2. amps-preamps
  3. 152896-81194

tube rolling with Schiit Freya +

Just purchase  a Schiit Freya + preamp and would like do some tube rolling. The preamp is connected to  pair of  Passlabs X260.8. I really like the sound but want to experiment with different variants of the 6SN7 tubes.

Schiit customer service sent me an overview of different tubes with some descriptions of their characteristics which helps but I thought this forum of any  users based on actual  experience would also help. I'm looking for a fatter ( more tubey) sound with emphasis on the midrange

Thank

O

oglethorpe

Showing 2 responses by melm

melm
1,057 posts
 
Whether or not the Freya+ needs break-in (and I think it needs very little) new tubes need a good deal of break-in to sound their best.  NOS need perhaps 50 to 100 hours of use.  Current production perhaps half that.  The time can be reduced by just letting the tubes burn for a couple of days.

Most (or should I say many) so-called NOS tubes don't need that much, or any, for they are not NOS, but really pulls that may test as NOS.
melm
1,057 posts
 
The major heat in the Freya+ does not come from the tubes.  The tubes are effectively external with many vent holes surrounding them.  The heat comes from a point between between the tubes and the transformers. 

My best guess, and it is only a guess, is that the heat emanates from the rectification for the regulated 300V rail.
More to discover