replacement valve for SWR STUDIO 220

[dub]

Hi There

I am looking for a replacement valve for the SWR STUDIO 220.

A valve that will give good low end response and a subtly saturated sound when the gain is set quite high would be ideal.

The obvious choice is a groove tubes valve, as the preamp was built on a grooves tubes design, but even there there are a few choices.

Any suggestions and descriptions of tone would be really helpful.

[geoffbyrne]

Post #7 here:

http://basschat.co.uk/topic/278695-12ax7-pre-amp-valves/

G.

[BassBod]

You won't notice much difference - Groove Tubes were neighbours to the original SWR factory, and branded valves rather than manufactured. I suspect reliable supply (and reliable specs) were most important. Any modern 12ax7/Ecc83 should sound fine.