I just had AVE install 2 Diamond 8's in my truck. It is in a stealth box that is very small under the rear seat. They told me they would sound great if they fit in the box. They fit and sound terrible. Not only is there no bass but nothing but distortion. The 8's are hooked up to a Keenwood 450watt amp. I trusted AVE's opinion but Diamonds are the only 8's they carry and i think they just sold them to me just to sell them. It sounds so terrible the stock radio was better.