Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier, 300W x2 Wireless Amp, TPA3255 2 Channel Mini Class D Integrated Home Audio Outdoor Stereo Receiver with Bass Treble Control for Passive Speakers
Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier, 300W x2 Wireless Amp, TPA3255 2 Channel Mini Class D Integrated Home Audio Outdoor Stereo Receiver with Bass Treble Control for Passive Speakers
High-Efficiency: The chip amplifier has replaceable Op-Amps for a custom approach when compared to the BT20A amplifier. Further. you can swap the 2 plug-in NE5532 Op-Amps for LME49720HA. MUSES02. OPA2604AP. OPA2134PA. LM4562. or NJM4556AD Op-Amps to achieve distinct sound qualities. It boasts an SNR≥108dB and THD≤0.005%
Bluetooth 5.0 Connectivity: The Bluetooth pair can be removed by pressing and holding the volume control for 5 seconds. and it also has a memory function for easy pairing and an alert tone for convenience
Custom Sound with Bass and Treble Controls: The BT20A Pro home audio amplifier has a sound control design so that you can experience sound without effects by setting treble and bass effects to the middle point
Package Contents: The package contains a BT20A Pro power amplifier. a Bluetooth antenna. a 32V/5A power adapter. an AC cord. and a user manual
*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.
1Bluetooth 5.02Treble/Bass Control3PRE-OUT1Power Variability2Back Side3Front Side1TPA3255 CHIP2Replaceable OP CHIP3High Power Inductors1. 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.. 4Ω/8Ω) 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.