I put these strings on a Harley Benton mahogany parlour guitar, hoping for a good bass sound despite the small size of the instrument. I wasn't disappointed. The basses have a good, round resonance and there was no whine or rasp in the trebles, which is a common problem with small guitars. I have been thrashing at these strings for about 20 playing hours now, and they still chime out beautifully. I will buy them again.