# Fosi Audio BT30D Pro 2.1 Bluetooth Amplifier, TPA3255

Source: https://www.ranked10.co.uk/tech/best-bookshelf-speakers/fosi-audio-bt30d-pro
Ranked #8 in "Best Bookshelf Speakers 2026: 10 Ranked, From £94.99": https://www.ranked10.co.uk/tech/best-bookshelf-speakers

- Price: £109.99 (checked on Amazon UK on 2026-09-17)
- Amazon rating: 4.4 from 1,901 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B09YNBHR73?tag=ranked10-21

The Fosi Audio BT30D Pro is a 2.1 mini amplifier rather than a speaker: the listing gives it two sets of passive speaker outputs and one set of passive subwoofer outputs, so the speakers are yours to supply. It sits at number eight in this guide at £109.99, with 4.4 out of 5 from 1,901 ratings.

The number the listing leads with is the one that does not hold together. The BT30D Pro is advertised as delivering up to 165W x 2 + 350W, which comes to 680W in total, and the box contents list a 32V/5A power supply — 160W of input feeding a 680W output claim. The same listing states the item weight as 680 g. Everything on this page is taken from the Amazon listing as we received it; we have not measured, tested or listened to the amplifier ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £109.99 |
| Rating | 4.4 out of 5 from 1,901 ratings |
| Claimed output power | 165W x 2 + 350W (as listed) |
| Supplied power supply | 32V/5A, or 160W of input |
| Amplifier chips | Two Texas Instruments TPA3255 (as listed) |
| Bluetooth | 5.0, stated range up to 15 m (as listed) |
| Item weight | 680 g (as listed) |
| Outputs | Two sets of passive speaker outputs and one passive subwoofer output |

## Questions people ask

**How much power does the Fosi Audio BT30D Pro claim?**

The listing states it outputs up to 165W x 2 + 350W, using two Texas Instruments TPA3255 Class-D amplifier chips.

**What power supply is in the box?**

The box contents list a 32V/5A power supply, alongside a Bluetooth antenna, the amplifier itself and a user manual.

**Does the Fosi Audio BT30D Pro come with speakers?**

No. The listing describes it as a 2.1 channel amplifier with two sets of passive speaker outputs and one passive subwoofer output, so speakers are bought separately.

**Which Bluetooth version does it use?**

Bluetooth 5.0, with a stated connection range of up to 15 metres.

**How heavy is the Fosi Audio BT30D Pro?**

The listing gives the item weight as 680 g.

**What controls does the Fosi Audio BT30D Pro have?**

The product name lists bass and treble controls, and the listing describes two dedicated subwoofer knobs, including a SUB FREQ knob for adjusting the frequency of a passive subwoofer.