S350HS TPA3251 Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W

TPA3251 2.1-channel amplifier board

The S350HS board uses two TPA3251 chips to drive a stereo pair at 220 W each and a subwoofer channel at 350 W. It accepts a wide DC input range of 12 V to 38 V and includes a 36 V 8 A power adapter with a 5.5 × 2.5 mm barrel plug. Bluetooth, AUX and USB flash-drive inputs let you connect phones, TVs or laptops directly. Separate treble and bass knobs give hands-on tonal control.

For DIY speaker builders and compact-system owners

Makers who want a single board to power a 2.1 speaker set with strong output and basic tone shaping will find the S350HS a good fit. The board requires an external enclosure, speaker wiring and a suitable DC supply within the 12–38 V window. Buyers needing balanced XLR inputs, digital optical or HDMI audio, or multi-channel surround decoding should look at other solutions. The integrated cooling fan handles heat, but sustained peak output still demands adequate ventilation in the final cabinet.

220 W × 2 + 350 W peak output at 12–38 V DC

The combined peak power rating of 220 W per satellite channel plus 350 W for the subwoofer is the key figure for matching drivers and choosing a power supply. With the included 36 V 8 A adapter the board can deliver near its rated peaks, while a lower-voltage supply will reduce maximum output. Verify that your speakers can handle the stated power and that your supply stays within the 12 V to 38 V range before purchasing.