tube upgrade for first sound

Has anyone been able to improve on the stock tubes in the First Sound preamps? I was thinking about trying the Russian 6H23. Any thoughts? thanks

84audio12-22-2003 3:27am

drubin Details Discussions Posts This discussion Message User 3,274 posts 12-22-2003 at 06:17am Copy Comment URL Report Comment Edit Delete The only upgrade I have tried is the Siemens Gold Pin 7308, which sounds superb to me. It's what Emmanuel Go of First Sound recommended to me and is definitely one to try if you can find it. But they are hard to find and expensive, so I'd be very curious to know of good alternatives.
lak Details Discussions Posts This discussion Message User 4,646 posts 12-22-2003 at 02:22pm Copy Comment URL Report Comment Edit Delete Try the Siemens CCa Gold Pin 7308 (as mentioned above) along with the Sovtek 0A2 as the other tube. Have them both Cryo'd, or purchase them already cryo'd. The sound and dynamics will be improved.
swklein Details Discussions Posts This discussion Message User 136 posts 12-23-2003 at 03:20am Copy Comment URL Report Comment Edit Delete I've very much enjoyed the Russian 6H23s I've tried from the Cable Company in my Audio Research SP9 Mk III preamp. They stomp the stock Sovteks into the ground. Worth a try.
brooksl Details Discussions Posts This discussion Message User 129 posts 01-03-2004 at 05:19am Copy Comment URL Report Comment Edit Delete I have some cryoed Telefunkens in my First Sound. The are fantastic - dead quiet and dynamic. Beautiful sounding tubes. I bought them from TubeWorld.com. They are costly but I really wanted the return policy if I did not find the performance justifying the price.
Post removed Aug 12, 2015