Alpine HDA-M80

Features

Design: The Alpine HDA-M80 is a mono amplifier, dedicated to driving subwoofers. It is stable down to 2Ω.

Class D Amplifier Design: The amplifier design is Class D, which uses digital switching power supplies. The result is the amplifier runs more efficiently, generating less heat than Class AB amps.

Power Specifications:

• 4Ω: 500 watts RMS x 1
• 2Ω: 800 watts RMS x 1

Hidden Controls: All the amplifier's audio controls are hidden under a removable top panel:

• Gain: rotary gain control
• Crossovers: separate crossover controls for the front, rear, and sub channels
  • LP Filter: rotary frequency control; variable from 50 Hz to 400 Hz; 24 dB/octave slope; the low pass filter is always engaged (it cannot be bypassed)
  • Sub Sonic: rotary frequency control; variable from 8 Hz to 40 Hz; 24 dB/octave slope; used to remove extremely low frequencies that can't be cleanly reproduced by the subwoofer
• Bass EQ: increase the subwoofer channel bass level between 0dB and +12dB via the rotary control; centered at 50 Hz

Optional Remote Bass Control: The amplifier has an RJ-25 modular jack for adding an optional wired remote to control the bass output level, RUX-KNOB.2 or RUX-H01, both sold separately. Both have a 20dB adjustment range.

Terminal Layout: For wiring convenience, all of the inputs and outputs on the amplifier are on one side.

Quick Connect Plugs: The Alpine Status series amplifiers use 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 are tightened/loosened using the supplied hex wrenches. 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-gauge (recommended) wire, while the remote terminal will accept up to 12-gauge. The quick connect plug for connecting the speaker wires has terminals for two speakers, which allows you to easily connect two subwoofers or a single dual voice coil sub. The speaker terminals will accept up to 12-gauge wire.

Audio Input: There are stereo 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.

Input Level: There is a 2-position switch to choose the input level range for the RCA inputs; High (400 mV-10 V) or Low (100 mV-4 V).

Fuses: The amp is equipped with three 30-amp ATO fuses; a 90-amp (minimum) external fuse should be placed on the +12V power wire within 18" of the battery.