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The WONDOM AA-AB32992 is a compact Class D stereo amplifier module built around the Maxim Integrated MAX9736A chip. Designed for DIY audio projects, active speakers, multimedia systems, and OEM integrations, it delivers up to 2x 12W into 8Ω with excellent energy efficiency of up to 88%, reducing heat generation and the need for large heatsinks. The MAX9736A features a filterless Class D architecture, operates from a power supply ranging from 8V to 28V DC, offers high PSRR to minimize sensitivity to power supply noise, and includes overcurrent and thermal protection. The module provides analog stereo audio inputs and differential speaker outputs, ensuring easy integration into a wide range of audio projects. Its spread-spectrum modulation helps reduce EMI emissions, while the integrated Mute and Shutdown functions simplify power management and minimize switching noise. Compact, with dimensions of approximately 91 x 69mm (3.6" x 2.7"), the AA-AB32992 is a cost-effective and high-performance solution for building low- to medium-power stereo audio amplifiers.


| 1 | Stereo RCA Analog Input |
| 2 | Stereo Analog Input via Solder Pads |
| 3 | MUTE/STBY (Solder Pad) |
| 4 | 10-26V Power Input (Solder Pads) |
| 5 | Stereo Speaker Output |
| 6 | 10-26V Power Input (DC Jack or Screw Terminal) |
Technical Specifications
| Specifications | |
|---|---|
| Product Type | Amplifier Module |
| Class | Class D |
| Amplifier Chip | MAX9736A |
| Inputs | 1x Stereo Input via RCA 1x Stereo Input via Solder Pads |
| Outputs | 1x Stereo Speaker Output via Screw Terminal |
| Gain | 31dB |
| Input Sensitivity | 307mV |
| Input Impedance | 22Kohms |
| Output Power | 2x 12W @8Ω THD+N 1% 2x 15W @8Ω THD+N 10% |
| Bandwidth | 20Hz-20kHz @8Ω, ±3dB |
| THD | 0.0495% @8Ω, 1W, 1kHz 0.2875% @8Ω, 10W, 1kHz |
| Noise Level | 239µV |
| SNR | 89.4dB @12W 8Ω THD+N 1% |
| Minimum Load Impedance | 8Ω |
| General | |
|---|---|
| Power Supply | 10-28V DC (24V typ.) |
| Idle Power Consumption | 0.6-1.5W |
| Standby Power Consumption | 0.01-0.1W |
| Max. Current | 1.5A @ 30W 8Ω |
| Efficiency | 87.2% @ 15W 8Ω |
| Switching Frequency | 290kHz |
| Dimensions | 91 x 69 x 1.7mm |
| Weight | 170g / 0.37lbs (±10%) |
| Package Contents | 1x WONDOM AA-AB32992 |
| Input | Solder pad |
| Input | RCA |
| Output | Screw terminals |
| Channel | 2 (Stereo) |
| Class | Class D / T |
| Amplifier chip | MAX9736A |
| Power (W) | 12.0 |