The D175 uses an ES9038Q2M decoding chip for fast and stable performance Use Bluetooth input or fiber coaxial input, you can get a high resolution effect. RCA seats are gold-plated for greater durability The large heat sink ensures long-term stability, and the large capacity filter capacitor makes the power supply more stable and the ripple is lower. 129 or 5000 The D175 uses an ES9038Q2M decoding chip for fast and stable performance Use Bluetooth input or fiber coaxial input, you can get a high resolution effect. RCA seats are gold-plated for greater durability The large heat sink ensures long-term stability, and the large capacity filter capacitor makes the power supply more stable and the ripple is lower. Potentiometers are sealed and more durable. Product model: D175 Input : RCA, COAX, OPT, Bluetooth BLUE Power amplifier chip: TPA3251 Bluetooth version: Bluetooth 5.1 Frequency response range: 20-20KHZ Power supply: 24V-36V Output power: 175W x 2 or 4 Total harmonic distortion: 0.05percent Adaptive horn: 10W-200W 48 Bluetooth transmission distance: 10 meters Protection mechanism: power reverse protection, short circuit protection Self-restoring overheat protection Size: 100MM x 116MM x 60MM 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.