depending upon the installation.
Hidden Controls: The amplifier's controls are hidden behind a removable top panel. The panel can be lifted by removing two hexagon screws with the supplied 2mm Allen wrench.
Gain Control: The X-A90M's rotary gain control lets you set the amplifier's gain according to the level of the incoming signal. The amp will accept low level signals from 0.1V to 4.0V, or high level signals from 0.5V to 10V. An input level switch on the front panel should be set to match the type of input signal used.
Crossover: The Alpine X-A90M offers a Low-Pass Filter with a variable cutoff frequency of 50Hz to 400Hz. The Subsonic Filter cuts off super-low frequencies that the subwoofer cannot cleanly reproduce. The cutoff frequency is variable from 8Hz to 40Hz. Both filters have a slope of 24dB per octave.
Bass EQ: The amplifier has a variable Bass EQ (or Bass Boost) circuit that raises the level of the amplifier output at 50Hz from 0dB to +12dB.
Optional Remote Bass Control: The amplifier has an RJ-25 modular jack for adding the optional RUX-KNOB.2 Remote Bass Level Control for controlling the amp output remotely. The RUX-KNOB.2 has a 20dB range of linear adjustment.
Terminal Layout: For wiring convenience, all of the inputs and outputs on the amplifier are on one side.
Quick Connect Plugs: The X-Series amplifier uses quick connect plugs to attach your system's speaker wires and power cables to the amp for a simple, error-free installation. The quick connect plugs have set screw terminals that can be tightened/loosened by the supplied hex wrenches (2mm or 4mm). The power, ground, and remote turn-on connections are made to a single quick connect plug. The power and ground terminals will accept up to 4 AWG (recommended) wire, while the remote terminal will accept up to 12 AWG. The speaker output plug has terminals for two speakers which allows you to connect two subwoofers or a single dual voice coil sub. The speaker terminals will accept up to 8 AWG wire.
Input: The Alpine X-A90M is equipped with one pair of RCA jacks for connecting low-level or high-level input signals. If connecting the source unit's speaker wire to the input jacks, you can use a Speaker-to-RCA adapter or splice an RCA plug onto the speaker wire. When using a high-level input signal, it may not be necessary to connect a remote turn-on lead because of the amplifier's remote sensing function.
Pre-Output: A second pair of RCA jacks provides a line level output for sending a signal to a second subwoofer amplifier. The output matches the input signal, and is not affected by the amplifier's crossover.
Fuses: The Alpine X-A90M is equipped with three 30-amp ATO fuses. A 90A external fuse should be placed on the +12V power wire within 18" of the battery.
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