We are starting to hear some nice reports on these tubes. I've toyed with the idea of giving a pair or two a try in my Atma-Sphere M60s. Please keep us posted as they burn in.
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jmolsberg I am using Sylvania 12AT7 and the original Tung Sol SN7.I think the Sofias would sound excellent in the M2 but it's working so well in the amp that I have no desire to try them now.But I will give it a try anyway this weekend just to satisfy both our curiosities and let you know.One caveat is the Sofias are quite a bit taller and would require a new lid from LTA to accommodate them.
I tried the Sylvania SN7s - too veiled,JJs - meh,EH - hyper detailed.The Tung Sols don't do anything wrong,but they don't have that sweet organic midrange and seem too polite?congested?un-dynamic?
@winoguy17 thank you!
I use both Sophia Electric KT88 and 6SN7s and love them over everything I have tried. Recently tried Psvane Shuguang WE 6SN7 that comes with a 1 year warranty and they are stellar; rich, awesome clarity and super quiet.
Recommend you give these a try, these are much cheaper in comparison to Sophia with 1 year warranty and are so close in SQ to the Sophia. Joe from Psvane, a vendor here on this site has been awesome in answering all of my questions and fast shipping.
I am so impressed that I decided to try their WE KT88 and should have them in two weeks. This new tube design and material selection allows you to hear so much further into the recording with clarity I just can't believe; it's like there's nothing between you and the performers.
Wig, thanks for the heads up on the Shuguang WE 6SN7s. My M-60s take a total of 8 6SN7s, which gets a bit painful at ~ $200/tube. Fortunately, the tubes don't require matching and the amps seem to like a mixture of different tubes. Right now I've got a mixture of RCA grey glass, Bad Boys, and old stock GE GTBs. I ordered one pair of the new Sophias. After those burn in, I will probably get a pair of the new Shuguangs. It is really good to see some current production tubes that are equaling or surpassing the best tubes of the past.
@jmolsberg I went ahead and swapped in the Sofias in the MZ2 last evening after reluctantly putting the Sylvania back in the driver socket of the amp.In that configuration the sound took a giant leap forward that caught me totally by surprise.I put on one of my favorite cds Hot Tuna - live at new orleans house in Berkley and started to leave the room to let the system warm up a little while I finished cleaning up the kitchen.Holy shite!!Three hours flew by while I kept saying gotta listen to this and this and that and just one more......So what was so startling is the soundstage immediately deepened and increased in width,the lower mids/upper bass warmed up but retained detail,the instruments and vocalists seemed to 'solidify'and give the illusion of better three dimensionality.The transients weren't as razor sharp but the sound was never syrupy or tubby.The timbre was gorgeous.Detail + Beauty.Dammit now I want to try one in the amp again along with the two in the MZ2.If that works out then I'd need three more for back ups.This is your fault jmolsberg;)I might have to try the Pvanes at half the price.
Today I enjoyed the following and could find no fault with any genre:
John Mayall +Bluesbreakers - Silvertones
Blood Sweat Tears - Greatest Hits
Joan Baez- Ring Them Bells (live)
Neil Young - Unplugged
Jethro Tull - Aqualung
Otis Spann - Good Morning Mr Blues
Steve Earle - various downloads
Recording of my son singing and playing guitar
Apologies for being overenthusiastic.I'm not associated with the company at all,just another happy tube nerd.I hope the Sofias will prove reliable over time and I'll update periodically.
I received a pair of the Sophia blue 6sn7s yesterday. Bottom line is they beat out a pair of RCA grey glass in my AtmaSphere M60s. With no burn in, the Sophias were sweeter, smoother, and more detailed than the RCAs. I find this remarkable given the fact that the RCAs are well regarded and that the M60s take 4 pairs of 6SN7s. I'm not sure I expected such an improvement after replacing only one pair. I will likely pick up one more pair soon. Very nice tubes. Kudos to Sophia.
I received another pair of the Sofias to try one in the driver tube position of the Aric Audio amp.Turns out it was too much of a good thing,lol!The sound became overly euphonic which was so pretty, especially on sax and piano with the added harmonics.But it was really too much.That's ok since I like having back ups.Today I swapped in a EH(which I'd thought hyper detailed) in the driver socket.Beautiful and refined!So the LTA is keeping the Sofias and a new lid to accommodate the taller tubes is on order.
So the final set up is:LTA MZ2 two Sylvania 12at7,two Sofia Blue 6SN7
Aric Audio Transcend Push Pull amp one EH 6SN7,two Sylvania SN7,four Tung Sol KT150
I'm glad you're liking them brownfan!
@jtcf Thanks. I've been through the drill before with the M-60s, and yes, it takes a bit of time, but I have a pretty good feel for what the amps like in terms of 6SN7 attributes at each of the 4 positions, so its not quite as bad as trying to work my way through all of the 256 possible variations. In actual fact, this comes down to a yes/no on two of the 4 positions, with the new Sophias potentially replacing the RCA grey glass tubes. Those two positions have the greatest impact on sonics. The third position (back, center, one the MK 3.3s) really seems to benefit from the bad boys. Assuming I like what I hear with Sophias in the two most impactful position, it really comes down to getting a quick A/B on the bad boys vs. two other Sylvanias that I have on hand. Tube rolling in the 4th position (front tube), which requires GTA or GTBs, has less impact on sonics. I always roll that position after I have the other 3 established. I can probably get this done in 3 or 4 listening sessions, so it is really not all that laborious.