Bluetooth Power Amplifier Introduction

1：The product uses the latest Bluetooth BT4.0 module (CSR-BC7), effective reception distance of approximately 15 meters to 20 meters.

2：A2DP Multipoint Support

3：Standard:BT4.0,BLE,Class 1.5

Frequency Band:2.402G ~ 2.480G

4：Maximum Data Rate:3Mbps

5：For a variety of Bluetooth devices to receive.

6：Power amplifier modules ,use TDA7491HV 20 W + 20 W dual BTL class-D audio amplifier, Low power consumption, no heat sink。

20 W + 20 W continuous output power:

RL = 8 Ω, THD = 10% at VCC = 16 V

■ Wide-range single-supply operation (9 V - 16 V)

■ High efficiency (η = 90%)

■ Four selectable, fixed gain settings of

nominally 20 dB, 26 dB, 30 dB and 32 dB

■ Differential inputs minimize common-mode

noise

■ No ‘pop’ at turn-on/off

■ Standby and mute features

■ Short-circuit protection

■ Thermal overload protection

Key Functions：1：Play / Pause，Long press the button for 5 seconds Bluetooth is opened，Red green indicator lamp flashing alternately, search for Bluetooth devices (CSR-BC7), only the green light flashes, Bluetooth pairing success.。

2：The next choice key,Long press the button = increase volume，

3：The previous choice key, long press the button = volume reduction.。

4：Bluetooth the red and green indicator lamp flashing alternately。

5：Volume control potentiometer and power switch.

6：Two speakers connected，20W8ohm

7:DC input voltage:DC9-16V

8:PCBA size：91.6mm*50.2mm