I played a solo concert recently on a bass fitted with these strings .
The tension is low, compared to Spirocore mediums but not so low as
to be flapping around. They have a bright front edge (pizz and arco) and a fairly full sustain. They work pretty well arco and I think after working with them for some time would be quite nicely balanced between pizz and arco.
Because they are wound with copper (I think) they make a lot of noise with finger movement... I imagine a lot of people would hate this but playing solo, that tempted me into some different areas . I did have a lot of fun !
Listening back to the recording I was surprised how little the finger-string-noise stood out. Overall the recorded sound is really nice - full and punchy. So, I ordered a set to try out on my German bass .. :)
These strings definitely won't be to everyone's taste but they are well made and I'd recommend anyone to check them out .