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The WONDOM AA-AB32166 is a Class D stereo amplifier module based on the STMicroelectronics TDA7492P chip, designed for integration into active speakers, DIY audio systems, multimedia applications, and OEM projects. Powered by a DC voltage ranging from 10V to 26V, it is capable of delivering up to 2x19W into 8Ω at 1% THD+N and up to 2x25W into 8Ω at 10% THD+N with a 24V power supply. Its Class D architecture ensures excellent energy efficiency while minimizing heat generation. The module features a power LED, optimized thermal dissipation through the PCB's large copper areas, as well as overcurrent and thermal protection circuits for reliable operation. It includes stereo analog audio inputs and direct speaker outputs, making integration into a wide range of projects straightforward. Compact with dimensions of 3.6" x 2.7" (approximately 91 x 69mm) and equipped with four mounting points, the AA-AB32166 is a simple, efficient, and cost-effective 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 Supply (Solder Pads) |
| 5 | Stereo Speaker Output |
| 6 | 10-26V Power Supply (DC Jack or Screw Terminal) |
Technical Specifications
| Specifications | |
|---|---|
| Product Type | Amplifier Module |
| Class | Class D |
| Amplifier Chip | TDA7492P |
| Inputs | 1x Stereo Input via RCA 1x Stereo Input via Solder Pads |
| Outputs | 1x Stereo Speaker Output via Screw Terminal |
| Gain | 27dB |
| Input Sensitivity | 625mV |
| Input Impedance | 22Kohms |
| Output Power | 2x 19W @8Ω THD+N 1% 2x 25W @8Ω THD+N 10% |
| Bandwidth | 20Hz-20kHz @8Ω, ±3dB |
| THD | 0.0365% @8Ω, 1W, 1KHz 0.0837% @8Ω, 10W, 1KHz |
| Noise Level | 248.93µV |
| SNR | 91dB @19W 8Ω THD+N 1% |
| Minimum Load Impedance | 8Ω |
| General | |
|---|---|
| Power Supply | 10-26V DC (24V typ.) |
| Idle Power Consumption | 0.6-1.2W |
| Standby Power Consumption | 0.1-0.5W |
| Max. Current | 2.35A @ 50W 8Ohm |
| Efficiency | 88.7% @ 25W 8Ohm |
| Switching Frequency | 350kHz |
| Dimensions | 91 x 69 x 1.7mm |
| Weight | 166g / 0.37 lbs (±10%) |
| Package Contents | 1x WONDOM AA-AB32166 |
| Input | Solder pad |
| Input | RCA |
| Output | Screw terminals |
| Channel | 2 (Stereo) |
| Class | Class D / T |
| Amplifier chip | TDA7492P |
| Power (W) | 19.0 |