Do you think using something like a Goldpoint Mini-V Custom attenuator with a LOG curve would work? http://www.goldpt.com/prices.html

Seems b22 is rated at less than 0.01ohm... Any other factors to consider when pairing an amp up to a CIEM? Just breadboarded up a cmoy btw :) 1st step towards DIY amp heaven!

Would you generally recommend a portable amp for a set of high end CIEMs? Would there be any issues or major benefits when pairing the C4s to say something like a beta22? Thanks for the heads up btw!

I have a Yulong D18 and was considering purchasing a fully discrete Yulong A18 for use with a set of Frogbeats C4's, but I read the A18 review here and it stated that there can be a noticeable hum when pairing IEMs to the A18. I'm fairly new to the whole headfi space, and am looking for some...