Review on Bluetooth 5.0 Stereo Audio Amplifier Receiver - 4 Channel, 440W Peak Power Home Theater USB, 🔊 SD, FM - 2 Mic in Echo, RCA, LED - Speaker Selector for Studio, Home - MAMP5 by Oliver Waiker

This unit works as shown. Used to drive 2 indoor Klipsch wall/shelf speakers on "Channel A" and 2 outdoor Bose speakers on "Channel B". Its performance is more than sufficient for the simultaneous operation of all four loudspeakers. Each pair of speakers can be set to different power levels. The power level is retained when switched off and on again. For the price (even if the price was higher) to ask for more and nothing. I bought it despite the first reviewer calling this device "junk" and bought an Asurion policy if the first review was correct. At the moment I am completely satisfied and the device is highly recommended.