Posting this in this thread as well.
@hrklg01 Heinz has kindly sent me a pair of the new "transparent" filter material that can be ordered now as part of new Mysphere 3.1/3.2 orders. I mentioned that I personally preferred the Mysphere 3.2's considerably brighter, more energetic signature without the tuning material (the stock sound is diffused flat and relatively more laid back in the treble), and Heinz came up with the idea of using a much more sonically transparent material (see below) that preserves the smoothness of the original filter's overall presentation.
I've been using the new filters and I love them
They do
exactly what Heinz describes - adding treble energy and a bit of crispness to the overall signature, while still being smoother than using the Mysphere's without any filter material. I ran my Mysphere's with the original filters on a Spectral power amp to get that extra bit of Spectral's famous treble "bite". With the new pads, I feel that treble energy is strong enough with the more laid back (and resolving) Nagra Integrated. The standard filters are closer to neutral, of course, and they are a bit more composed. You're basically trading off a bit of micro control for more treble energy. If you listen to electronic or strongly dynamic music and don't mind a bit more air in the presentation, the transparent filters are probably the way to go.
The "transparent" option will not cost extra with new Mysphere 3.1/3.2 orders. For current owners who wish to purchase a pair of the transparent filters, please inquire with Heinz about pricing.