So I am having a problem with getting a good tone with a 6505 that is ruining my session. Here is the situation. I can't get enough gain or useable volume on either the rhythm or clean channel. As soon as I turn the post gain past 2 on either channel it becomes really muddy with horrendous lows/low mids and no highs. No matter how I set the amp it is always the same issue with the post gain. In front of the amp I have a maxxon 808. I have tried an LTD that has EMG 81's along with a les paul that has tone zones in it. I have used 6505's, soldanos, orange, marshal, bogner, all kinds of amps in the past and have never encountered this problem. Does anyone know what might be the cause? I know its hard without a clip but I am not at the studio now to make one. Thanks to all who respond.