lol sorry it's been a while. you guys need better speakers lol. i guess i did'nt know about the channel volume and will look into it. thanks for the post though guys. My wife was able to tell between them but she may have a good ear also. There is not a ton of difference there anyways. sh6 has more gain for sure. othewise I feel this was a great test than because all of the people who swear by bkp aftermaths could just save a few bucks imo.