Greetings to all! I have a 5150 2x12 60w combo, with the stock (well played) speakers in. I bought the amp second hand. I fully retube (both preamp and poweramp) with JJ's when i first got it, and now i am thinking of changing the speakers in (I think thats Sheffield's in there). I would like to have your suggestion/opinions on that. I found that the oem speakers are lack of bottom end, its not that i dont like them averall so much, but i am thinking to improve the tone of the amp. I am thinking to install one of the 3 options. 1. A pair of EV12L Classic 2. A pair of Vintage 30's 3. A pair of G12M Heritage Greenbacks Have you ever used any of the upper speakers with the combo 5150? Les me hear your thoughts on that.