Bests & Worsts Reviews from Amazon

This is a clean sounding amplifier with only the controls one really needs. So its great for my parents who don't have the frame of mind to fiddle with too many controls. However, be aware of power supply issues. 1) I bought two of these at different times from Amazon. Both did not ship with power supply - even though they claimed to include them. Amazon has not corrected the product description even after I told them about it. 2) The shipped power supplies were to be a 2 amp one and a 6 amp one in the second case. 3) If you run this amplifier from a 2 amp power supply - here is some news for you. The theoretical max watts your system can deliver would be 12X2 = 24 watts - However, since the amp is running around 80% efficiency - you can get approx 24X0.8 = 18 watts max from this amplifier (best case scenario) or around 9 watts per channel. The problem comes as you drive the amplifier harder. The power supply voltages will start dipping, and as it does so, the amplifier will distort. So your clean sounding amplifier, won't sound so clean after all once you drive it past 7 - 8 watts. 4) To really use this amplifier with low distortion at high volumes, you should use a switching powersupply that delivers 12 to 13.5 volts at 4 amperes. 6 amps is a bit of an overkill, but recommended if you will be using 4 ohm speakers. 5) You cannot use this amplifer with an un-regulated transformer type powersupply rated at 12 volt. Their no-load voltage can be anywhere from 15 - 20 volt and can even be dangerous if connected to this amp - since the supply capacitor is rated at 16 volt. 6) Don't forget the log relationship between perceived loudness and watts - a 100 watt amplifier is only double the loudness of a 10 watt amplifier. So this amplifer does fine to fill up a room with sound using reasonably high efficiency speakers (I am using Bose 301's). Just don't expect to pump your subwoofer with it! 7) There are two LED's inside. Not sure why only one of them lights up (in both the amplifiers I purchased). 8) Its tone control implementation can do with a bit of improvement.