I've been lurking around for quite a while and have been thinking of getting a desktop amp for my K550's.
The thing is most people who haven't heard the K550 just recommend a cheap or no amp at all. I recently upgraded from my E7 to an E17, and noticed quite a big difference with these cans. I know that they are only 32Ω, but the majority of K550 users say that these cans benefit well from amping. Also, I found a post on Innerfidelity where someone mentioned they 'behave the same' in terms of volume output compared to a pair of HD650. Surprising isn't it?
So let me hear K550 owners: How effective is amping for the K550?