Fosi Audio BT20A
- 5 reviews
- Fosi Audio
Fosi Audio BT20A
- 5 reviews
- Fosi Audio
$78.08
- Authorized Dealer · Tech Support · 30-Day Returns
Why it stands out
Best for
Not ideal for
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Setup guide
How to connect
What you should know
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Frequently asked questions
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Official product information provided by Fosi Audio
The following product descriptions, specifications and images are provided by the manufacturer.
Fosi Audio BT20A is a compact two-channel Class-D integrated amplifier for passive speakers, with Bluetooth and RCA inputs.
It combines straightforward wireless playback, bass and treble adjustment, and up to 100 W per channel maximum output in a small desktop-friendly chassis.
Why it stands out
Compact passive-speaker amplifier
Provides stereo speaker amplification without the size and complexity of a full-size receiver.
Bluetooth and wired playback
Switch between Bluetooth 5.0 streaming and an analog RCA source.
Front-panel tone control
Independent bass and treble knobs make quick system tuning simple.
Simple everyday operation
A compact front panel keeps power, volume, bass and treble adjustment immediately accessible without menus or an app.
Best for
- Desktop passive-speaker systems
- Bookshelf speakers in small and medium rooms
- Simple Bluetooth stereo systems
- TVs or streamers with analog line output
Not ideal for
- Systems requiring HDMI ARC, optical or USB input
- Users needing a subwoofer output
- Headphone listening
EMiUZEK Buying Notes
- BT20A powers passive speakers; it is not intended as an input for powered speakers.
- The quoted 100 W × 2 is the manufacturer's maximum specification and depends on load and power supply.
- It has no phono stage, so most turntables require a phono preamplifier or line-level output.
Frequently asked questions
Can it drive passive speakers directly?
Yes. It supports 2–8 Ω passive speakers through the rear binding posts.
Can it connect to active speakers?
No dedicated pre-output is provided. Use BT20A to power passive speakers.
Does it have a subwoofer output?
No.
Can I connect a turntable?
Only when the turntable has a built-in phono stage or an external phono preamplifier is used.
Does it support aptX?
The official specification lists Bluetooth 5.0 but does not specify aptX support.
Can I connect a TV?
Yes, when the TV provides compatible analog audio output; there is no optical or HDMI input.
HOW TO CONNECT
Bluetooth speaker system
Source icon: phone
Source: Phone / tablet
Connection: Bluetooth 5.0
Output connection: Speaker terminals
Target icon: speakers
Output: Passive speakers
Wired stereo system
Source icon: streamer
Source: Streamer / DAC / TV analog output
Connection: RCA
Output connection: Speaker terminals
Target icon: speakers
Output: Passive speakers
Turntable stereo system
Source icon: turntable
Source: Turntable with built-in phono stage or external phono preamplifier
Connection: RCA line input
Output connection: Speaker terminals
Target icon: speakers
Output: Passive speakers
Note: Do not connect a phono-level turntable directly unless a compatible phono preamplifier is used.
Technical Specifications
Inputs
| Feature | Specification |
|---|---|
| Bluetooth 5.0 | Included |
| RCA line input | Included |
Outputs
| Feature | Specification |
|---|---|
| Stereo speaker binding posts | Included |
Amplification
| Feature | Specification |
|---|---|
| Amplifier Architecture | Class D |
| Amplifier Chipset | Dual TI TPA3116D2 |
| Maximum Output Power | 100 W × 2 |
| Speaker Impedance | 2–8 Ω |
| Frequency Response | 20 Hz–20 kHz (±1 dB) |
| SNR | ≥98 dB |
| THD | ≤0.5% |
Connectivity and power
| Feature | Specification |
|---|---|
| Bluetooth Range | up to approximately 15 m / 50 ft without obstacles |
| DC Input Range | 12–24 V |
| Supplied Power Adapter | 24 V / 4.5 A |
Additional Product Content
Comparison: BT20A or BT20A Pro?
| Feature | BT20A | BT20A Pro |
|---|---|---|
| Amplifier chip | Dual TPA3116D2 | TPA3255 |
| Maximum output | 100 W × 2 | 300 W × 2 at 4 Ω |
| Pre-out | No | 3.5 mm variable pre-out |
| Best use | Simple compact stereo | Higher-output expandable stereo |
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