Using imported TPA3221 digital chip. The main filter capacitor adopts imported 1800UF    

The resistors are high-precision chip resistors to ensure a good signal-to-noise ratio of the whole machine.    

PCB adopts 1.6mm thick double-sided board, 2.0 oz copper thickness, and full tinning process to ensure good passing performance of large and small currents.    

The input and output use gold-plated RCA lotus seat, durable and beautiful!    

The board wiring is reasonable, beautiful, and low noise. Bluetooth uses Qualcomm QCC3034 module to support sbc, aac, aptx, aptx-HD. Bluetooth DAC uses PCM5102 to decode independently    

Main features of TPA3221:    

Wide 7-V to 30-V Supply Voltage Operation    

Stereo (2 x BTL) and Mono (1 x PBTL) Operation    

Output Power at 10% THD+N    

105-W Stereo into 4 Ω in BTL Configuration    

112-W Stereo into 3 Ω in BTL Configuration    

208-W Mono into 2 Ω in PBTL Configuration    

Output Power at 1% THD+N    

88-W Stereo into 4 Ω in BTL Configuration    

100-W Stereo into 3 Ω in BTL Configuration    

170-W Mono into 2 Ω in PBTL Configuration    

5-V Gate Drive or Built-in LDO for Optional Single-Supply Operation    

Closed-Loop Feedback Design    

Signal Bandwidth up to 100 kHz for High-Frequency Content From HD Sources    

0.02% THD+N at 1 W into 4 Ω    

60-dB PSRR (BTL, No Input Signal)    

 Less than 75-μV Output Noise (A-Weighted)    

 Greater than 108-dB SNR (A-Weighted)    

AD or HEAD Modulation Schemes    

Low-Power Operating Modes    

Standby Modes: Mute and Less than 1 mA Shutdown    

Low Idle-Current HEAD Modulation Scheme    

Single-Channel BTL Operation    

Multiple Input Options to Simplify Pre-Amp Design    

Differential or Single-Ended Analog Inputs    

Selectable Gains: 18 dB, 24 dB, 30 dB, 34 dB    

Integrated Protection: Undervoltage, Overvoltage, Cycle-by-cycle Current Limit, Short Circuit, Clipping Detection, Overtemperature Warning andShutdown, and DC Speaker Protection    

90% Efficient Class-D Operation (4 Ω)    

Pin-Compatible Family of Devices with Voltageand Power-Level Options    

Material:plastic    

colour:Black    

Package Contents:    

1 x Amplifier Board    

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.