<b>Product description:</b><br> TPA3255 is a high-performance class D power amplifier, it has class D efficiency and can bring true high-end sound quality. The device features advanced integrated feedback design and proprietary high-speed gate driver error correction function (PurePath Ultra HD). This technology allows the device to maintain ultra-low distortion throughout the audio frequency band while exhibiting perfect sound quality.<br> <b>Features:</b><br> 1.Adopt original TPA3255 chip<br> 2.Built-in high-power HIFI special high-efficiency switching power supply, directly inserted into 220V<br> 3.High precision chip resistor is selected to ensure good signal-to-noise ratio of the whole machine.<br> 4.The use of audio-specific inductive, to ensure that the sound is crisp and powerful.<br> <b>Note</b>: The initial password for Bluetooth connection is 0123.<br> <b>Basic Parameters:</b><br> Amplifier IC: TPA3255<br> Output power: 315W/4Ω 185W/8Ω<br> Bluetooth version: Qualcomm QCC3034 5.0 chip<br> Decoder IC:PCM5102 decoding<br> Bluetooth support: CRS8675-SBC/AAC/APTX/APTX-LL/APTX-HD 16-24Bit 44.1Hz-48Khz<br> USB decoding: 16Bit-48Khz<br> Frequency response: 20Hz-20Khz<br> Input power: AC100-240 50/Hz<br> Operational amplifier: NE5532<br> Signal to noise ratio: (SNR)> 111dB<br> Impedance: 4-8Ω<br> Quiescent current: 60mA<br> Work efficiency:.>90%<br> Output Power:<br> 315W/4Ω, distortion 10%<br> 185W/8Ω, distortion 10%<br> 260W/4Ω, distortion 1%<br> 150W/8Ω, distortion 1%<br> Product size: 101*93*184mm<br> <b>Package included:</b><br> 1Pcs TPA3255 Amplifier<br> <b>* Note: </b>The OP amp on this unit is upgradeable to a higher quality OP amp but only by a certified electronics technician. We do not advise customers to open the case and make any upgrades or changes as it may cause permanent damage to the electronics. Upgrading the OP amp voids any warranty by Aiyima and may pose a safety risk.<br>