Biannuzzi22 27june23
"I am seeing a lot of chatter about upgrading the CS2.7 speakers. Can anyone send me instructions on how to do this? In particular, it looks like using the Clarity Purity 1uf 800v capacitors is a good upgrade? Where are these located and how would I replace what is currently on the crossover?"
Crossover upgrades are, at this time, conversational rather than commercial. I hope to eventually have plans and kits, but not yet. The CS2.7 is the final Jim Thiel-esque product, developed after his death, but by the original in-house team with outsourced engineering help, and built in Lexington with traditional classic methods. It qualifies in my thinking as genuine and worthy of upgrade.
Clarity’s Purity800-S is their hands-down winner. Its internal circuitry is more sophisticated than the other PUR caps, plus the thick copper end caps and silver wire refinements. All that said, I find that replacing the stock Thiel styrene/tin - film/foil 1uF ’yellow’ cap with the PUR800 1uF is a lot of money spent on marginal improvement. I suggest you rather might consider unifying the split/bypass cap into a single PUR800-S where most appropriate (eliminating the bypass.) Your best prospect is the tweeter series feed which is now comprised of a 15uF PP and the 1uF yellow bypass. Replace them both with a single 16uF PUR800-S. (That leaves potential for a more sophisticated bypass, in the works, at a later time.)
The weakest link in the 2.7XO is the 400uF electrolytic cap in the midrange feed. I am working on an all-film solution which is not yet ready. My first focus is on early products to keep them up and running. New midranges and tweeters will bring later Thiel driver technologies and longevity all the way to the early designs. As various caps are finalized I’ll announce here. Stay tuned – a lot is presently coming together - I anticipate real progress this year.
