Seriously K550 owners if you are wanting to get a little more midbass, sub bass and bass punch out of your phones try using an impedance adapter. I am using the one that came with one of my iems for airplane use (i believe it is 75ohm). There are adapters on ebay. I was listening last night with my Lyr again and that really brings the bass closer to the level of my HD650. Using that rig last night I got more out of my K550 than I have with any other setup. The separation and layering of instruments was phenomenal. The nearly open sound of the K550 got even bigger. Vocals and guitars shined with a realism and just the perfect sparkle and detail.
I was just PMing a buddy that these phones have just suddenly moved to a SOLID number two on my favorites. By far my favorite closed cans at this point ever.
K550+impedance adapter+lyr =
I looked at these because someone in another thread once suggested it to me when I was hearing a hum on my Darkvoice. I've since discovered the culprit (it was the power tubes) and forgot about it. But this...this tickles my fancy. You think one of those Hong Kong cheapies on eBay would have the same effect?