Features：
300 Watts x2 Power Output: Provided by the TI TPA3255 chip which features an advanced feedback design and proprietary high-speed gate driver error correction. In addition to excellent audio performance, TPA3255 achieves both high power efficiency and very low power stage idle losses below 2.5W.
High Efficiency: A significant upgrade from the BT20A amplifier. There're two plug-ins NE5532 Op-Amps can be replaced by MUSES02/OPA26041P/OPA2134PA Op-Amps etc. To create a different sound quality. SNR≥108dB; THD≤0.005%.
Upgraded Bluetooth 5.0 connectivity: By pressing and holding the volume control for five seconds, the Bluetooth pair can be cleared. In addition, it has a Bluetooth memory function, so it can be easily paired the next time. It also receives an alert tone.
Sound Control: With its unique design, the BT20A Pro amplifier for home audio has a wide range of bass and treble controls. Alternatively, you can turn the treble and bass effects to a middle point to listen to the original sound without effects.

Specifications：
Model：BT20A PRO
Output Power：300Wx2 @4Ω
Terminating Impedance：2-8Ω
Input Mode：Bluetooth + RCA
Output Mode：Passive Speakers + Pre-out
Frequency Range：20Hz-20kHz(±1.2dB)
THD ≤0.005%
SNR ≥108dB
Chip Set：TPA3255
Bluetooth Transmission Distance：Up to 50Ft
Bluetooth Transmission Format：SBC/AAC
Device Dimension：5x5x1 inches
DC Input Range：24-48V
Power Supply：32V 5A

What‘s in the box？
BT20A Pro Power Amplifier x 1
Bluetooth Antenna x 1
32V 5A Power Adapter x 1
AC Cord x 1
User’s Manual x 1