Gold lion tubes

Hay rodman99999, you ever head to head, left channel/right channel, with a MC275? GL KT88 left bank, GE Tungsols, 6550s in the right?

I have, seems like ALL the 6550 valves have better mids and highs, and the KT88s have better bass, low mids, stay pretty flat until 14-16khz and a 2-4 db roll off.
I still hear above 16Khz with no boost, and below 30hz with -6 db.
Looking at a graph, a KT88s a slight smile on the left side (20-200 hz)
flat until 14-16k the -1-2 db @ 14-16khz UP. Bell's palsy look, left smile, right frown.

6550s, climb from bottom to top ever so slightly,
-3 db @ 25hz and +2 db 16khz +3 db @ 18khz

When I use a GE, I like Tellies and RCAs in the pre position.
With KT88s I like Sylvania's, they brighten the tops a bit..but don't
boil my ears.

Sylvania power valve and Sylvania preamp valves, WAY to bright.
Serous ear boiling combo in a Mcintosh push pull setup.

I want to try a set of EL34s and KT88s in PSVANE, 2 sets of 6. 
They are some expensive valves, I REALLY like their signal valves.
Guy here on AG said to try them, I was pleased, but $$$$$$ WOW, expensive...

Regards

@oldhvymec I had a set of the Psvane EL34's the Phillips repro's that they do and found them extremely bright. I got rid of them after a few weeks. The repro GL KT-77 are the best current EL34 variant I've tried.

I've been using Mac, VTL, Marantz and as of late (last 2 years or so) Cary. I don't use Golden Lyon, I have A LOT of them here too. Just not my cup of tea. When I use a valve like Sylvania for power valves, I use RCAs or Tellies, in the preamp position. When I used Golden Lyon valves, I have to used a Sylvania preamp valves, to get every last bit out of, any of the four.. Mac. VTL, Marantz (been a long time), or Carys.

I prefer most of the EH valves from Russia, and had a great run with these new VERY cheap chinese valve. 4-6.00 per valve.
I match them on my new Maxi Matcher 2, and let um run for 24 hours in a 8 valve VTL test amp. That cheap valve with, PSVANE, RCAs, Tellies, Volvo, Mullard, Amperex, Mazdas, or GOOD GEs, in the preamp section works GREAT. 
That valve is brighter at the top, but smooth as silk in the mids.  
At 4-6 dollars per valve, in bulk. VS 25-50.00 per valve.

It just takes 25-50 hours to get them sounding their best, and weed out the failures. About 1 in 25, 4 in 100.  BUT you have to let them run at least an hour, and do the pencil tap test... They will "WIG" out.. if there is an issue..

I never could get the GLs to be bright enough. I use small planars, FEW round speakers. BUT I don't use valve amps in the BASS position. It makes a BIG difference how an amp preforms when they ARE or NOT doing bass duty..

I hear that PSVANE is a little bright in the Power Tube valve side, I can always tame bright. But to bring the LUSTER out, that's a different story.

Regards

Most of the guys on the McIntosh forum that have the MC275 use the Genelex Gold Lion tubes.  They claim their is no better tube than that.  I tried the Gold Lion 12ax7 tubes in my McIntosh C2500 preamp and did not care for the presentation.  I am back to the factory JJ tubes (McIntosh branded).