Review on Velleman K4005B Stereo Amplifier Output by Robert Pearson

Crappy amp: don't buy: waste of money. The main design flaw/defect is the use of 2 ICs as a preamp (they copied the circuit published by the IC manufacturer without any modification) which prevents the power amp from reaching the amplifier's rated RMS power, you don't even get 30W RMS and the protection jumps into IC and switches off the loudspeakers: very annoying: you can only play very quietly, otherwise the loudspeakers are constantly switched off. It also overheats a lot, the whole chassis generates a lot of heat as it would be a class A amp, which it isn't. You get a much better amp for a lot less money. A nefarious purchase/installation kit.