Main use
1 Sylvania Gold Pins 5814A- highs are not in great control, metallic kind of and they are sucking with mids a bit, but bass is just great
2 Mullard ECC82 - simply very good tube, bit old and have some noise, but when new must be great. Bit like nr.4 but less mids, just little less, but the rest is pretty much the same, however the highs are more present as well.
3 Telefunken Smooth Plate - very, very good, but also old and a bit noisy, but when new would be on top. Highs more present/sweet, not harsh, just right, not overwhelming, but full mids and amazing controlled bass.
4. Mullard ECC82 CV491 - The best from Mullard line, I believe and that's maybe the true. Highs are smooth, overwhelming, not boomy mids, just all you can get and really good bass as well.
However with music like Marcus Miller the mids would blow your mind pretty easy, so you have to be prepare
That's why I was asking about the total different line of tubes, you know, just to try them out and see what happened.
I have read that AMPEREX 7316 are the best from Amperex ever made and I never heard one so far.
Raytheon been described as the best possible 12au7 as well, WINDMILL I mean or just 5814A
So, if I must choose is nr. 3&4 would be my first one and nr.2 as second, however may depend on music style.
Once again, thanks for your info.
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Originally Posted by Jon L /img/forum/go_quote.gif
It would help to know which 12AU7 you use now to steer you toward your wishes. In *general* for GS1000, I would assume you want to bring the midrange forward without making the treble/low-treble overly forward or more grainy.
All the amperexes you mention would do that to a degree; though, depending on the particular tube's condition, some might result still in some peakiness or graininess.
The Mullard longplates would really sweeten the upper-mids and bring out full mids and soundstaging but tends to have less apparent detail/texture. Might suit GS1000 really well, though. Buy the ecc82 versions, NOT the military M---- versions. I prefer the cheaper ecc82 versions.
The Raytheon you mention is probably the 5814 "windmill getter." Do NOT get these. These are extremely hard and peaky sounding where GS1000 doesn't need any more peakiness. The Raytheon 5814 you want are the early versions with D-getters. These are awesome, detailed, sweet tubes, probably the same tube as CBS/Hytron 5814.
My faves are Siemens Halske early 5814a, but you are likely not going to find any. It's also going to be too "neutral" for GS1000
If you have a few bucks, you might want to give the Electro Harmonix 12AU7 a shot. I found it surprisingly GREAT in certain tube circuits, often beating expensive NOS depending on the amp.
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