S220H/S350H 2.1-Ch Bluetooth 5.1 Amplifier Board

Q: What is the difference between the S220H and S350H amplifier boards?

The S220H uses a TDA7498 amplifier chip and delivers up to 160W×2 for stereo channels plus 220W for the subwoofer (at 36VDC). The S350H uses a more powerful TPA3251D2 chip, outputting up to 220W×2 for stereo and 350W for the subwoofer (at 36VDC), and includes an active heatsink + fan cooling system for sustained high-power use. Both share the same Bluetooth 5.1, multi-input support, and protection features.

Q: What audio inputs do these amplifier boards support?

Both the S220H and S350H support four audio input options: Bluetooth 5.1 wireless streaming, a standard AUX (3.5mm) input, a USB flash drive for playing audio files directly, and a USB sound card for connecting to a PC or laptop.

Q: What power supply do I need for these amplifier boards?

The S220H requires a DC 12–38V / 10A (or higher) power supply — a 15V or higher supply is recommended for best performance. The S350H requires a DC 18–38V / 10A (or higher) power supply. Note: the power supply is not included and must be sourced separately. For maximum rated output, use a 36V DC supply.

Q: Can I control these boards with a smartphone app?

Yes! Both boards support the Sinilink (Xinyilian) App, which lets you customize the Bluetooth device name, set a Bluetooth password for security, and enable or disable notification tones — all from your smartphone.

S220H/S350H 2.1-Ch Bluetooth 5.1 Amplifier Board | 350W Sub

S220H

$145.91

$145.91 $179.17

S220H/S350H 2.1-Ch Bluetooth 5.1 Amplifier Board | 350W Sub

$145.91

$145.91 $179.17

S220H / S350H 2.1-Channel Bluetooth 5.1 Amplifier Board – High-Power Stereo Subwoofer

Take your audio setup to the next level with the diymore S220H / S350H 2.1-Channel Bluetooth 5.1 Amplifier Board. Available in two powerful configurations — 160W×2 + 220W (S220H) and 220W×2 + 350W (S350H) — these compact amplifier modules deliver rich, full-range Hi-Fi sound with deep, punchy bass. Whether you're building a custom home speaker system, upgrading your workshop audio, or DIY-ing a high-power sound enclosure, these boards pack serious performance into a sleek, compact form factor.

Made in Mainland China.

Choose Your Model

S220H – 160W×2 + 220W Subwoofer

Chip: TDA7498 amplifier IC
Power Supply: DC 12–38V / 10A or higher (15V+ recommended)
Max Output (L/R): 160W / 4Ω at 36VDC | 80W / 8Ω at 36VDC
Max Subwoofer Output: 220W / 3Ω at 36VDC
Bluetooth Version: 5.1
Audio Inputs: Bluetooth + AUX + USB Flash Drive + USB Sound Card
Audio Outputs: Left & Right Channels + Subwoofer
Frequency Range: 20Hz – 20kHz
Volume Control: 360° stepless rotary encoder knob (smooth feel, one-touch start/stop, long-press power on/off)
App Control: Xinyilian / Sinilink App (Bluetooth name, password, notification tones)
Protection: Overvoltage, undervoltage, clipping, short circuit, overheating
Dimensions: 134mm × 126mm × 26mm
Weight: 365g
Certifications: CE, RoHS

S350H – 220W×2 + 350W Subwoofer

Chip: TPA3251D2 amplifier IC
Power Supply: DC 18–38V / 10A or higher
Max Output (L/R): 220W / 3Ω at 36VDC | 175W / 4Ω at 36VDC | 100W / 8Ω at 36VDC
Max Subwoofer Output: 350W / 2Ω at 36VDC
Bluetooth Version: 5.1
Audio Inputs: Bluetooth + AUX + USB Flash Drive + USB Sound Card
Audio Outputs: Left & Right Channels + Subwoofer
Frequency Range: 20Hz – 20kHz
Volume Control: High-end rotary encoder knob with smooth operation
Cooling: Heatsink + fan cooling system for sustained high-power operation
Hi-Fi Quality: High-definition, low-distortion audio
App Control: Sinilink App (Bluetooth name, password, notification tones)
Protection: Overvoltage, undervoltage, clipping, short circuit, overheating
Dimensions: 130mm × 116mm × 27mm
Weight: 370g
Certifications: CE, RoHS

Key Features at a Glance

🎵 Bluetooth 5.1 for stable, low-latency wireless audio streaming
🔊 2.1-channel output — dual stereo channels + dedicated subwoofer output
🎛️ Multiple audio inputs — Bluetooth, AUX, USB flash drive, USB sound card
🛡️ Multi-layered protection — overvoltage, undervoltage, clipping, short circuit & overheating safeguards
📱 App-controlled via Sinilink/Xinyilian App for Bluetooth customization
⚙️ Premium encoder knob — 360° stepless volume control as seen in high-end amplifiers
❄️ Active cooling (S350H) — heatsink + fan for worry-free high-power sessions

What's in the Box?

S220H: 1× 2.1-Channel TDA7498 Bluetooth Amplifier Board Module
S350H: 1× TPA3251D2 Bluetooth Amplifier Board Module

A: The S220H uses a TDA7498 amplifier chip and delivers up to 160W×2 for stereo channels plus 220W for the subwoofer (at 36VDC). The S350H uses a more powerful TPA3251D2 chip, outputting up to 220W×2 for stereo and 350W for the subwoofer (at 36VDC), and includes an active heatsink + fan cooling system for sustained high-power use. Both share the same Bluetooth 5.1, multi-input support, and protection features.

Q: What audio inputs do these amplifier boards support?

A: Both the S220H and S350H support four audio input options: Bluetooth 5.1 wireless streaming, a standard AUX (3.5mm) input, a USB flash drive for playing audio files directly, and a USB sound card for connecting to a PC or laptop.

Q: What power supply do I need for these amplifier boards?

A: The S220H requires a DC 12–38V / 10A (or higher) power supply — a 15V or higher supply is recommended for best performance. The S350H requires a DC 18–38V / 10A (or higher) power supply. Note: the power supply is not included and must be sourced separately. For maximum rated output, use a 36V DC supply.

Q: Can I control these boards with a smartphone app?

A: Yes! Both boards support the Sinilink (Xinyilian) App, which lets you customize the Bluetooth device name, set a Bluetooth password for security, and enable or disable notification tones — all from your smartphone.

Q: Are these amplifier boards protected against electrical faults?

A: Absolutely. Both models feature comprehensive built-in protection including overvoltage, undervoltage, clipping, short circuit, and overheating protection, making them suitable for safe, long-term use in DIY speaker enclosures and custom audio builds.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.