I have the Russian Teflon and the Russian K40y-9 PIO. I really liked what the PIO did when they first went in. I thought they were teflon's (Russian caps you can't what they are) but they seemed to smooth things out. With the Teflon it does not sound as good.
In another cap review I hear they are considered one of the best Russian caps. Ahhh another guy who thinks all plastic caps sound like plastic! I was shocked to find a small by pass reduces the plastic sound of poly caps.
quote from someone else on these caps.
"I must thank Bob B and Les Lemmars for kindly loaning me these K40y caps. After the usual rocky burn-in ritual, this PIO cap settled into a confident, natural sounding device. There are some audiophiles who rank these PIO caps as the best of the Russian military caps, including the FT-3 and K72 teflon caps. I may agree with this sentiment when it comes to utter naturalness and ease of presentation as well as the lack of a subtle plastic sound, which of course all plastic (film) caps have".
In another cap review I hear they are considered one of the best Russian caps. Ahhh another guy who thinks all plastic caps sound like plastic! I was shocked to find a small by pass reduces the plastic sound of poly caps.
quote from someone else on these caps.
"I must thank Bob B and Les Lemmars for kindly loaning me these K40y caps. After the usual rocky burn-in ritual, this PIO cap settled into a confident, natural sounding device. There are some audiophiles who rank these PIO caps as the best of the Russian military caps, including the FT-3 and K72 teflon caps. I may agree with this sentiment when it comes to utter naturalness and ease of presentation as well as the lack of a subtle plastic sound, which of course all plastic (film) caps have".