Let's roll: what pre-amp tubes should I consider next?


I am looking for some guidance from experienced vacuum tube amp users. I have a Unison Research S6 (most recent model) which runs six x EL34 power tubes and two x 12AX7 pre-amp tubes.

Having gone NOS in the pre-amp section, I've had great results over the new manufacture Tung Sol 12AX7s that come stock with this integrated. The tubes I've played with are the Philips Miniwatt 12AX7s and the Siemens 12AX7s. I like what both have to offer, but there are differences. The Miniwatts being warmer and contributing to an overall more subtle listening experience whereas the Siemens are more precise, producing a sound that has attack, excitement and thrill in abundance. However, I find the latter can be a bit too much in the upper mid/lower treble region some times. Is there another new manufacture (thinking Psvane?) or NOS (Brimar, Mullard, Mazda) that would give me the best of both worlds? Good tone and timbre while maintaining a sense of involvement through speed and attack?

What are your recommendations?

funcrusha


funcrusha

Showing 1 response by wolf_garcia

I’ve noticed some clear differences between 6SN7GTBs that both my pre and power amp currently use, and NOS GEs are my faves for those. I continue to use 12AX7s in my guitar amps (and previously in my Jolida 502p amp also, although I no longer own that amp). I did wind up using Gold Lion 12AX7s though, as they sound great, are consistent, and are readily available.