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TDA7498 Class D Stereo Amplifier Board — 2×100W, 15–34V, XH-M151, 90% Efficiency
TDA7498 Class D Stereo Amplifier Board 2×100W, 15–34V, XH-M151, 90% Efficiency
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$44.24 USD
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TDA7498 Class D Stereo Amplifier Board — 2×100W, 15–34V, XH-M151, 90% Efficiency
The XH-M151 TDA7498 amplifier board is a high-efficiency Class D stereo audio amplifier delivering 2×100W (80W+80W RMS into 8Ω) from a 15–34V DC supply. Based on the STMicroelectronics TDA7498 IC, it achieves up to 90% efficiency — far superior to Class AB amplifiers — making it ideal for DIY hi-fi speaker systems, home audio amplifiers, and powered speaker builds where heat dissipation is a concern. The compact 90×64mm PCB includes all necessary filtering and protection circuitry.
Key Specifications
| Parameter | Value |
|---|---|
| IC | STMicroelectronics TDA7498 |
| Board Model | XH-M151 |
| Output Power | 2×100W (peak) / 2×80W RMS (8Ω, 15% THD) |
| Supply Voltage | 15V – 34V DC |
| Speaker Impedance | 4Ω or 8Ω |
| Efficiency | Up to 90% (Class D) |
| SNR | >100dB |
| THD+N | <0.1% (at 1W, 1kHz) |
| Frequency Response | 20Hz – 20kHz (±1dB) |
| Standby / Mute | Yes (onboard control pins) |
| PCB Dimensions | 90 × 64mm |
Class D vs Class AB Amplifier — Key Differences
| Feature | Class D (TDA7498) | Class AB |
|---|---|---|
| Efficiency | Up to 90% | 50–70% |
| Heat Generation | Low (small heatsink) | High (large heatsink) |
| Audio Quality | Excellent (>100dB SNR) | Excellent |
| Power Supply | DC 15–34V | DC or AC transformer |
| Best For | High power, compact builds | Ultra-low distortion audiophile |
Recommended Power Supply
- 4Ω speakers: 24V / 5A+ DC supply (120W+)
- 8Ω speakers: 24V / 4A DC supply (96W)
- Maximum power: 34V / 6A DC supply
- Use a regulated switching power supply (SMPS) for best performance
Why Choose TDA7498 XH-M151?
- ✅ 90% efficiency — minimal heat, small heatsink required
- ✅ 2×100W output — drives 4Ω and 8Ω speakers with authority
- ✅ >100dB SNR — audiophile-grade signal-to-noise ratio
- ✅ Compact 90×64mm PCB — fits in small speaker enclosures
- ✅ Standby / mute control — for system integration and power management
Typical Applications
- DIY hi-fi stereo speaker amplifier
- Powered bookshelf speaker build
- Home theater subwoofer amplifier
- PA system stage monitor amplifier
- Guitar cabinet power amplifier
- Bluetooth speaker amplifier board upgrade
Package Contents
- 1 × TDA7498 Class D Stereo Amplifier Board (XH-M151)
