Preamp tubes in power amps


I’ve had tube gear for a decade but never, until recently, looked into how it functions or how to optimize it. So, my basic question is, my Rogue Magnum M-120 monoblocks have their power tubes, and then also a couple of 12AU7s and one 12AX7.

Would replacing those with NOS higher end tubes like a Seimens or a Mullard have much benefit?

Or would my tube budget be better spent replacing the new production 6922s in my BAT VK-3i with some higher end NOS tubes?

I figure I can’t afford to replace the power tubes until they die. But looking to see where the best bang for the buck would be on the preamp tube side of the equation.

Thanks to all who answer the actual question!
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Showing 1 response by oldhvymec

As one of the prior poster mentioned the amp is voiced different than the "OLD" tube or valve amps. Where an older valve amp may sound "Bright" or have harsh mids, a newer design takes advantage of that valves characteristics. 

NOS is kind of a spoof if you don't know what your looking for. They can cost a lot of money and offer ZERO.

Signal valves are a good investment net the money you spend.. DON'T get sold a bunch of high priced NOS. New reproduction are probably a better overall sound..

An older amp I might spend the money,  Mac, Marantz, Fisher, HH Scott, after a rebuild. BUT newer gear, Usually require a very quiet valve more than anything else.

Newer voicing doesn't count near as much as they use too on the actual quality of the valve "SOUND",  just NO microphonic.

No matter the amp.  A great RCA or Tellie black plate signal valve goes a LONG ways... I don't care who made the amp.. :-)

Regards