Fosi Audio BT20A PRO - 48V
Class D amplifier 2x225W 4 Ohm - Bluetooth 5.0
The Fosi Audio BT20A PRO is a compact and powerful Class D amplifier, offered at a very resonable price.
For its connections, the BT20A PRO is simple and efficient, with stereo RCA or Bluetooth 5.0 input, and plated speaker terminals output as well as a 3.5mm jack pre-output.
On its front, the BT20A PRO has a tone control allowing you to adjust the level of bass and treble, in order to adapt the reproduction of the device to your audio system and your preferences. In addition, a bluetooth pairing history deletion function is now available by holding down the volume button for a long time.
A Bluetooth code may be requested to connect to the amplifier, it is "0000" or "1234".
A high-end amplifier chip
Its amplification stage uses a high-end TI TPA3255 amplification chip, capable of developing a power of 225W under 4Ω per channel. All while providing clear and detailed sound reproduction.
Customization of operational amplifiers
The DIP8 format OP-AMP NE5532 chip is easily replaceable. This can allow you to get your favorite sound signature.
Front and back view of the BT20A PRO
| 1 | Power indicator |
| 2 | Power switch |
| 3 | Treble control |
| 4 | Bass control |
| 5 | Volume control / Erasing Bluetooth pairing history |
| 6 | RCA Stereo input |
| 7 | Jack 3.5mm pre-out |
| 8 | Speaker terminal |
| 9 | Power plug |
| 10 | Bluetooth antenna |
Technical characteristic
| Specifications | |
|---|---|
| Product type | Amplifier stereo |
| Amplification type | Class D |
| Input | 1x RCA stere'o Bluetooth 5.0 |
| Output | Speaker terminal Pre-out jack 3.5mm |
| Amplifier chip | TI TPA3255 |
| Output power | 2x 225W / 4 Ohm @ 48V (1% THD) 2x 300W / 4 Ohm @ 48V (10% THD)2x 110W / 4 Ohm @ 32V (1% THD) 2x 135W / 4 Ohm @ 32V (10% THD) |
| Accepted impedances | 2-8Ω |
| Frequency response | 20 Hz-20 kHz (± 1,2 dB) |
| THD | 0.005% |
| SNR | ≥ 108dB |
| Bluetooth Codecs | ACC SBC |
| Tone control | Bass / Treble with midpoint |
| General | |
|---|---|
| Power supply voltage | 24V-48V DC (AC adaptateur included) |
| Dimensions (L*P*H) | 166x105x35mm |
| Net Weight | 547g |
| Color | Blue |
| Package | 1x Fosi Audio BT20A PRO 1x Power supply 48V 5A |
