Bluetooth uses the OCC3034 Bluetooth module, which supports APTXHD lossless transmission. Bluetooth decoding uses PCM5102, making the sound quality of Bluetooth comparable to wired transmission. The op amp uses JRC5532, which has a pluggable design and can be upgraded by yourself. The power amplifier chip uses ' TPA3221, which can output 105 watts per channel, which is quite powerful. The large radiator ensures stable operation for a long time, and the large-capacity filter capacitor makes the power supply more stable and has lower ripple. The D200A RCA socket is gold-plated for greater durability. Product model:D200A Input mode: RCA, Bluetooth BLUE Power amplifier chip: TPA3221 Bluetooth version: Bluetooth 5.1 Frequency response range: 20-20KHZ Power supply: 24V-32V Bluetooth chip: QCC3034 Bluetooth decoding chip: PCM5102 Output power: 105W x 2/4 Total harmonic distortion: 0.05% Adaptive horn: 10W~200W 4 8 16 Bluetooth transmission distance: 10 meters Protection mechanism: power reverse protection, short circuit protection, self-recovery overheating protection Size: 135MM x 156MM x 46MM DC power socket specifications: 5.5 x 2.5 color: Black Material: aluminum Package Contents: 1 amplifier 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection 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.