Review on Enhanced Wireless Home Audio Amplifier System - Bluetooth Compatible Sound Stereo Receiver Amp - Advanced 6 Channel 600Watt Power, Digital LCD, Headphone Jack, 1/4'' Microphone IN USB SD AUX RCA FM Radio - Pyle PTA66BT by Brandon Patterson

TL:DR; non-stereo left and right amplifier. mixes in mono and then amplifies. The amp worked for a few months before it failed. Easy to fix but terrible design. The arrows in the picture show where I had to replace the zener diode and resistor. These two components form the primary section of the +12V bus, which controls all front panel logic and mixers (except for the digital section, which is powered by the 5V bus). These components failed after a few months of operation, causing the blue light to go out and no longer performing. Since the old resistor had burned out beyond recognition, I replaced it with a 330 ohm resistor that would supply the +12V rail just under 12V and hopefully minimize the overall heat generated by this linear voltage configuration. You can also see the yellow arrow in the image pointing to the mixer resistors that combine the left and right channels into a mono channel. Again, this is not a stereo amplifier! Mixes in mono. As a patio amp or general home amp, I think that's fine. but would like to know before buying. General Complaints: Bluetooth works but is a bit clunky. At first the handles worked smoothly, but after a few months of operation everything started to creak. All internal components are non-elastic to reduce vibration damage. The built-in fuse is in the box instead of the case on the back.