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The upgraded version of Fosi Audio BT20A
Fosi Audio BT20A Pro 600W TPA3255 Bluetooth 2.0 CH Amplifier
- Input: Bluetooth + RCA; Output: Passive Speakers + Pre-out
- THD: = 0.005%; SNR: =108dB;
- MAX Output Power: 300Wx2@4O (Using a 48V10A Power Supply)
*Note: It should be emphasized that 300W refers to the maximum power supported by the product's chip, which can only be achieved with a 48V 10A power supply. The power supply's voltage and current determine the amplifier's maximum output. For more details, please refer to the illustration below on Power Variability.
Bluetooth Distance: =15m
Bluetooth Transmission Format: SBC/AAC
Note: The amp prioritizes Bluetooth and doesn't support simultaneous RCA and Bluetooth input.
Unique Design for Sound Control
Experience the authentic sound without any added effects by adjusting them to their middle points.
Full-range Pre-Out Output
Easily connect to a powered subwoofer, speaker, or another amplifier for versatile audio options.
Texas Instrument TPA3255 Chip
Has a unique smart algorithm that optimizes the output stage for max efficiency and min distortion.
Upgrade Audio Performance
Achieve a Distinct and Exceptional Sound Quality
The two plug-in NE5532 Op-Amps can be replaced by LME49720HA/MUSES02/OPA2134PA Op-Amps, etc.
High Precision and Stability Inductance Values
- Low DC resistance and excellent frequency characteristics which improve performance
Friendly Solutions Guide
1. Check Connections & Device Compatibility: (1)Ensure all audio cables are fully inserted and undamaged. Replace any frayed cables with high-quality shielded ones(recommended: cables with metal connectors). (2)Confirm your speakers' power rating(e.g., 50W/100W) and impedance(e.g., 4O/8O) match the amplifier's requirements(see product manual).(3)Avoid raising the volume beyond your speakers' labeled maximum(e.g., “Max 80%") to prevent distortion.
2. Optimize Setup & Audio Sources: (1)Speaker Upgrade: Use high-resolution speakers placed at least 30cm away from walls or corners. Add rugs or curtains to reduce echoes. (2) Audio Quality: Play lossless music formats(e.g., FLAC, WAV) on dedicated devices(e.g., music players or updated phones/computers).(3) EQ Adjustment: Reset the equalizer to the neutral(flat) position initially. Adjust bass/treble gradually(like adjustments to 50% of the scale).
3. Reduce Environmental Interference:
(1) Anti-Interference Cables: Use shielded RCA cables with grounding(metal-shell connectors) to minimize buzzing.
(2) Distance from Interference: Keep audio/Bluetooth cables =30cm away from routers, power outlets, or microwaves.
(3) Troubleshoot Sources: Test the same song on another phone/computer. If the noise persists, contact support for a replacement.
Note: This product is designed to prioritize Bluetooth over RCA when both are connected and doesn't support dual-input playback simultaneously.
BT20A PRO
Comparison Chart
Bluetooth 2.0 CH Amp | Type | Bluetooth 4.1 CH Amp |
300W x 2 | MAX Power Output | 30w*4+60W*1 |
Bluetooth + RCA | Input | BT + 3.5mm AUX + OPT |
Passive SPK +Pre-out | Output | Pre-Out+SPK Out |
Treble&Bass Control | ||
= 0.005% | THD | = 0.03% |
=108dB | SNR | =88dB |
Bluetooth 2.0 CH Amp | Type | Bluetooth 2.1 CH Amp |
300W x 2 | MAX Power Output | 165W x 2 + 350W @ 4O |
Bluetooth + RCA | Input | BT+RCA+COA+OPT+USB |
Passive SPK +Pre-out | Output | SPK/SUB/PRE OUT |
Treble&Bass Control | ||
= 0.005% | THD | =0.03% |
=108dB | SNR | =100dB |
Bluetooth 2.0 CH Amp | Type | 2.0 CH Amp |
300W x 2 | MAX Power Output | 300W x 2 |
Bluetooth + RCA | Input | RCA |
Passive SPK +Pre-out | Output | Passive SPK +Pre-out |
Treble&Bass Control | ||
= 0.005% | THD | <0.003% |
=108dB | SNR | =110dB |
Bluetooth 2.0 CH Amp | Type | Headphone Amp+Preamp |
300W x 2 | MAX Power Output | - |
Bluetooth + RCA | Input | Bluetooth + RCA |
Passive SPK +Pre-out | Output | RCA+Headphone+AUX |
Treble&Bass Control | ||
= 0.005% | THD | = 0.02% |
=108dB | SNR | =103dB |
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.
aplus content video
The upgraded version of Fosi Audio BT20A
Fosi Audio BT20A Pro 600W TPA3255 Bluetooth 2.0 CH Amplifier
- Input: Bluetooth + RCA; Output: Passive Speakers + Pre-out
- THD: = 0.005%; SNR: =108dB;
- MAX Output Power: 300Wx2@4O (Using a 48V10A Power Supply)
*Note: It should be emphasized that 300W refers to the maximum power supported by the product's chip, which can only be achieved with a 48V 10A power supply. The power supply's voltage and current determine the amplifier's maximum output. For more details, please refer to the illustration below on Power Variability.
Bluetooth Distance: =15m
Bluetooth Transmission Format: SBC/AAC
Note: The amp prioritizes Bluetooth and doesn't support simultaneous RCA and Bluetooth input.
Unique Design for Sound Control
Experience the authentic sound without any added effects by adjusting them to their middle points.
Full-range Pre-Out Output
Easily connect to a powered subwoofer, speaker, or another amplifier for versatile audio options.
Texas Instrument TPA3255 Chip
Has a unique smart algorithm that optimizes the output stage for max efficiency and min distortion.
Upgrade Audio Performance
Achieve a Distinct and Exceptional Sound Quality
The two plug-in NE5532 Op-Amps can be replaced by LME49720HA/MUSES02/OPA2134PA Op-Amps, etc.
High Precision and Stability Inductance Values
- Low DC resistance and excellent frequency characteristics which improve performance
Friendly Solutions Guide
1. Check Connections & Device Compatibility: (1)Ensure all audio cables are fully inserted and undamaged. Replace any frayed cables with high-quality shielded ones(recommended: cables with metal connectors). (2)Confirm your speakers' power rating(e.g., 50W/100W) and impedance(e.g., 4O/8O) match the amplifier's requirements(see product manual).(3)Avoid raising the volume beyond your speakers' labeled maximum(e.g., “Max 80%") to prevent distortion.
2. Optimize Setup & Audio Sources: (1)Speaker Upgrade: Use high-resolution speakers placed at least 30cm away from walls or corners. Add rugs or curtains to reduce echoes. (2) Audio Quality: Play lossless music formats(e.g., FLAC, WAV) on dedicated devices(e.g., music players or updated phones/computers).(3) EQ Adjustment: Reset the equalizer to the neutral(flat) position initially. Adjust bass/treble gradually(like adjustments to 50% of the scale).
3. Reduce Environmental Interference:
(1) Anti-Interference Cables: Use shielded RCA cables with grounding(metal-shell connectors) to minimize buzzing.
(2) Distance from Interference: Keep audio/Bluetooth cables =30cm away from routers, power outlets, or microwaves.
(3) Troubleshoot Sources: Test the same song on another phone/computer. If the noise persists, contact support for a replacement.
Note: This product is designed to prioritize Bluetooth over RCA when both are connected and doesn't support dual-input playback simultaneously.
Comparison Chart
BT20A PRO
Type
Bluetooth 2.0 CH Amp
MAX Power Output
300W x 2
Input
Bluetooth + RCA
Output
Passive SPK +Pre-out
Treble&Bass Control
THD
= 0.005%
SNR
=108dB
HT4S
Type
Bluetooth 4.1 CH Amp
MAX Power Output
30w*4+60W*1
Input
BT + 3.5mm AUX + OPT
Output
Pre-Out+SPK Out
Treble&Bass Control
THD
= 0.03%
SNR
=88dB
MC351
Type
Bluetooth 2.1 CH Amp
MAX Power Output
165W x 2 + 350W @ 4O
Input
BT+RCA+COA+OPT+USB
Output
SPK/SUB/PRE OUT
Treble&Bass Control
THD
=0.03%
SNR
=100dB
V3
Type
2.0 CH Amp
MAX Power Output
300W x 2
Input
RCA
Output
Passive SPK +Pre-out
Treble&Bass Control
THD
<0.003%
SNR
=110dB
P3
Type
Headphone Amp+Preamp
MAX Power Output
-
Input
Bluetooth + RCA
Output
RCA+Headphone+AUX
Treble&Bass Control
THD
= 0.02%
SNR
=103dB
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.
