Review on 🔊 Premium 100W+100W Bluetooth Subwoofer Audio Amplifier Board - Treble and Bass Control, BT and AUX Inputs - DC 9-24V - 2.0 Channel Stereo AMP Module for DIY Speakers by Beth Martin

, this amp from Wuzhi just works. Bluetooth audio is transmitted with absolute clarity. Audio over the 3.5mm jack is just as good as over a wired analogue connection. I'm using it to replace a broken amp on a set of Boston Acoustics 2.1 speakers (2 x 50w satellites and a 100w woofer) and it sounds just as good as the original amp 13 years ago. has a low price: - switching the volume to the "off" position does not turn off the device completely; I notice a small spark every time I plug in the power. The lack of a Bluetooth passcode means anyone can easily connect to it, so it's not ideal for parties. To switch from Bluetooth to analog mode, the Bluetooth source device must be completely disconnected. Bluetooth on the amplifier cannot be deactivated. Even in analog mode, Bluetooth is always on.