HMS TPO MATCH cables

On listening, myself and six other people all picked the '0' impedence setting in all cases. We used it with a placette/ayre/eidolon system and a CR Developments Romulus/gallo system. It was not a scientific test.

I liked it for the airy quality it lent the presentation.
The higher impedence settings did seem to lower the noise floor but also took away the airy quality.

I also tried many settings and combination settings and wound up leaving them on zero. Guess I didn't need the impedence boxes after all. But I do find the cables superb.

I too tried many settings and combinations of settings. I ended up leaving them on zero. I also guess I didn't need the impedence boxes. But I do find the cables to be very good.

I too have left mine on zero. You might get some suggestions from the manufacturer if you give the output and input impedances of the items you're connecting. Excellent cables overall, give up very little to the much higher priced cables in my system.

Please let me, as importer of HMS, explain the impedance box settings in detail:
Not in every case you will need a different setting, although it is good to know that you are ready for the future. You will eventually change a component and suddenly you might need a different setting. With HMS you are always prepared for any system changes, the cables will grow along with your system.
The goal is to find the setting which lowers the music volume between 20% to 30% . Now use your volume control to raise the music volume to the level you like. This should be the perfect HMS TOP Match Box setting, since the sonic signal should now be far less distorted.