I can be a little more "frequency specific" in as much as I also use CJ amps, (Premier 12's) but I bi-amp my Apogee Duetta Signatures with them on the woofer panels...these handle low bass up to lower midrange and when I swapped out the SED Winged C 6550's with EH KT-88's the KT-88's did just what I had hoped: punchier, more extended and articulate bass control including a lower midrange that also stayed smooth and rich...I can't speak for the rest of the frequency range though so take my experience for what it's worth for you. Good luck
Replacing 6550s with KT 88s
I am currently using Winged C 6550s in my Conrad Johnson LP 70S power amp and am very happy with the performance etc. Some tube sites recommend an upgrade to Genalex Gold Lion KT 88s in place of 6550s. Would love to hear from CJ or ARC owners or others who have experience of this.
Many thanks
Pradeep
Many thanks
Pradeep