TPA3255 Amplifier Class D 2.1CH Bluetooth 5.1 Stereo + Subwoofer 2x 300W + 600W Original ZK-AS21P AS21PX - 1. ZK-AS21P

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Product parameter :
Brand : Original Wuzhi Audio
Model 1 : ZK-AS21P (Potentiometer Internal)
Model 2 : ZK-AS21PX (Potentiometer External)
Output Power : 2.1CH 300W + 300W + 600W
Adapted power supply : 18-50VDC,
Recommended DC power supply 36-48V 12A or above.

Maximum power:
L & R CH 300W@50V, 4 ohm 160W@50V, 8 ohm
Subwoofer 600W@50V, 2 ohm 300W@50V , 4 ohm160W@50V , 8 ohm
In short, the higher the voltage, the smaller the resistance, and the greater the output power

BT chip : JL 5.1 transmission distance 15 meters
Input method : BT+AUX+USB disk/Sound card
Power AMP chip : Dual Original TPA3255
Protection : Input under voltage, overheating, over current, short circuit protection.
No input anti reverse protection, positive and negative poles cannot be reversed!

Power comparison between TPA3251 and TPA3255
Chip model : TPA3251,TPA3255
Fixed gain : TPA3251 20dB, TPA3255 21.5dB
Working voltage range : TPA3251 12-36VDC, TPA3255 18-53.5VDC
Stereo (BTL) : TPA3251 350W, TPA3255 600W

Power at different THD+N :

TPA3251
•Total output power at a total harmonic distortion + noise (THD+N) of 10%,
- 175W/4 ohm , bridged load (BTL) stereo
- 220W/3 ohm , bridged load (BTL) stereo
- 350W/2 ohm , parallel bridged load (PBTL) mono
•Total output power at 1% THD+N
- 140W/4 ohm , BTL stereo
- 175W/3 ohm , BTL stereo
- 285W/2 ohm , PBTL mono

TPA3255
•Total output power at a total harmonic distortion + noise (THD+N) of 10%,
- 315W/4 ohm , BTL stereo
- 185W/8 ohm , BTL stereo
- 600W/2 ohm , PBTL mono
•Total output power at 1% total harmonic distortion + noise (THD+N)
- 260W/4 ohm , BTL stereo
- 175W/3 ohm , BTL stereo
- 285W/2 ohm , PBTL mono

Power comparison between TPA3251 and TPA3255
Chip model: TPA3251, TPA3255

Fixed gain:
TPA3251 20dB,
TPA3255 21.5dB

Working voltage range:
TPA3251 12-36VDC,
TPA3255 18-53.5VDC

Stereo (BTL):
TPA3251 350W,
TPA3255 600W

Power at different THD+N:
TPA3251

•Total output power at a total harmonic distortion + noise (THD+N) of 10%,
- 175W/4 ohm , bridged load (BTL) stereo configuration,
- 220W/3 ohm , bridged load (BTL) stereo configuration,
- 350W/2 ohm , parallel bridged load (PBTL) mono configuration

•Total output power at 1% THD+N
- 140W/4 ohm , BTL stereo configuration
- 175W/3 ohm , BTL stereo configuration
- 285W/2 ohm , PBTL mono configuration

TPA3255
•Total output power at a total harmonic distortion + noise (THD+N) of 10%,
- 315W/4 ohm , BTL stereo configuration,
- 185W/8 ohm , BTL stereo configuration,
- 600W/2 ohm , PBTL mono configuration

•Total output power at 1% total harmonic distortion + noise (THD+N)
- 260W/4 ohm , BTL stereo configuration
- 175W/3 ohm , BTL stereo configuration
- 285W/2 ohm , PBTL mono configuration