Does it pay to upgrade tubes in power supply of preamp??


Hi- Just got a Canary Audio C1600 preamp= As my title states is there any significant change in sound when upgrading power supply tubes- the tubes are- (1)GZ34, (2) 6V6 and (1) 6SL7
If so any suggestions would be appreciated
The main unit uses 4- 6sn7 tubes- I know there are a ton of 6sn7 examples - has anyone upgraded the tubes in this preamp and if so any suggestions-
Also got the Canary M-350 amps- which use 4-300b per amp and 2- 6sn7's per amp- any thoughts on tube upgrades for these- as 8 300b;s will run a boat load of $$$$- 
thanks and Happy holidays!!
bopper

Showing 1 response by hansk46

In my ARC REF3 I replaced the powerregulatertube by a nos Tungsol 6550 black plate .This was a really great upgrade .All the 6H30P-EB tubes by 6H30P-DR versions , also in the powersupply .