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
84audio

Showing 1 response by lak

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.