I don't know about the newest Khozmo attenuators thus the question, Wells Audio uses now Goldpoint attenuators to avoid that issue.

In the past Khozmo stepped attenuators have had popping issues when adjusting the volume, are these ones free of such issues?

What was wrong with it?

What's your source? It could be an issue with the signal timing.

It depends a lot on your ear geometry, measurements use an average ear shape so you might get different results.

Has anyone compared these to Grado PS2000e?

There are more things to it than FR, assuming the EQ you apply doesn't add too much distortion then they should sound very close. Some headphones don't EQ that well, and some have wonky FR that cannot be smoothed out.

Either one should be ok.

For desktop use I prefer 4 pin XLR, it's more robust. If you plan to use it on the go, then 4.4mm is the better option.

Cerakote H series is what he offered when I bought my set. https://www.cerakote.com/shop/cerakote-coating?finishes=cera_h_series

CDs are in general outdated, I don't know why companies started pushing CD transports. CDs can be ripped and then you can use a DAP or a computer to play them without the inconvenience of having to handle the physical media.

Do you see the light in the cable? It should be a red light on the other end.

I think he should raise prices so demand matches production.

The hype will eventually die and these will be available, you just have to wait.

Woo Audio has them available https://wooaudio.com/headphones/austrian-audio-the-composer and they published this https://www.instagram.com/p/C2NgdLcOrC6/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA== on Instagram.