Very interesting results indeed. Good advice from 1-0-0-1-0-0-1 on the tubes.
In terms of warmth, I'm curious as to how long you had the Switchblade running before you made comparisons between that and the ZenTera. I know it is inconvenient for many people, but a tube amp really needs to be worked before you start getting a warmer sound. If you can get that pretty much instantly with the ZenTera then that is awesome. Good for you!
Another question I had was already answered, and probably explains a lot as well. If the Switchblade only has 2 preamp tubes in it, my guess is that neither of those is a rectifier tube. So because of that, you're not going to get a whole lot of warmth compared to other tube amps, and you definitely are not going to get any natural warm tube compression and sustain, or "sag" as it is called. Then again, the fact that a digital amp had more warmth to it, I have to admit, is a bit of a mystery to me. Tone circuit of course will also still say a lot about that in any amplifier. The tone circuit in the ZenTera is probably a far better design than the Switchblade.
You will still get more punch then a digital or solid state amp though, due to the 4 EL34s in the powerstage.
Considering the ZenTera faired better than the Switchblade, and I had little luck with the ZenTera, well, that leads me to think that the Switchblade is definitely not something I would enjoy, though I would still check it out for myself.
Edited by Deadwing, 26 October 2007 - 07:56 AM.