Luke, did you only try with your Tralucent iems? Aren't those basshead tuned monitors? This effect could be specific to them, maybe they are sensitive to higher voltage drive? Try it with IT03, for example. I went through at least a dozen of iems, from low to high impedance, and the more noticeable effect with lower impedance iems (under 10 ohm) is a deeper sub-bass extension with a little more sub-bass rumble, nothing overwhelming. I don't find AMP3 overdriving or saturating, but perhaps if Tralucent is a basshead iems by default tuning (I never heard these, but you guys in a basshead "club" always rave about it
), more sub-bass rumble can throw the balance off in this particular pair up. Please, do try it with IT03, I think you have that one as well? Do you have CB12/CB13 cables? IT03 w/CB13 combo (even at $455 price tag) can rival resolution/transparency/layering of some of the TOTL flagships at 2x-3x its price.