The amplifier has a fairly small size for its power and can be connected to accommodate or mount almost anywhere. Whether the specified output of 4 x 75 Watt true RSM I can not judge. The performance brought after connecting, however, met my expectation. One small problem I have trotzallem to the amplifier, where a little fault also lies with my radio. The intrusion of the amplifier is quite quick. Here is a time delay with slower increase in its performance would be desirable. I have a 2-DIN car radio on Windows-based, which requires a little longer to höchfahren. Due to the rapid launch of the amplifier, the startup noise of the car radio to be transferred increasingly to the speakers. This can unfortunately not reduce the volume control on the radio. Therefore, from here with no full-Star Rating