I just posted this elsewhere. Retube my old 5150. Wanted it back to stock. Used ruby power and JJ pre. Never changed the power tubes and I've had it since the mid '90s. After the new install it sounds exactly the same. Like F.U.C.K. with punch you in the chest bass and loud enough to make my pants legs move and my concrete basement floor vibrate. Just like before I spent the money on tubes. Love my new 5150 III 2x12 combo. But the old Peavey 5150(6505) is hard to beat.