Steinberger Guitars SST-104 Light El.Guitar Set

Ho provato set di corde doppio pallino di diverse marche per la mia Spirit GT-PRO-Deluxe, ma queste sono quelle che mi hanno lasciato piu' soddisfatto dal punto di vista della qualità costruttiva generale (altre marche avevano addirittura lunghezze di alcune corde al limite dell'applicabilità sulla spirit) e della durata.
Il giudizio sul suono, potrebbe avere del bias, in quanto è relativo ai pochi set di altre marche provati (che non mi hanno entusiasmato).

I bought a Spirit by Steinberger GT Pro and thought I'd may as well buy an extra set of strings at the same time.
The GT Pro came supplied with a ser of .010's and I've always used .009's. String gauge changes on regular tremolo guitars are a real pain, to say the least! With the GT Pro I'd changed the whole set, adjusted the tremolo tension and stretched the strings ready to play within 5 minutes. Great strings, good tone and long life (I'm normally quite heavy handed and go through strings quickly, but these last a but longer than my regular branded strings on my other guitars!). Well worth getting these than buying a string adapter and using "regular" strings!

Because the double ball system is so rare, there aren't many options out there for us headless guitarists. There are adapters for the head but I haven't converted yet, so for the time being these are the best strings I can get for my Steinberger.
I've also tried the D'Addario double-ball set which I found to be surprisingly bad (and doesn't even fit an R-Trem properly)! These ones are okay, my first 2 sets have rusted a bit fast compared to my usual single-ball strings and the unwound strings felt perhaps too light for their gauge. If your headless can take single ball strings then pick your favourite set of those, don't bother w/ the double-ball ones. Otherwise, these are the best in that category.