For two points of reference that I’m familiar with, Rondos sound consistently good for a very long time, whereas Obligatos tend to die precipitously. My local shops favor Thomastiks for their longevity and consistency, but of course they still vary. I’m currently playing on a set of Dominant Pros (~60 hours in) but have my eye on the Kaplan Amos when these eventually sour.
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Yes, I know they are not used by professionals but I thought I would mention them.
Concerning Tonicas, I’ve used them before but didn’t use them long enough to determine their useful lifespan.
On the other end of the spectrum is Evah Pirazzi. So many of my customers have said the same thing to me over and over: they die after about two weeks of regular use. The A strings are notorious for going bad if you look at them the wrong way.
I’ve found Tonica to be in the middle—pretty good life if kept well, although not necessarily as long as Dominants.
Personally I really don't care for Kaplan Amos.
The Warchal Karneols (inexpensive enough to replace every 3 months) I tested were lovely and balanced, but they took a lot more work to produce a sound; hence, I’m back to the DPs. There have been favorable reports here on Warchal’s Brilliant and Amber sets, but I don’t know how the longevity is for those either.
Jeff, was it just the texture or also the sound of the Amos that you didn’t like? They’re around $50 on sale.
Pirastro does better, way better longevity with their wound gut strings, save for perhaps their A string windings. That said, Perpetual Cadenza lasted a good long time for me (have never tried the original Perpetual for violin save for its amazing, platinum E,c which I do use and enjoy.)
I think that Warchal Brilliant are a good value as well, if they are still selling them. The Timber and others are newer (and theoretically better), but those older strings hold up well against any synthetic "competition", IMHO.
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