Jigster Posted April 18, 2012 Share Posted April 18, 2012 I'm currently using two EHX 12AX7's and a 12AT7 as my pre-amp valves. They drive the amp fine, but I wondered if there were any I can use that are compatible to the Bassman, that will allow less break up at high volume and offer a cleaner sound. Paired with the two basses I use which both have quite hot pick ups, the valves can get a bit fizzy. I realise these things are probably marginal at the high volume stage, but this current combination tends to break up a little too much for my liking. Any suggestions/thoughts welcome and pricing would be an issue so nothing too tope end please. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted April 18, 2012 Share Posted April 18, 2012 AT7 in place of an AX7. Quote Link to comment Share on other sites More sharing options...
thinman Posted April 18, 2012 Share Posted April 18, 2012 I'm a bit confused - I assume your amp has an input gain and a master volume? If so then doesn't turning down the input gain reduce the overdrive/break-up? Turning up the master won't usually drive the preamp harder and alter the sound - it should just increase the volume. Are you sure your not over-driving the power stage? Quote Link to comment Share on other sites More sharing options...
Jigster Posted April 18, 2012 Author Share Posted April 18, 2012 Yep you're right - I think I have been overdriving it - BUT, still feels a little fizzy Quote Link to comment Share on other sites More sharing options...
1970 Posted April 19, 2012 Share Posted April 19, 2012 not sure myself, but there's plenty of knowledgeable valve folk over on the musicradar forums who might be able to help you out Quote Link to comment Share on other sites More sharing options...
umph Posted April 19, 2012 Share Posted April 19, 2012 basically, you're not gonna get more volume via changing the valves. Quote Link to comment Share on other sites More sharing options...
Jigster Posted April 19, 2012 Author Share Posted April 19, 2012 no I know, but I'm enquiring more about the signal of the valve once at a high volume - how valves differ and which might be of a less high gain nature?? I think the prob lies largely in the input gain tho, as Thinman posted Quote Link to comment Share on other sites More sharing options...
umph Posted April 19, 2012 Share Posted April 19, 2012 [quote name='Jigster' timestamp='1334840741' post='1622171'] no I know, but I'm enquiring more about the signal of the valve once at a high volume - how valves differ and which might be of a less high gain nature?? I think the prob lies largely in the input gain tho, as Thinman posted [/quote] fair different valves have different characteristics, buy a few and do some valve rolling to find one you like. Not a fan of ehx valves at all. Quote Link to comment Share on other sites More sharing options...
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