https://www.massdrop.com/buy/massdrop-x-nuforce-edc3-in-ear-monitors See general measurement notes before digesting the plots below: http://www.superbestaudiofriends.org/index.php?threads/note-on-iem-measurements-changelog.2153/ Massdrop x nuforce EDC3 Frequency Response In a nutshell, they sound like Audezes in IEM form. Darkish and laid back, even including the slight midrange bump. Bass is solid and impactful - moreso than the Massdrop + IEM. Don't know driver arrangement for sure, but I'm guessing two bass drivers and one for highs? The caveat is that these sound more neutral from devices with slighter higher output Z (iPhone, Pixel, etc.) because of its impedance curve. From ZX2, just slightly less laid back than the LCD2C. From iPhone, close to neutral with gentle highs. These are good things. I like these quite a lot.