Our Story
Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products NOW!
Bluetooth 5.0 Mini Hi-Fi Amplifier
Product Parameters:
- Power Adapter: 19V/4.74A
- DC Input Range: 15-24V
- Terminating Impedance: 2 Ohm - 8 Ohm
- MAX Power Output: 50W x 2
- THD: = 0.04%;
- Frequency Range: 20Hz - 20kHz (±1 dB)
- SNR: = 98dB
- Input Sensitivity = 280mV
- Input Mode: Bluetooth and 3.5mm AUX
- Bluetooth Transmission Distance: Up to 50ft(15m)
- 2 Channel Power Amp: BT10A, BT20A, TB10A, TB10D, V1.0B, V1.0G, TDA7498E, ZK-1002, ZK-502T.
- 2.1 Channel Power Amp: BT30D, BT30D Pro, BL20A, BL20C, ZK-TB21.
- DAC: Q4, K5 Pro, DS1, DS2. DAC Amplifier: PH04, DA2120A, DA2120C.
- Subwoofer Amp: TP-02, M01-BT, M02, M03, M04.
- Phono Preamp: BOX X1, BOX X2, BOX X3, BOX X4. Tube Preamp: P1.
- Tube Headphone Amplifier: T20, T20X, P2.
- Class AB Amplifier: T3.
Bluetooth 5.0
- Bluetooth 5.0 streaming range up to 50 ft(15m)
Bass and Treble Control
- With bass and treble control, adjust the sound in your need
Mini but Powerful
- Texas Instruments 3116D2 Amp chip ensure Hi-Fi sound quality
2.0CH Class D Amp
- Perfect for home bookshelf/desktop/passive speakers
How to use the BT10A Bluetooth amplifier?
- Step 1: Connect the speaker wire.
- BT10A support bare wire, banana plugs, spade lugs, or pin terminators. Please turn off the amplifier before connecting to the speakers.
- Step 2: Connect the power supply
- Be sure that the volume/power switch on the front panel is in the OFF position before connecting the power supply.
- Step 3: Operation
- Turn on the volume/power knob and set the volume control to an initial set of about 9 o’clock. Turn on your audio input source and adjust the volume to your desired listening level.
Bluetooth Connection
- The Bluetooth name is 'Fosi Audio BT10A', please volume down before Bluetooth connects.
- You can pair it with your Bluetooth device when the amp is powered on.
- If Bluetooth connects, the 3.5mm AUX input is interrupted.
- You need to turn off the Bluetooth on your device if you use 3.5MM AUX input when Bluetooth pairing.
 BT10A |  BT20A |  BT20A PRO |  BT30D |  BL20A |  V3 | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — | — | — | — | — | — |
| Type | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.1 CH Amp | Bluetooth 2.1 CH Amp with Remote Control | 2.0 CH Amp |
| MAX Power Output | 50W x 2 | 100W x 2 | 300W x 2 | 50W x 2+100W | 100W x 2 | 300W x 2 |
| Input | Bluetooth + 3.5mm AUX | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + 3.5mm AUX + U-disk | RCA |
| Output | Passive Speakers | Passive Speakers | Passive Speakers+Active Speakers/Sub/Amp | Passive Speakers+Active/Passive Subwoofer | Passive Speakers + Active Speakers/Amplifier/Active Subwoofer | Passive Speakers+Pre-Out |
| Treble & Bass Control | ? | ? | ? | ? | ? | x |
| THD | = 0.04% | = 0.04% | = 0.005% | = 0.04% | = 0.001% | <0.003% |
| SNR | = 98dB | = 98dB | =108dB | = 98dB | = 92dB | =110dB |
| Terminating Impedance | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm |
| Power Adapter | 19V/4.74A | 24V/4.5A | 32V/5A | 24V/4.5A | 24V/4.5A | 32V/5A |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V |
 T3 |  HT4S |  BOX X1 |  BOX X2 |  BOX X4 |  5654W Tube | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — no data | — | — | — | — | — no data |
| Type | Bluetooth Tube 2.1 CH Amp | Bluetooth 4.1 CH Amp | Phono Preamp | Phono Preamp with Vacumm Tubes | Phono Preamp with Vacumm Tubes | Vacuum Tubes |
| MAX Power Output | 50W x 2 | 30w*4+60W*1 | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | - no data |
| Input | Bluetooth + 3.5mm AUX1+3.5mm AUX2 | Bluetooth + 3.5mm AUX + OPT | RCA | RCA+3.5mm AUX | RCA+3.5mm AUX | - no data |
| Output | Passive Speakers + Active Subwoofer+ Headphone | 3.5mm Pre-Out + Speaker Out | Active Speakers + Headphone | Active Speakers | RCA+3.5mm AUX | - no data |
| Treble & Bass Control | ? | ? | x | x | ? | - no data |
| THD | = 0.1% | = 0.03% | = 0.08% | = 0.1% | =0.1% | - no data |
| SNR | = 80dB | =88dB | = 70dB | = 98dB | =70dB | - no data |
| Terminating Impedance | 4-8 Ohm | 4-8 Ohm | - no data | - no data | - no data | - no data |
| Power Adapter | - no data | - no data | 12V/1.5A | 12V/1.5A | 12V/1.5A | - no data |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | - no data |
Amplifying Your Voice, Shaping Our Innovation
Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide.
Bluetooth 5.0 Stereo Amplifier
DAC Headphone Amplifier
2.0 Channels Home Audio Amp
Subwoofer Amplifier & Mono Amp
Fosi Audio S3 HiFi Streamer
Fosi Audio S3 HiFi Music Streamer DAC Preamp
Fosi Audio V3
TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2
Fosi Audio CA30
Bluetooth 5.0 Mini Hi-Fi Amplifier
Our Story
Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products NOW!
Product Parameters:
- Power Adapter: 19V/4.74A
- DC Input Range: 15-24V
- Terminating Impedance: 2 Ohm - 8 Ohm
- MAX Power Output: 50W x 2
- THD: = 0.04%;
- Frequency Range: 20Hz - 20kHz (±1 dB)
- SNR: = 98dB
- Input Sensitivity = 280mV
- Input Mode: Bluetooth and 3.5mm AUX
- Bluetooth Transmission Distance: Up to 50ft(15m)
- 2 Channel Power Amp: BT10A, BT20A, TB10A, TB10D, V1.0B, V1.0G, TDA7498E, ZK-1002, ZK-502T.
- 2.1 Channel Power Amp: BT30D, BT30D Pro, BL20A, BL20C, ZK-TB21.
- DAC: Q4, K5 Pro, DS1, DS2. DAC Amplifier: PH04, DA2120A, DA2120C.
- Subwoofer Amp: TP-02, M01-BT, M02, M03, M04.
- Phono Preamp: BOX X1, BOX X2, BOX X3, BOX X4. Tube Preamp: P1.
- Tube Headphone Amplifier: T20, T20X, P2.
- Class AB Amplifier: T3.
Bluetooth 5.0
- Bluetooth 5.0 streaming range up to 50 ft(15m)
Bass and Treble Control
- With bass and treble control, adjust the sound in your need
Mini but Powerful
- Texas Instruments 3116D2 Amp chip ensure Hi-Fi sound quality
2.0CH Class D Amp
- Perfect for home bookshelf/desktop/passive speakers
How to use the BT10A Bluetooth amplifier?
- Step 1: Connect the speaker wire.
- BT10A support bare wire, banana plugs, spade lugs, or pin terminators. Please turn off the amplifier before connecting to the speakers.
- Step 2: Connect the power supply
- Be sure that the volume/power switch on the front panel is in the OFF position before connecting the power supply.
- Step 3: Operation
- Turn on the volume/power knob and set the volume control to an initial set of about 9 o’clock. Turn on your audio input source and adjust the volume to your desired listening level.
Bluetooth Connection
- The Bluetooth name is 'Fosi Audio BT10A', please volume down before Bluetooth connects.
- You can pair it with your Bluetooth device when the amp is powered on.
- If Bluetooth connects, the 3.5mm AUX input is interrupted.
- You need to turn off the Bluetooth on your device if you use 3.5MM AUX input when Bluetooth pairing.
BT10A | BT20A | BT20A PRO | BT30D | BL20A | V3 | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — | — | — | — | — | — |
| Type | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.1 CH Amp | Bluetooth 2.1 CH Amp with Remote Control | 2.0 CH Amp |
| MAX Power Output | 50W x 2 | 100W x 2 | 300W x 2 | 50W x 2+100W | 100W x 2 | 300W x 2 |
| Input | Bluetooth + 3.5mm AUX | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + 3.5mm AUX + U-disk | RCA |
| Output | Passive Speakers | Passive Speakers | Passive Speakers+Active Speakers/Sub/Amp | Passive Speakers+Active/Passive Subwoofer | Passive Speakers + Active Speakers/Amplifier/Active Subwoofer | Passive Speakers+Pre-Out |
| Treble & Bass Control | ? | ? | ? | ? | ? | x |
| THD | = 0.04% | = 0.04% | = 0.005% | = 0.04% | = 0.001% | <0.003% |
| SNR | = 98dB | = 98dB | =108dB | = 98dB | = 92dB | =110dB |
| Terminating Impedance | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm |
| Power Adapter | 19V/4.74A | 24V/4.5A | 32V/5A | 24V/4.5A | 24V/4.5A | 32V/5A |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V |
T3 | HT4S | BOX X1 | BOX X2 | BOX X4 | 5654W Tube | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — no data | — | — | — | — | — no data |
| Type | Bluetooth Tube 2.1 CH Amp | Bluetooth 4.1 CH Amp | Phono Preamp | Phono Preamp with Vacumm Tubes | Phono Preamp with Vacumm Tubes | Vacuum Tubes |
| MAX Power Output | 50W x 2 | 30w*4+60W*1 | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | - no data |
| Input | Bluetooth + 3.5mm AUX1+3.5mm AUX2 | Bluetooth + 3.5mm AUX + OPT | RCA | RCA+3.5mm AUX | RCA+3.5mm AUX | - no data |
| Output | Passive Speakers + Active Subwoofer+ Headphone | 3.5mm Pre-Out + Speaker Out | Active Speakers + Headphone | Active Speakers | RCA+3.5mm AUX | - no data |
| Treble & Bass Control | ? | ? | x | x | ? | - no data |
| THD | = 0.1% | = 0.03% | = 0.08% | = 0.1% | =0.1% | - no data |
| SNR | = 80dB | =88dB | = 70dB | = 98dB | =70dB | - no data |
| Terminating Impedance | 4-8 Ohm | 4-8 Ohm | - no data | - no data | - no data | - no data |
| Power Adapter | - no data | - no data | 12V/1.5A | 12V/1.5A | 12V/1.5A | - no data |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | - no data |
Amplifying Your Voice, Shaping Our Innovation
Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide.
Bluetooth 5.0 Stereo Amplifier
DAC Headphone Amplifier
2.0 Channels Home Audio Amp
Subwoofer Amplifier & Mono Amp
Fosi Audio S3 HiFi Streamer
Fosi Audio S3 HiFi Music Streamer DAC Preamp
Fosi Audio V3
TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2
Fosi Audio CA30