Hifonics A1200.4D ALPHA 1200 Watt 4-Channel Amplifier
Key features
- Amplifier channels: 4
- Amplifier class: Class D
- Frequency response: 10Hz-45kHz
- High-pass crossover (12 dB/octave): 20Hz-4kHz, DUPE Mode: 10Hz-500Hz
- Low-pass crossover (12 dB/octave): DUPE Mode: 50Hz-4kHz
- Speaker-level inputs: Yes
Hifonics A1200.4D ALPHA 1200 Watt 4-Channel Amplifier is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Add four-channel amplification to a compatible 12V vehicle audio system with the Hifonics A1200.4D ALPHA 1200-watt amplifier. Its Full Range Super D-Class design, Ultra-Fi MOSFET output devices, and Accu-Cross electronic crossovers support flexible speaker and bridged configurations.
Key Features & Benefits
- Four-channel or bridged operation: Choose four-channel output or bridge two channels for a mono load.
- Super D-Class circuitry: Designed for high power efficiency, low distortion, and reduced heat compared with conventional amplifier designs.
- Ultra-Fi MOSFET devices: Built for musical output with high efficiency and minimal distortion.
- Accu-Cross crossovers: Tailor the signal sent to connected speakers and subwoofers.
- Automatic turn-on: High-level inputs detect a 6-volt DC offset from the source unit, eliminating the need for a separate remote turn-on wire when the function works with that source.
- Protection diagnostics: Illuminated indicators monitor overload and speaker-short protection.
Technical Specifications
| Brand | Hifonics |
|---|---|
| Series | ALPHA |
| Model Number | A1200.4D |
| Type | Amplifier |
| Amp Class | Full Range Super D-Class® |
| Total Channels | 4 |
| Amp Max Power | 1200 Watts |
| Amp Power @ 2 Ohms | 4 x 300 Watts |
| Amp Power @ 4 Ohms | 4 x 150 Watts |
| Amp Mono Bridged @ 4 Ohms | 2 x 600 Watts |
| Weight | 2.6 kg |
| Dimensions | 36.3 × 17.8 × 8.6 cm |
| Heatsink Dimensions | 23.5 × 23.5 × 6.0 cm |
| Frequency Response | 10Hz-45kHz |
| Total Harmonic Distortion (THD) | < 0.05% |
| Signal to Noise Ratio | > 85dB |
| Variable Voltage | 0.2-10V |
| Bass Boost | 0-12dB @ 45Hz |
| Color | Black |
| Power Terminal Wire Gauge | 4 AWG |
| Speaker Terminal Wire Gauge | 18 AWG |
| Amplifier topology and output devices | Super D-Class® circuitry; Ultra-Fi™ MOSFET power devices |
| Power supply | Twin Turbo Coil pulse width modulated power supply |
| Crossovers and equalizer | Accu-Cross electronic crossovers; onboard electronic equalizer |
| RCA inputs | Nickel-plated RCA connectors |
| Output connections | Nickel-plated, high-temperature, impact-resistant hex screw terminals; erosion resistant |
| Connection type | Secure power, ground, and speaker connections; angled for installation access |
| Heatsink | Heavy-duty aluminum alloy |
| Construction | Surface Mount Technology (SMT) |
| Auto turn-on | High-level input DC offset detection; 6 volts; stated to work with 90% of source units equipped with high-power output |
| Additional feature | 300KHZ HIGH SPEED PULSING; switching speed places amplifier sampling frequencies at over 100 times higher than human ears can hear |
| Compatibility | Universal 12V vehicle audio systems with RCA pre-amp outputs or standard high-level speaker inputs |
| Warranty | 1 Year Manufacturer Warranty |
| Downloads | Hifonics ALPHA Amplifiers (A) Quick Start Guide (Rev3); Hifonics Autosense Technical Guide (Rev3) |
Why Choose This Product?
The A1200.4D combines four channels, selectable bridged operation, and onboard crossover control in one amplifier. This gives you options when planning a system, while the nickel-plated terminals and angled connections support secure wiring and easier access during installation.
Its low-noise preamplifier circuit is designed to pass the source unit’s low-voltage signal with minimal distortion. The aluminum alloy heatsink moves heat away from the MOSFET devices, and SMT components are designed to withstand vehicle shock and vibration.
Installation & Compatibility Notes
This amplifier is specified for universal 12V vehicle audio systems with RCA pre-amp outputs or high-level speaker inputs. Check your source unit’s outputs and available mounting space against the listed amplifier and heatsink dimensions before installation.
The power and ground terminals accommodate 4 AWG wire; speaker terminals accommodate 18 AWG wire. Automatic turn-on uses DC offset detection on the high-level inputs and is stated to work with 90% of source units equipped with high-power output.
Frequently Asked Questions
How is the 1200-watt maximum power distributed?
The listed outputs are 4 x 150 watts at 4 ohms, 4 x 300 watts at 2 ohms, or 2 x 600 watts when bridged at 4 ohms.
Can I use the amplifier in bridged mode?
Yes. The specifications list 2 x 600 watts at 4 ohms in mono bridged operation.
Do I need a separate remote turn-on wire?
Not when automatic turn-on works with your source unit. The amplifier detects a 6-volt DC offset on its high-level inputs when the source powers on.
What wire gauges do the terminals support?
The power and ground terminals accommodate 4 AWG wire, and the speaker terminals accommodate 18 AWG wire.
Which source-unit connections are supported?
The amplifier supports RCA pre-amp outputs and standard high-level speaker inputs in compatible 12V vehicle audio systems.
Explore More
Want to learn more about Hifonics? Explore our Hifonics brand profile.
| Brand | Hifonics |
| Series | ALPHA |
| Model Number | A1200.4D |
| Type | Amplifier |
| Amp Class | Full Range Super D-Class® |
| Amp Total Channels | 4 |
| Amp Max Power | 1200 Watts |
| Amp Power @ 2 Ohms | 4 x 300 Watts |
| Amp Power @ 4 Ohms | 4 x 150 Watts |
| Amp Mono Bridged @ 4 Ohms | 2 x 600 Watts |
| Weight | 2.6 kg |
| Dimensions | 36.3 × 17.8 × 8.6 cm |
| Heatsink Dimensions | 23.5 × 23.5 × 6.0 cm |
| Frequency Response | 10Hz-45kHz |
| Total Harmonic Distortion (THD) | < 0.05% |
| Signal to Noise Ratio | > 85dB |
| Variable Voltage | 0.2-10V |
| Bass Boost | 0-12dB @ 45Hz |
| Color | Black |
| Power Terminal Wire Gauge | 4 AWG |
| Speaker Terminal Wire Gauge | 18 AWG |
| Feature | Description |
|---|---|
| Low Noise Preamplifier Circuit | Maximum low voltage signal from the source unit comes into the amplifier through a low voltage circuit which delivers minimal distortion through the amplification process. |
| RCA Inputs | Nickel plated RCA connectors for audiophile signal quality and maximum signal throughput with minimum distortion and maximum external noise rejection. |
| Operation Mode | Flexible installation allows this amplifier to run in four channel or bridged mono mode on 2 channels. |
| Crossover Type | Accu-Cross crossovers allow for complete control of the signal directing to all speakers. See specifications section for specific frequencies. |
| Electronic Equalizer | Control of amplifier output with on board electronic crossover to tailor specific frequencies to speakers and subwoofers. Check specifications for specific frequencies for this amplifier. |
| Class / Topology | Developed over 4 decades of engineering to deliver the highest level of sound quality and power efficiency, Hifonics ALPHA Full Range Super D-Class® circuitry results in lower distortion, higher current efficiencies and while producing less heat than conventional amplifier designs. |
| Output Device Technology | The Ultra-Fi™ MOSFET is designed for music production vs just electronics output power. It produces very musical high power with high efficiency for cooling and minimal distortion. |
| Heat Sink | Heavy duty aluminum alloy heat-sink efficiently moves heat from the MOSFET where it can be cooled. |
| Power Supply | The Twin Turbo Coil PS is a Pulse Width Modulated power supply keeps voltage constant through the Ultra-Fi output devices. |
| Output Connections | Nickel-plated, high temperature impact resistant with hex screw terminals that allow for secure connections and is erosion resistant. |
| Connection Type | Secure connection for all power, ground and speaker connections. Angled for ease of access during installation. |
| LED System Protection Circuitry Diagnostics | Monitor overload and speaker short protection with illuminated indicators on the amplifier end panel. |
| Auto Turn-On | The amplifier detects a voltage rise (6 volts) with a "DC Offset" over the connected input signal on the HIGH LEVEL INPUTS when the head unit or source unit is switched on. Thus, the amplifier will also be turned on. When the source unit is turn off the amplifier is also turned off. Using this feature eliminates the need to use the REM (turn on wire). The AUTO TURN-ON function will work with 90% of all source units because they are equipped with "high power" output. |
| Full Range Digital | Mono amplifiers focus on only subwoofer frequencies with Super D Class®, high efficiency/high power technology to deliver maximum wattage. With this focus on engineering, ALPHA delivers big sound while remaining very musical in a compact chassis is the result. |
| SMT Inside | With Surface Mount Technology the typical "through-hole" placement and the larger tolerances from human placement is dramatically improved. In addition, circuit engineers can design better circuits for power and sound quality as the tolerances of SMT components are superior to larger "through-hole" components. Because of their lower mass SMT components withstand shock and vibration making them perfect for audio designed for all vehicles. |
| Additional Features | 300KHZ HIGH SPEED PULSING: The switching speed of the Class D chip puts the amplifier sampling frequencies at over 100 times higher than human ears can hear. This means that the amplifier and the very fast digital switching remains un-hearable in the audio bandwidth for music. |
Frequently asked questions
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