New tubes or new preamp?

I got a set of tubes from ARC and they were so microphonjc I Sent them back. Really want to know if spending money on an older per is worth it versus a new one.

There's more to a preamp than just the tubes. For me, the preamp is the most important piece in the system. (Providing you don't mess up matching your other components.) Get the LS-27. Its a big upgrade.

A set of good old stock tubes will change the presentation of your LS-15. I have tubed rolled a few LS-15 and LS-25 WITH VERY NICE RESULTS but if it is a major improvement you seek you should consider moving up to a better preamp of which there are many to look at.
Dennis
PrimeOne Media

Brrgrr, So far, I haven’t heard an amplifier that couldn’t be improved by upgrading the stock tubes. So, that might be enough for you; it frequently was for me - at least until I found and could afford a clearly superior amplifier. As a rule, I consider it highly advisable to seek out the right tube set for any amplifier.

Tube rolling can be chancy, expensive and frustrating; all of which become worthwhile once you find the right set. I tend to think of the manufacturer supplied tubes as a sort of blind date chosen for consensus appeal. I appreciate the effort, but only I am listening to my music with my system in my room.