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!
2.1 CH Bluetooth 5.0 Stereo Amp
Product Parameters:
Input mode: U-disk/Bluetooth/RCA
Output mode: Powered subwoofer+ Passive Speakers
SNR: =98dB
THD: =0.05%
Working voltage: 19-35V
U-disk: USB 2.0, compatible with USB 3.0
U-disk capacity: MAX 32GB, no more than 100MB per file
Support format: MP3/WMA/APE/ FLAC/WAV
Max output power: 160 Watt×2 + powered subwoofer
- 2 Channel Power Amp: BT10A, BT20A, BT20A Pro, 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.
Mutiple Input Modes
Easily adjust your input mode with the BL20C audio amplifier's convenient input mode switch, which allows you to choose between U-disk, Bluetooth, and RCA inputs. With priority given to U-disk, followed by Bluetooth and RCA, BL20C ensures a seamless and tailored listening experience.
STMicroelectronics TDA7498E Chip
The BL20C audio amplifier provides powerful dual-channel stereo output with 160-W + 160-W power output at THD=10% with RL=4O and VCC=36V. It also features a 220-W mono parallel BTL output at THD=10% with RL=3O and VCC=36V, taking your audio experience to the next level.
Build 2.1 Channel Stereo System
Setting up a home stereo sound system with 2.1 amp BL20C is a breeze, as it can effortlessly connect with both passive speakers and a powered subwoofer. In just a few minutes, you can have a fully functional and immersive audio setup.
 BL20A |  BL20C |  BT20A |  BT30D |  BT30D PRO |  BT20A PRO | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — | — | — | — | — | — |
| Type | Bluetooth 2.1 CH Amp with Remote Control | Bluetooth 2.1 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.1 CH Amp | Bluetooth 2.1 CH Amp | Bluetooth 2.0 CH Amp |
| MAX Power Output | 100W x 2 | 160W x 2 | 100W x 2 | 50W x 2+100W | 165W×2+350W | 300W x 2 |
| Input | Bluetooth + 3.5mm AUX + U-disk | Bluetooth + RCA + U-disk | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + RCA |
| Output | Passive Speakers + Active Speakers/Amplifier/Active Subwoofer | Passive Speakers + Active Subwoofer | Passive Speakers | Passive Speakers+Active/Passive Subwoofer | Passive/Active Speakers+ Passive/Active Subwoofer | Passive Speakers+Active Speakers/Sub/Amp |
| Treble & Bass Control | ? | ? | ? | ? | ? | ? |
| THD | = 0.001% | = 0.05% | = 0.04% | = 0.04% | = 0.3% | = 0.005% |
| SNR | = 92dB | = 98dB | = 98dB | = 98dB | = 85dB | =108dB |
| Terminating Impedance | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm |
| Power Adapter | 24V/4.5A | 24V/4.5A | 24V/4.5A | 24V/4.5A | 32V/5A | 32V/5A |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V |
 T3 |  V3 |  T20 |  Q4 |  DS1 |  48V5A | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — no data | — | — no data | — | — | — |
| Type | Bluetooth Tube 2.1 CH Amp | 2.0 CH Amp | Bluetooth Tube 2.0 CH Amp | DAC+Headphone Amp | DAC+Headphone Amp | 48V5A Power Supply |
| MAX Power Output | 50W x 2 | 300W x 2 | 50W x 2 | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | 120mW@32 Ohm(SE); 220mW@32 Ohm(BAL) | 240W |
| Input | Bluetooth + 3.5mm AUX1+3.5mm AUX2 | RCA | Bluetooth + RCA | PC-USB + Optical + Coaxial | Type C+ USB A | - no data |
| Output | Passive Speakers + Active Subwoofer+ Headphone | Passive Speakers+Pre-Out | Passive Speakers + Headphone | RCA + 3.5mm Headphone | 3.5mm Headphone+ 4.4mm Headphone | - no data |
| Treble & Bass Control | ? | x | ? | ? | x | - no data |
| THD | = 0.1% | <0.003% | = 0.04% | =0.01% | = 0.0006%(SE) = 0.001%(BAL) | - no data |
| SNR | = 80dB | =110dB | = 98dB | =105dB | =120dB | - no data |
| Terminating Impedance | 4-8 Ohm | 2-8 Ohm | 2-8 Ohm | 16-200 Ohm | 16-300 Ohm | - no data |
| Power Adapter | - no data | 32V/5A | 24V/4.5A | - no data | - no data | 48V/5.0A |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | DC 5V | - no data | AC 110V - 240V |
DAC Headphone Amplifier
Bluetooth 5.0 Stereo 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
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.
2.1 CH Bluetooth 5.0 Stereo Amp
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!
Product Parameters:
Input mode: U-disk/Bluetooth/RCA
Output mode: Powered subwoofer+ Passive Speakers
SNR: =98dB
THD: =0.05%
Working voltage: 19-35V
U-disk: USB 2.0, compatible with USB 3.0
U-disk capacity: MAX 32GB, no more than 100MB per file
Support format: MP3/WMA/APE/ FLAC/WAV
Max output power: 160 Watt×2 + powered subwoofer
- 2 Channel Power Amp: BT10A, BT20A, BT20A Pro, 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.
Mutiple Input Modes
Easily adjust your input mode with the BL20C audio amplifier's convenient input mode switch, which allows you to choose between U-disk, Bluetooth, and RCA inputs. With priority given to U-disk, followed by Bluetooth and RCA, BL20C ensures a seamless and tailored listening experience.
STMicroelectronics TDA7498E Chip
The BL20C audio amplifier provides powerful dual-channel stereo output with 160-W + 160-W power output at THD=10% with RL=4O and VCC=36V. It also features a 220-W mono parallel BTL output at THD=10% with RL=3O and VCC=36V, taking your audio experience to the next level.
Build 2.1 Channel Stereo System
Setting up a home stereo sound system with 2.1 amp BL20C is a breeze, as it can effortlessly connect with both passive speakers and a powered subwoofer. In just a few minutes, you can have a fully functional and immersive audio setup.
BL20A | BL20C | BT20A | BT30D | BT30D PRO | BT20A PRO | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — | — | — | — | — | — |
| Type | Bluetooth 2.1 CH Amp with Remote Control | Bluetooth 2.1 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.1 CH Amp | Bluetooth 2.1 CH Amp | Bluetooth 2.0 CH Amp |
| MAX Power Output | 100W x 2 | 160W x 2 | 100W x 2 | 50W x 2+100W | 165W×2+350W | 300W x 2 |
| Input | Bluetooth + 3.5mm AUX + U-disk | Bluetooth + RCA + U-disk | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + RCA |
| Output | Passive Speakers + Active Speakers/Amplifier/Active Subwoofer | Passive Speakers + Active Subwoofer | Passive Speakers | Passive Speakers+Active/Passive Subwoofer | Passive/Active Speakers+ Passive/Active Subwoofer | Passive Speakers+Active Speakers/Sub/Amp |
| Treble & Bass Control | ? | ? | ? | ? | ? | ? |
| THD | = 0.001% | = 0.05% | = 0.04% | = 0.04% | = 0.3% | = 0.005% |
| SNR | = 92dB | = 98dB | = 98dB | = 98dB | = 85dB | =108dB |
| Terminating Impedance | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm |
| Power Adapter | 24V/4.5A | 24V/4.5A | 24V/4.5A | 24V/4.5A | 32V/5A | 32V/5A |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V |
T3 | V3 | T20 | Q4 | DS1 | 48V5A | |
|---|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — | — |
| Price | — no data | — | — no data | — | — | — |
| Type | Bluetooth Tube 2.1 CH Amp | 2.0 CH Amp | Bluetooth Tube 2.0 CH Amp | DAC+Headphone Amp | DAC+Headphone Amp | 48V5A Power Supply |
| MAX Power Output | 50W x 2 | 300W x 2 | 50W x 2 | Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. | 120mW@32 Ohm(SE); 220mW@32 Ohm(BAL) | 240W |
| Input | Bluetooth + 3.5mm AUX1+3.5mm AUX2 | RCA | Bluetooth + RCA | PC-USB + Optical + Coaxial | Type C+ USB A | - no data |
| Output | Passive Speakers + Active Subwoofer+ Headphone | Passive Speakers+Pre-Out | Passive Speakers + Headphone | RCA + 3.5mm Headphone | 3.5mm Headphone+ 4.4mm Headphone | - no data |
| Treble & Bass Control | ? | x | ? | ? | x | - no data |
| THD | = 0.1% | <0.003% | = 0.04% | =0.01% | = 0.0006%(SE) = 0.001%(BAL) | - no data |
| SNR | = 80dB | =110dB | = 98dB | =105dB | =120dB | - no data |
| Terminating Impedance | 4-8 Ohm | 2-8 Ohm | 2-8 Ohm | 16-200 Ohm | 16-300 Ohm | - no data |
| Power Adapter | - no data | 32V/5A | 24V/4.5A | - no data | - no data | 48V/5.0A |
| Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | DC 5V | - no data | AC 110V - 240V |
DAC Headphone Amplifier
Bluetooth 5.0 Stereo 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
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.
