Fosi Audio BT30D PRO – Review

Fosi Audio BT30D PRO

Fosi Audio BT30D PRO

 | Speaker amplifier | Bluetooth | 

Fosi Audio BT30D PRO, the newest speaker amplifier from Fosi Audio.

The Fosi Audio BT30D PRO is the successor of the BT30D, carrying now the “PRO” label under the belt.

The added PRO label might seem like a sketchy marketing move but, instead, this newest PRO version offers a huge upgrade over the non-PRO version.

Among these differences, the BT30D VS BT30D Pro has a MAX Power Output upgrade from: “50 Watt x2+100 Watt” to “165 Watt x2+350 Watt” for the BT30D PRO.

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Fosi Audio BT30D PRO Review

Tests & Scores


Advanced Features

The Fosi Audio BT30D PRO include advanced features such as:

• Bluetooth 5.0
• 2.1
• Bass, treble and subwoofer control


Accessories & Packaging

This Fosi Audio amp comes inside a simple box with a sufficient padding to protect the unit during delivery.

The device comes with: 1x power cable, 1x power supply unit and 1x Bluetooth antenna.




The Fosi Audio BT30D PRO has a classic rectangular form factor with a nice semi-pearled finish.

On the bottom, the amp is equipped with 4 rubberized feet (almost feeling like silicone) that do an outstanding job keeping the amp in place.

As with most other competitors, the BT30D PRO makes use of an external PSU to keep a small footprint.

Overall, the unit has a nice, elegant look that can match any user´s HiFi system without becoming tacky nor flashy.

The exact dimensions of the Fosi Audio BT30D PRO are: 120mmx160mmx40mm



Operation & Control

The Fosi Audio BT30D PRO has an extremely easy and intuitive control design with 5 knobs and a power switch.

The dedicated knobs allow a finer and more independent control of each of the volume and tuning features of the amp.

All the knobs have a very nice smooth movement with a stepless rotation that goes from min to max by rotating it 270 degrees.

Probably the only negative aspect on this section is the fact that the Fosi Audio BT30D PRO does not have any IR remote.


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Construction & Build

The MSRP of the Fosi Audio BT30D PRO might make you wonder if the brand has cheaped out on the construction quality of the amp; instead, the BT30D PRO has a surprisingly rugged feel by utilizing a full aluminum build – even the knobs are made of metal.

In addition to this, there is no single piece of the unit that wobbles or rattles – the amp is very nicely assembled.



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This class D power amplifier can drive either passive or active speakers and is equipped with subwoofer output, in addition to a full range 3.5mm pre out.

Combined, the Fosi Audio BT30D PRO connections enables the possibility of a fully functional 2.1 audio system.

The unit offers 2 input connections and 4 output connections.

Inputs include:

• RCA input
• Wireless Bluetooth input

While outputs are:

• 2x Stereo Banana plugs for speakers
• 1x Stereo Banana plugs for Subwoofer
• 1x Full range 3.5mm pre out


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Inside, the BT30D PRO is equipped with dual Texas Instruments TPA3255 amplifier chipsets; upgraded from the TPA3116D2 chipsets found on the non-PRO version.

The Fosi Audio BT30D PRO might look small and nearly harmless in comparison with other amps with similar output but it is fair to highlight that despite it´s tiny size, this amp can offer a massive 2x165W max output + 1x350W on a 2.1 system configuration – the 2.1 amp capability means that this device can drive 2 active or passive speakers + 1 subwoofer; at the same time.

Our editors tested out the amp with a 2.1 system that included 2x JBL 3-way triple driver standing floor passive speakers + 1x Yamaha subwoofer; the Fosi Audio amp showed no issue driving the 3 units, allowing them to be cranked up as high as entering a party-level output dB.

Despite the massive output, the amp did not introduce any distortion nor audio degradation.

Our team evaluated and tested any signs of noise, signal contamination, channel imbalance, coloration and hiss; the Fosi Audio BT30D PRO got promoted on all 5 departments.

On top of that, our measurements showed a pristine flat frequency response from 20Hz up to 24kHz with no dips nor spikes.

Users will also be happy to know that the BT30D PRO did not show scratching issues with any of the potentiometers.

Fosi Audio BT30D PRO
Fosi Audio BT30D PRO

This amp incorporates some neat features that set them apart from other competitors with their 5 knob system that offers the possibility to independently control and tune Speakers Volume, Bass, Treble, Subwoofer Volume, Subwoofer frequency.

The brand does not specifies the range of their Treble, Bass and Subwoofer tuning controls but our tests revealed a massive difference when cranking up/down both Treble and Bass tuning knobs and a groundbreaking control and customization of the subwoofer by the Sub knob and Sub frequency knob – the latter allows users a finer tuning of the wanted response range for the subwoofer.


Sound Technical Specifications

Output Level: 150W x2 (4ohm) + 350W (2ohm)
THD+N: 0.04%
Frequency response: 20Hz-20kHz
Input sensitivity: 700mV
SNR: 108dB



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Scores Scores

Fosi Audio BT30D PRO Scores

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Frequency Response (raw)

Fosi Audio BT30D PRO Frequency Response Curve and measurements


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Fosi Audio BT30D PRO Technical Specifications

Max output165W x2 + 350W
Speaker ampYes
Subwoofer ampYes

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Fosi Audio BT30D PRO