Replacing 6550s with KT 88s

Sunnyboy, my amp is an ARC VS-115 which originally came stock with 6550C tubes. Since then ARC switched out to the KT-120s, which is what I used now. Bought the KT-120s from Upscale Audio. In my opinion, the KT-120s better the 6550C tubes in pretty much every way. If your amp can handle the extra current demands, consider the KT-120s. But check with the factory first!

Rodman
Check out the Well Audio Labs (Singapore)site. I reckon the prices are competitive vis a vis some other online sites.
Bifwynne
Many thanks for the tip. Will contact CJ and hopefully get a response before I set out on my travels .
Happy listening
Pradeep

I have 20 low hour cryo'd Winged C's. I went back to KT88 and much prefer them for overall warmth and sweetness. Are the Winged C's hard to find since the factory burned down?

Arthur, Kevin Deal at Upscale just sourced a whole bunch of SED 6550 C tubes. Just bought one for my ARC Ref 5 linestage. Seems to work just fine. Price is still reasonable.

I procured a set of Genalex KT 88s from Well Audio Labs, Singapore,last week and spent the better part of the weekend comparing the 3000 hr+ Winged C 6550s with the new KT88s.What immediately struck me was that despite some 3000 + hrs there was little to choose between the 6550s and the KT 88s. There was a smidgen more smoothness and air in the upper frequencies. After extensive listening comparisons done with NJ-Come Away With Me lp, the KT 88s are superior in the context of my system and my listening preferences.
Many thanks for all your input/advise.
Happy listening
Pradeep