The speakers are really great for the price. Installed is the whole thing with an adapter in the Renault Clio, BJH 2007 original radio. From a certain volume of the bass has to be screwed down. However, only in a volume in which it hurts in the ears. The bass is top for 13 cm speakers. You may not print as bass from a subwoofer to expectations, but it's enough so far that one spührt the bass on the body and passengers surprised by are sounded. I have installed 4 speakers, one each in every door.