davidak napsal: mám v EBS valve drivu Svetlana 12AX7. Někde jsem čet, že v něm zkoušel měnit lampu za EH, ale že změna moc velká nebyla, snad že EH měl trochu víc vejšek
citace z TB:
Originally Posted by scotch
The Valve Drive is one of the few single-tube pre's that really does sound different with different tubes. The differences are usually subtle, but I did compare a bunch of tubes I had on hand when I got my Valve Drive. I found my notes from my testing (I recorded the Valve Drive with various tubes & then listened back later):
Svetlana 12ax7 very compressed & focused with medium overall output
Tung Sol 12ax7 lots of extra "air" and extended lows with "gritty" distortion characteristics
Sovtek 12ax7WA extra mids & very punchy, almost too punchy; very low noise floor
vintage RCA 7025 scooped mids with good lows- very clean, but lower output
Mesa ECC83 (probably Chinese) very high gain, loudest output, very smooth top end that gets smoother with more gain
GT 12ax7R edgy & a little brittle sounding, medium output
I greatly preferred the Tung Sol to the other tubes. It really gave my Valve Drive and almost Neve like top end. I use the pedal for very subtle always-on "hair" & the Tung Sol really nailed it!
For "crunchier" rock type tones, the Mesa ECC83 really shined, but that's not what I wanted out of the Valve Drive (I have other pedals for heavier od...).
Both the Tung Sol & old RCA provide killer clean tones if you want the Valve Drive functioning as a clean preamp. The Tung Sol has more going on, but the RCA was very "honest" sounding.
The stock Svetlana that came with the pedal was fine, but I really like how a couple of the other tubes really "opened" it up.
Of course, all of this is totally subjective.... But, I kept good notes & had an open mind during testing. As always, YMMV!
The Jack, The Pearl, Palatino EUB, Cort GBMP3, GK 200RB 1981, Ampeg B200R 2008, Peavey Centurion III 1978, Peavey 118 1978, MB PH 112, EBS MBII