Ok here is the deal. I have been looking for a decent amp for a good metal tone but tubes are just too loud for living in an apartment. After allot of research I have rules out modeling amps because I don’t want a bunch of sounds I want a rock and metal sound only for now. I have a little Marshall 15 head and just borrowed a peavey rock master preamp. I’m running it through the clean channel. Is there anything negative about doing this? It gets me allot closer to that sound I have been on the hunt for but it’s at low levels and well basically really cheap fix for now. How long do tube preamps last? How should I hook it up?