D315N uses in-line capacitors in key positions of the audio circuit to eliminate the cold and cold problems caused by chip capacitors. The op-amp part uses JRC5532, and the op-amp seat design is convenient to replace more advanced op-amps by themselves. The power filter part uses a capacitor array composed of multiple capacitors, which has many benefits, faster charge and discharge, lower ripple, lower internal resistance, and better sound Bluetooth uses the OCC3034 Bluetooth module, which supports APTXHD lossless transmission Bluetooth decoding uses PCM5102, making Bluetooth sound quality comparable to wired transmission. Product model:D315N Input mode: RCA, Bluetooth BLUE Power amplifier chip: TPA3251 Bluetooth version: Bluetooth 5.1 Frequency response range: 20-20KHZ Power supply: 24V-32V Tube type:6N3 Bluetooth chip: QCC3034 Bluetooth decoding chip: PCM5102 Output power: 105W x 2/4 Total harmonic distortion: 0.05% Adaptive horn: 10W~200W 48 Bluetooth transmission distance: 10 meters Protection mechanism: power reverse protection, short circuit protection, self-recovery overheating protection Size: 150MM x 146MM x 90MM DC power socket specifications: 5.5 x 2.5 color:Black Material: aluminum Package Contents: 1 x Power 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.