I personally couldn't tell ya! I have yet to pick up a pair, I may pick up the Silver Acme though. Here's another shot:
Stock tips don't come with an internal channel so they float on the stem of the ED4, exchanged for the KZ Comply's (which are freakin awesome, I should add!) and they slid all the way down the stem, so I've got a decently deep insertion.
OOTB Initial Impressions:
Puts on, sounds like crap out of my m2, throws onto my phone and choose Sublime radio. "Once Again" by Island Roots Riddim comes on... Wait, are these KZ?
Double check, yep definitely. I keep listening and I'm fathomed by their clarity and BALANCE. What, a normal sized driver with horror bass being balanced!? I'm confused too, don't worry.
These sound PHENOMENAL. I put them back on my m2, and threw on "abnormalize" by Ling Tosite Sigure since I know the song quite well.
Separation is amazing, there's plenty of microdetail but it's slightly veiled. TK's voice sounds so natural and true to the song, the quick strumming and distortion of the electric guitars sound awesome. I compared these to my Rock Zircons and they're damn near identical in sound, with the ED4 feeling a bit more balanced across the bass spectrum. Some more listening seems to have revealed a hyped treble,
@TwinACStacks might get a headache from these. Seems there's slight sibilance on loud cymbal clashes and possibly some loud, high freq. synths.
"Gula Redeux" by deadmau5 you can really feel the sub bass wobbles, and the piano shines beautifully but isn't drowned out by the background synths. The drop has amazing separation and once again, insane coherence. There's a decently wide soundstage here, honestly. Everything is just so damn coherent, and I've been ONLY listening to my HD598 lately. These compliment quite well.
Hope ya'll enjoyed my first ever impression/review for an OOTB.