Digital Bluetooth Amplifier 2x20W

The stereo amplifier from DFRobot receives music via Bluetooth 5.0 and drives two passive speakers, with 2 × 20 W to 2 × 40 W depending on supply and speakers. It is powered with 5 to 24 V DC. With a Raspberry Pi or a smartphone it becomes a small Bluetooth speaker. Protection against reverse polarity and short circuit is built in.

Note: With 4 Ω speakers at most 16 V, with 8 Ω at most 24 V. Above 26 V the chip is destroyed. DFRobot recommends speakers from 40 W.

Features:

Bluetooth 5.0, range up to 15 m line of sight
Two channels (stereo) for passive speakers with 4 Ω or 8 Ω
Volume adjustable with thumbwheel
Protection against reverse polarity and short circuit
Bluetooth name XY-P40W, acrylic case included
Power supply with at least 2 A recommended, speaker cables at most 1 m
Low supply voltage at high volume can cause noise: lower the volume or raise the voltage
Keep away from Wi-Fi routers, the Bluetooth chip is sensitive to electrostatic discharge

Application Examples:

Bluetooth speaker with Raspberry Pi or smartphone
Running passive speakers wirelessly
Music in the workshop or hobby room

Documentation:

DFRobot product page DFR0675

Technical Data:

Manufacturer: DFRobot
Manufacturer SKU: DFR0675-EN
Power supply: 5 to 24 V DC, above 26 V the chip is destroyed
Bluetooth: 5.0, range 15 m line of sight
Channels: 2 (stereo)
Output power at 1 kHz: 2 × 20 W into 4 Ω at 12 V, 2 × 30 W into 4 Ω at 16 V, 2 × 30 W into 8 Ω at 21 V, 2 × 40 W into 8 Ω at 24 V
Speakers: 4 Ω at 5 to 16 V, 8 Ω at 5 to 24 V
Dimensions: 55 × 38 × 15 mm
Weight: 31.4 g