Well, I don't remember what I ended up using for the JVCs, as this was a few years ago. I think they were just the same black round silicone tips that I've gotten with multiple pairs of IEMs. With the KXXS, I settled on some double flange tips I think I got from a pair of MEElectronics IEMs from back in the day, something cheap and forgettable. Wish I could find more than one of the triple flange... but the doubles have really good isolation and I don't feel they hold the KXXS back at all, very warm and clear and smooth with decent air and space for an IEM. I feel like at first I might have accidentally put on BLON tips? I really mean whatever I was doing was murdering my ears with treble, it was giving me headaches, yet with more than a few other tips, they are some of the smoothest and most unoffensive IEMs I've heard by far. With the Aurisonics, I typically use either spinfits or I think the tips that came with the Tin T2. The stock tips sound good but don't fit my ears well, the (I think) T2 tips fit better and are similar in that they're very short and barely protrude from the barrel, however they In all these cases, the tips can significantly change the treble response, shorter = darker and longer = brighter. The bore width also has a big impact, I think the wider the better but don't quote me on that since I don't exactly take notes. I think the Aurisonics are the most sensitive to tip rolling for sure. They are also the best IEMs I own, with a rich, creamy, dreamy mid-range somewhere between LCD2 and HD650, but fit the wrong tips on them and they are just very "meh", and that very dynamic mid-range can be kinda messy and muddy.