M19-BT Amplifier Stereo Receiver,100Wx2 HiFi Class D Amp,Mini 2 Channel Digital Home Audio Component,Headphone Amp w/RCA/Optical/Coaxial/Mic Input for Passive Speaker with DC 24V Power Adapter

This is a great little amp. The Bluetooth works great and it has impressive power for the price. I received it yesterday and had it setup in 5 min. ran speakers for 6 hours straight at 75% volume and the amp never got hot. Sound quality was great and the bass and treble adjustment were a nice touch.

Works great !!

Small size but big sound

Works great, only complaint is that every time it turns on or changes input it loudly says what its doing. Cant disable this or adjust volume. 'BLUETOOTH MODE, CONNECTED' 'LINE IN' tried muting when switching input, nope. Tried turning all knobs low as they would go. Nope. Great device wish i had volume control on the system alerts

does not disconnect speakers when headphones are plugged in. Remote only turns unit on an off all other buttons do nothing. Voice announcing mode is way too loud. useless for my application.

Very simple to set up and works way better than I expected!

The whole concept sounded perfect for my intended use but unfortunately there were some problems that made it completely unsatisfactory.1) The BT connected, and worked very well and sounded okay with my smart phone but when I switched the amp to the optical output from my high end CD player, the sound was very very distorted just like it is when a CD is played through a video disk player.2) The volume control works very strangely; when set to low levels it seems normal but there is a point at which the volume output jumps noticeably and the sound becomes distorted. I say "distorted" even though it is not of the typical clipping, harmonic or intermodulation type. Instead artifacts associated with digitizing become apparent and very objectionable.3) The LED lighting surrounding the volume knob can be very useful when setting the controls but also visually very annoying when not turned off once the controls are set.The amplifier appears well thought out and well made with quality components and if it weren't for the distortion when using the optical input, it would be a very good amplifier.

Based on the latest Motorola chip this amp is amazing sound wise. The Bluetooth capability is a bonus. My daughter teams the amp up with a pair of Polk bookshelf speakers. The only annoying thing is the power block is the same size as the amp.