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The WONDOM GAU1 (AA-AS43111) is a 2.1-channel amplifier specifically designed for arcade cabinets, racing simulators, gaming machines, and multimedia applications requiring a powerful, compact, and easy-to-integrate audio solution. Based on a Texas Instruments TPA3116 amplifier combined with an integrated audio DSP, it delivers up to 2x50W into 4Ω for the stereo channels and 1x100W into 2Ω for the subwoofer channel, all powered from a 24V DC supply. The GAU1 supports Bluetooth and analog line inputs, while its front-panel USB-C port allows advanced real-time configuration from a PC. Users can adjust equalization, Bass Boost, crossover frequency, delays, and other DSP parameters directly through the dedicated software interface. External controls also allow volume, balance, bass level, crossover, power, and Bluetooth disconnect management without the need for a computer. Its sandblasted aluminum enclosure ensures excellent heat dissipation, while its locking Mini-Fit and Micro-Fit connectors guarantee quick and secure installation. The GAU1 also integrates extensive protections against overvoltage, undervoltage, overheating, short circuits, and DC offset detection, as well as a dedicated grounding terminal designed to eliminate ground-loop noise for clear, interference-free sound reproduction.

Designed to deliver an immersive audio experience, the GAU1 combines two 50W stereo channels into 4Ω with a 100W bass channel into 2Ω. This 2.1 architecture accurately reproduces sound effects, music, dialogue, and low frequencies in arcade cabinets, racing simulators, and entertainment systems. Explosions, impacts, environmental effects, and soundtracks all benefit from dynamic and detailed playback.

Thanks to its integrated DSP processor, the GAU1 allows advanced audio processing adjustment via its USB-C port. The dedicated software interface enables real-time control of numerous parameters such as equalization, Bass Boost, crossover settings, delays, and output levels. Configurations can be saved and reloaded, making it easy to replicate the same sound profile across multiple machines.

The GAU1 features a compact 110 x 100 x 25mm format with cooling fins and mounting points for easy integration into confined spaces. Its locking Mini-Fit and Micro-Fit connectors prevent wiring mistakes and provide excellent vibration resistance. The aluminum enclosure also acts as a heatsink, while integrated protections against overvoltage, undervoltage, overheating, short circuits, and DC offset ensure safe and long-lasting operation. Finally, the dedicated ground terminal effectively eliminates ground-loop noise to preserve audio quality.


| 1 | Mini-Fit 2x1 Subwoofer Output |
| 2 | Micro-Fit 2x1 Stereo L/R Output |
| 3 | 12-24V Mini-Fit 2x2 Power Input |
| 4 | External Control Port (JST PH 2x6 Pin) |
| 5 | Grounding Ring Terminal Mounting Point |
| 6 | C-Bracket Screw Terminals |
| 7 | PC User Interface Programming Port (USB Type-C) |
| 8 | 3.5mm Line Output |
| 9 | 3.5mm Line Input |
Technical Specifications
| Specifications | |
|---|---|
| Product Type | Amplifier |
| Class | Class D |
| Number of Channels | 2.1 |
| Amplifier Chip | TPA3116 |
| DSP | |
| Input | 1x 3.5mm Line Input Bluetooth |
| Outputs | 1x Stereo L/R Micro-Fit 2x1 Output 1x Mini-Fit 2x1 Subwoofer Output 1x 3.5mm Output |
| Output Power | 2x50W + 1x100W @ 4/2 Ohm |
| Gain | L/R: 27.7dB Sub: 32.3dB |
| SNR | L/R: 111.7dB Sub: 102.4dB |
| THD+N | L/R: 0.18% Sub: 0.007% |
| Noise Level | L/R: 33.95uVrms Sub: 152.6uVrms |
| Input Sensitivity | 775mVrms |
| Minimum Load Impedance | L/R: 4 Ohm Sub: 2 Ohm |
| General | |
|---|---|
| Power Supply | 12-24V DC |
| Idle Current Consumption (24V DC, No Signal) | 0.118A / 0.128A / 0.156A |
| Idle Power Consumption (24V DC, No Signal) | 3.7W |
| Dimensions | 100 x 110mm |
| Weight | 280.8g ±10g |
| Package Contents | 1x AA-AS43111 GAU1 2.1 Gaming Amplifier 1x MiniFit 2X1CKT Cable for Subwoofer Output, 50cm / 19.69" 1x MicroFit 1X2CKT Cable for Right Channel Output, 50cm / 19.69" 1x MicroFit 2X1CKT Cable for Left Channel Output, 50cm / 19.69" 1x MiniFit 2X2CKT Power Cable, 50cm / 19.69" 1x Aluminum Cable Mounting Bracket |
| Input | Bluetooth |
| Input | Jack 3.5mm |
| Output | Micro-fit |
| Output | Mini-fit |
| Output | Jack 3.5mm |
| Max sampling rate | NC |
| Color | Black |
| Channel | 2.1 |
| Class | Class D / T |
| Amplifier chip | TPA3116D2 |
| Power (W) | 100.0 |
| Power (W) | 50.0 |
| Remote Control | No |