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In Reply to: RE: thanks for the report posted by FenderLover on June 30, 2009 at 14:36:16
believe that the Svet's (=C=) have better vacuum than the xf1 and xf2, which I believe were made as "cheap
Steve,you hit it in a nutshell..The vacuum on the el34s especially the vintage ones are soft.That somtimes gives it a desirability on some frequencies as it tends to roll off the high end and by doing that, you hear more of the midrange and because the mids are where 85% of the music is,some may like it.
The history of the EL34 is kind of interesting because the MOV company,wanted somthing cheaper,and easier to build and easier to drive with a slim profile that would replace the EL37 which is esentially a 6L6gc .The el34 is what they came up with and it had mixed reviews.You had people like Peter Walker from Quad that tried the EL34s with the ESL 57s and that was a no go so he stuck with the Kt66s being they were more linear..This was a lot of the reason I never use an EL34 based amp with the Martin Logans or the acoustats..I could never get any high end or upper midrange detail but strangely,the 6ca7s worked fine.I think possibly the ESLs may produce back EMF by design and that could be why the EL34 reacts to them differently.
If the power supply waveform isn't pretty,neither is the sound in most cases.
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