The filters come with a set of tweezers, and just hitting the side of one of the preinstalled ones is enough to remove the old ones. No disassembly except removing the ear tips. May take a few tries to do but even an adequately steady hand can manage this.

The Olina filters are a soft, gauzy thing that are easy to bend, so it’s good that they include 12 in a package. They just stick on with an adhesive ring in the same place as the metal ones you removed.

I didn’t notice much of any change to the bass. The overall tonality is certainly warmer, but that may be from a loss of some of that treble spike. That much I can definitely say is affected.

You can replace the filters on the S12 series to dull the treble a bit. I used the “TRIPOWIN X HBB Olina” filters from Linsoul and prefer the outcome.

I’ve long been tempted to buy some vintage cans and update them with modern drivers and try to tune them myself.

I just got these, as someone deeply suspicious of wider-nozzle IEMs... and they are exceptionally comfortable right now, to the point where I may end up selling the rest of my small collection. They are more to my taste than the Aria at the same price, due to the improved imaging.

They aren't anywhere near as "fun" as the S12 or Timeless, but a moderate bass boost could really make these sing.

This is pretty normal with dynamic drivers if you've ever opened one up. It's mostly the planars which get huge.