OK, I put the Dekoni suede pads on my Caldera today and did some listening. It was a strange experience.
Physical component:
1 - These pads were rather difficult to install because their backflap is twice or more wider than the ZMF pads. That meant the Dekoniās backflaps couldnāt fully insert in the slots that run around the edge of each earcup. Thus, the installed pads move around more than Iām used to. Theyāre not secure.
2 - The Dekoni pads are considerably deeper (~1/2") than even the ZMF lambskin thick pads, the deepest of the 4 ZMF pads made for the Caldera. That meant that when I put the headphones on w/the Dekoni pads, the clamp force was much greater; also, the fit of the entire headphone was tighter. If I intended to keep the Dekoni pads on the Caldera, Iād have to let out one or both earcupās slider a notch.
Sonic component
This is where it gets interesting. I expected the sound of the Dekoni pads to be significantly different (and significantly worse) than the ZMF lambskin thicks. But that didnāt happen. The changes in sound were audible, but not onerous or excessive. The Dekoni pads didnāt push the Calderaās sound away from what Iāve come to know. Specifics:
1 - Tonally, the entire bass portion seemed to be shelved down a little. Not a lot, and not a problem. But some of the slam and pressure of the bass diminished with these pads, yet not in a way that detached the bass from the other frequencies, causing an imbalance. The sound was still very good.
2 - Thereās a bit more air in the upper mids and the treble with the Dekoni pads. This change isnāt even close to becoming bright or edgy, just a bit sharper and more distinct.
3 - I couldnāt be sure without seeing measurements, but I thought I heard a relatively narrow spike in the upper midrange, where certain transients, especially drums/percussion, jump out a bit more. I noticed it, but again, it wasnāt excessive or problematic, just not quite what Iām used to with the lambskin thick pads.
Net/net: The Dekoni pads are very well made and their sonics with the Caldera are relatively discrete and sensible. Some might really like these sonic changes, which mostly consist of putting more air in the treble.
However, while these sonic changes arenāt excessive, theyāre also not really to my liking. Between that and the physical discomfort these pads brought, I wonāt continue using them with the Caldera.
But I must give credit: these pads are very well made, feel great in the hand and against the skin, and do relatively restrained, interesting things to the sound. Theyāre not super expensive, though theyāre also not cheap. Overall, I can recommend them.