A while back, there was a request from some members for me to obtain and test these pads. (As an aside, I have noted the requests and will do my best to get to all of them. Just give me time. And by time, that could be months or even a year!). A shout out to FongAudio.com who has helped make this happen. What I have on hard are two versions of the hybrid suede pads. The hybrid pads are wrapped in leather with the surface that rests against the head suede leather. The insides are soft memory foam. One pad looks to be angled, the other is flat. I will compare these to the Drop ESP/95X pads. The Drop pads are velour with a foam which is a slightly stiffer. I find all three pads preferable to that of the stock ESP950 pads. Here are the three sets of pads lined from left to right: Vesper hybrid, Vesper angled, Drop ESP/95X. Note that the ESP/95X pads are mounted on the earcup of the headphone. Let's start with simple frequency response. Note that the sharp narrow dips in the lower treble and high treble are measurement artifacts (to be confirmed in CSDs in later post.) The Flat Plate Coupler was used here to get the most consistent relative results. Drop x Koss ESP/95X with 95X pads Flat Plate Coupler Drop x Koss ESP/95X with Vesper Suede Pads Drop x Koss ESP/95X with Vesper Suede Pads / Angled The FR measurements support my subjective observations. The stock 95X pads were mid-centric and laid back. The Vesper pads seem to have less emphasis in the mids while lifting the presence area with the slanted versions being the most flat sounding from the lows to mid-treble. As such, they are a bit brighter and less laid-back. Subjectively regular hybrid Vesper is arguably the smoothest in the highs. The slanted versions are close, have even smoother mid-treble, but at the expensive of some tizz just into the air region. The slanted versions also have more room inside the cavity, thus present a more open headstage. I will post CSDs in a bit as I feel the are more reflective what we hear in the midrange to highs compared to only frequency response plots.