TPA3255 Bluetooth 5.0 Power Amplifier 325Wx2 Bluetooth QCC3034 APTX Stereo Audio Amp Sound Amplifier Speaker             1. Using TPA3255, QCC3034 Bluetooth 5.0 chip; The main filter electrolytic capacitor uses 1000UF / 50V imported from Japan to ensure strong power support.  2. Adopt special high-current inductance of red and gray ring for audio to ensure the sound is crisp and powerful.  3. PCB adopts 1.6mm thick double-sided board, 2.0 ounces copper thickness, and full tin-spraying process to ensure good passing performance of large and small currents. First-class PCB quality.  4. All-aluminum chassis is adopted, and the surface of the chassis is processed by wire drawing oxidation coloring process   5. Input mode: analog and Bluetooth input function. When both modes are input at the same time, Bluetooth input takes priority. After Bluetooth connection, RCA input is automatically disconnected; when analog input is required, please turn off the Bluetooth function of the mobile phone before switching  Product description:  TPA3255 2.0 Stereo Bluetooth Digital Amplifier (Bluetooth 5.0 APTX 300W + 300W)  TPA3255 is a high-performance Class D power amplifier, which has Class D efficiency and can bring true high-end sound quality. The device features an advanced integrated feedback design and a proprietary high-speed gate driver error correction function (PurePath ™ Ultra HD). This technology allows the device to maintain ultra-low distortion throughout the entire audio frequency band while exhibiting perfect sound quality.  The main parameters:  Working voltage: DC24V-42V (recommended DC36V, excessive voltage and severe heat)  Size: 160 x 126 x 42mm, antenna length 105mm  Total output power when total harmonic distortion + noise (THD + N) is 1%  (240W / 4 ohm) x 2  Total output power when total harmonic distortion + noise (THD + N) is 10%  (325W / 4 ohm) x 2  The Bluetooth module supports sbc, aac, aptx, aptx-HD decoding  colour: silver/black  Material: ABS    Package Contents:  1 x Bluetooth Power Amplifier/>colour: black  Material: ABS    Package Contents:  1 x Bluetooth Power Amplifier    Only the above package content, other products are not included.  Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.