New tubes or new preamp?

Good advice all...I've recently upgrades my speakers to Magnepan 3.7's, and bought a Magtech amp. Still not getting the sweet sound I'd like. As I tried new tubes from ARC and still wasn't where I'd like to be, thought either a tube upgrade or a new tube pre might be the way to go..I can't audition, due to the fact there are no dealers anywhere near, so I"m looking for some guidance for those here who have listened to a lot of gear I can't.

I'm prepared to spend some money if the return is there, but want to make sure the difference in expense is worth it....
Thanks for your input...

When I had the LS15 I researched getting different tubes and was told by a few reputable dealers that the LS15 was not a good candidate for tube rolling, that the benefits would be minimal.

There were two versions of the LS15. If you have the older version (most easily identified as it has a captive power cord) then the cap and power supply upgrade by ARC is a very cost effective improvement.

Brrgrr,

After reading your 2nd post, I don't know if you will get the results you want by getting a new preamp. It looks like you want something to deal with your 3.7's not having a "sweet" type of sound. Getting an LS27 most likely won't help. If anything, its a more transparent preamp and will further enhance what you don't like about your speakers.

Given that, I think you have 2 choices. The first choice is to buy equipment in an effort to cover up what you don't like about your speakers. Its a very tempting option, but almost never works. You'll just end up spending a lot of money. The 2nd choice is recognize that you may have bought a pair of speakers that are not for you. If thats the case, deal with the issue directly and get a different pair of speakers. For me, personally, that would be the way to go. Deal with the problem and be done with it.

"Still not getting the sweet sound I prefer"..........If by 'sweet' you mean rolled highs or midrange warmth, I'd agree with Zd542. It is very hard to change the fundamental sound of speakers by changing amps etc. That said, however, IMHO the electronic's you seem drawn to are not noted for their warmth. Detail, transparency, speed, etc, for sure. Warmth, not so much.

FWIW I've never thought that panel speakers matched to SS amps, etc, were a match made in heaven for folks who want warmth/sweetness. But if you think a tubed pre-amp will do it look for something that is noted for it's warmth/sweetness
not its transparency etc. ARC would not be my first choice buy some margin, neither would a Modwright, fine though they may be.