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 ramses

AMPEREX PQ A-FRAMES, HOLLAND MADE MULLARDS & TUNGSRAM WERE THE BEST I'VE USED. THE SIEMENS WERE TOO MUCH LIKE SOLID STATE.
THE AMPEREX & MULLARDS LET SECTIONS OF THE ORCHESTRA LIFT OUT OF THE ACOUSTIC ON CRESCENDOES JUST AS IN LIVE PERFORMANCES.
THE ABSOLUTELY BEST MIDRANGE WAS FROM EARLY PRODUCTION (50'S) BUGLE BOYS, BUT THERE LIMITED DYNAMICS/EXTENSION WAS APPARENT ON ORCHESTRAL RECORDINGS, BUT ON SMALL SCALE RECORDINGS, THEY ARE THE BEST.
FOR NON-CRITICAL LISTENING, THE ROCKET LABEL 6H23'S FROM UPSCALE AUDIO WERE A GOOD CHOICE FOR ME.

CORDIALLY,
RAMSES