The Hifonics A1200.1D Alpha is a mono car audio amplifier built to power a subwoofer system. Its single-channel design suits a dedicated bass section in a vehicle. It is intended for universal installation with compatible wiring, a source signal, and a properly matched subwoofer load.
It is rated at 325 watts at 4 ohms, 600 watts at 2 ohms, and 1,200 watts at 1 ohm. The amplifier uses Hifonics Super D-Class circuitry and Ultra-Fi MOSFET output devices. A pulse-width-modulated Twin Turbo Coil power supply and a heavy-duty aluminum alloy heat sink help manage heat.
Tuning controls include a variable low-pass crossover, a subsonic filter, adjustable bass boost, and variable phase. A wired HFR-31 bass remote is included for adjustment from the cabin. The amplifier accepts speaker-level input and can turn on automatically through DC offset on its high-level inputs, without a remote wire.
- Type
- Mono (single-channel) car subwoofer amplifier
- Series
- Alpha
- Rated power
- 325 W at 4 ohms, 600 W at 2 ohms, 1,200 W at 1 ohm
- Minimum load
- 1 ohm
- Circuitry
- Hifonics Super D-Class, Ultra-Fi MOSFET output devices
- Power supply
- Pulse-width-modulated Twin Turbo Coil
- Low-pass crossover
- Variable, 30-250 Hz
- Subsonic filter
- 10-50 Hz
- Bass boost
- 0 to 12 dB at 45 Hz
- Phase
- Variable, 0 to 180 degrees
- Input sensitivity
- 0.2-6 V
- Inputs
- Speaker-level input, DC-offset auto turn-on via high-level inputs
- Heat sink
- Heavy-duty aluminum alloy
- Terminals
- Nickel-plated, high-temperature, hex-screw
- Power/ground cable
- Accepts 4 AWG
- Speaker cable
- Accepts 14 AWG
- Protection
- LED indicators for overload and speaker short
- Fuse
- External fuse required
- In the box
- HFR-31 wired bass remote