The Fosi Audio BT30D Pro is a 2.1-channel Bluetooth 5.0 amplifier built on two TI TPA3255 chips, rated up to 165W × 2 + 350W @ 4Ω, with passive subwoofer terminals and a 3.5mm pre-out. It suits 2.1 systems built around passive speakers and a passive subwoofer, and comes with a 32V/5A adapter or without a power supply.
Who the Fosi Audio BT30D Pro is for
2.1 systems with passive speakers: Two TI TPA3255 chips rated up to 165W × 2 + 350W @ 4Ω drive a pair of passive speakers and a passive subwoofer from one box.
Powered speakers or subs: The 3.5mm pre-out feeds powered speakers, a powered subwoofer or another amplifier, per Fosi.
Wireless streaming: Bluetooth 5.0 reaches up to 15m, per Fosi, and an RCA input takes wired sources such as a TV, computer or DVD player.
Buyers with a power supply already: The Not Included option ships as the amp, Bluetooth antenna and manual only, for use with your own 32V/5A adapter.
Skip it if: You need optical, coaxial or USB inputs or a remote; the BT30D Pro takes Bluetooth and RCA only.
Fosi Audio BT30D Pro key specs
Amplifier chips: 2 × TI TPA3255, Class D
Max output power: 165W × 2 + 350W @ 4Ω (Fosi max rating)
Controls: Volume, bass, treble, SUB FREQ (0–300Hz), SUB VOL
Speaker impedance: 2–8Ω
SNR / frequency range: ≥108dB / 20Hz–20kHz (±1dB)
Power input: 32V/5A DC; Fosi allows 48V/5A only on units marked DC 24–48V on the rear panel, with active cooling
Size: 160 × 120 × 40 mm (6.30 × 4.73 × 1.58 in)
In the box: BT30D Pro, Bluetooth antenna, user manual; the 32V/5A Adapter option adds a 32V/5A power adapter, the Not Included option has no power supply
Genuine Fosi Audio stock. Free shipping on every order, 45-day returns.
Fosi Audio BT30D Pro vs similar options
vs Fosi Audio BT20A Pro: Adds socketed NE5532 op-amps and a stereo rating of up to 300W × 2 @ 4Ω from the same TPA3255 chip; pick the BT30D Pro for passive subwoofer terminals with SUB FREQ and SUB VOL knobs.
vs Fosi Audio MC351: Adds USB, optical and coaxial inputs and Bluetooth 5.3 around the same dual-TPA3255, 165W × 2 + 350W rating; pick the BT30D Pro if Bluetooth and RCA cover your sources.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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