Yes, I really like the sound from that super ultrafilm when it works. The problem is that the film is really sensitive to temperature change. If you use it as the diaphram, you want to use thick spacers. Otherwise, your diaphragm will be very unstable. Even the heat from uour body could change the its tension.
If you like bass, then you want to make the headphones with good seals. My Omega and Orpheus clones both give wonderful bass. The JF clone isn't bass shy though. It's more natural sounding. It's more like you're listening to loudspeakers than headphones. As of now, it's my favorite.
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