I've decided to try Tubes


I have been going back and forth a while. I was thinking of the Yamaha AS2100 to replace my B&K amp (ZU audio Omen Def speakers). For some reason I now have a tube bug. I first thought about DECWARE and now thinking of Primaluna after reading great reviews. If tubes are not for me, both should be easy to resell. I have an opportunity on a Primaluna Prolouge 5 stereo power amp. It has autobias (which is a must for me) and is easy to roll tubes. It comes with KT88's which seem to have better lower end than el34's (from what I read). 35 watts per ch is more than enough to drive my Omen Defs loud if needed (101 db). 

Thought's on the PrimaLuna and ZU combo (Peachtree NOVA-PRE)? I listen to Classic Jazz, Classical and Classic - Prog Rock mostly. 


aberyclark
aberyclark,
Like you, I ran various B&K mosfet based amp systems for 25+ years and understand the interest in tubes if you like that warm B&K sound. The best was the ultra high current dual mono amps and last edition preamps before it all went to AV, ugh.  FYI:  ATI amplifiers bought the defunct B&K company as you may be aware. I recently learned that ATI is going to bring back the B&K brand, and I suspect it will be very different and updated with ATI designer influence behind it.  Years ago I eventually moved from B&K to Cary tube pre-amps/amps along with friends wanting to explore tubes. It's been a lot of fun messing with various tube amps, pre-amplifiers, mods/upgrades. Then one day I tried some of the more recent solid state gear and started playing with mixing tube pre-amp front ends with solid state back end amplifiers. It's another combination I waited way too long to try and now that I have, I will always have this combination and continue to search for a great back-end tube amp that can match it in sound quality, dynamics, and full deep bass. I thought I would never leave tube amps, and probably would not have happened until I heard a newer and much different solid state amplifier paired with with a tube preamplifier with really good NOS tubes. It's going to take a hell of a pair of tube monblocks to replace this tube pre and SS amp combo. The only recommendation I can make is to try (borrow/buy/return) different amps with your speakers until you find a match if you loved the B&K stuff. Took me several tube amps and ss amps to find a match that worked well.  Good Luck.   
Older thread, sorry to revive, but yes PL mates very well with Zu.  I currently own two PrimaLuna integrateds and 3 sets of Zu speakers (Cube, Unions, and Soul Supremes).  Check out a few of my recent posts on the Primaluna HP for getting the most out of it.  I would call my Dialogue 2 a great amp for the money, but with KT-150s the HP is simply a great amp period.  My experience is while the Zus are really, really efficient, they shine on all kinds of music with a push-pull at 40 wpc or more, or a nice vintage SS (my Cubes sound amazing with a Marantz 2265) of similar wattage.  I've tried a few 3-10 watt'rs and while they sound amazing at lower volumes and with acoustic/voice (still own a First Watt SIT-2 and 2 Transcendent OTLs), they lose a little punch and immediacy at higher levels or with more aggressive/complex music.
I would recommend the Atma-Sphere M60 Amps, Change the Stock Tubes to better 6SN7 Such as RCA or Ken RAD. You can thank me later :-)