I have played around with the Tone2 for about two months now.
My first question is, how those filters differ from an objective viewpoint. What do they do with the audio signals? I found some information for the brick wall filter, but for the rest, no luck. Would love to hear some explanations or to see some references to explanations.
Having tried the different filters, I have a hard time to figure out which filter I like the most. I have tried 2 different headphones and 4 sets of amp/speakers combos. First impression: It is very difficult to hear any difference at all, and often I am not sure if I only imagine hearing a difference. Would love to read about your experience.
As for now I can say, that with one speaker set, the difference was tremendous. Switching to linear slow made this speakers “open up”, I felt more integrated into the experience. Have to ask the friend who owns them which pair it was. I think it was a pair of Edifier R1700BT. I think he also had some Edifier R1280DB, which also sounded better with a different filter, but the difference was not as apparent as with the R1700BT.
Then I have a set of custom made speakers with about 20 year old visaton drivers and an harman kardon HK 660 amplifier. I cannot hear the difference between the filters, but I felt like mini slow sounded the nicest on them. It sounded a bit more well rounded.
At last I tried the filters with a pair of Criterion TA T-160 with an Aura VA-50 amplifier (I think), which btw. sound marvelous together. Could not perceive any difference by using different filters.
I own 2 crappy headphones, one 50€ in-ear pair and a HyperX Cloud gaming headset. Could not make out any difference using different filters.
Generally I feel like the slow filters feel more “natural” and “warm”, but I think they are a little less precise. Brick Wall seems to be very precise, but I am not sure yet what the drawbacks are.
Looking forward to learn from your knowledge and experience.