headphone amp question

You can take a look at the HA-160 or the 160D (with dac and preamp) both have nice synergy with sennheisers.

Maybe you can explain a bit more about your problem.

I think a good solid state amp with your headphones sound good. I think finding a Gilmore Lite is an excellent amp. If you must go tubes then the Little Dot MKIII does a terrific job. Subjectively I prefer the Gilmore Lite but the LDMKIII is hardly a slouch. Plus you can tube roll if that's your choice.

You might want to bring your question over to Head-Fi.org, if you can tolerate the signal/noise ratio of the posts there. There's a whole bunch of great headphone amps that would work well with the 580 as they're not that difficult to drive. It really depends on your budget and expectations/goals. I recently heard Schiit's new Lyr amp with a few different cans and was very impressed. You might also consider upgrading the headphones if headphone listening becomes a priority. There are many options that sound significantly better than 580's to my ears, but certainly always at some significant cost increase. For the $ they are a very good headphone.

Thanks to all. S/N too low at headfi. The music she doesn't appreciate is the loudspeakers, thus, the idea of a move to cans. I like all of the ideas so far. I know that listening is the real solution, so I will buy the most likely candidate and sell it if it doesn't work. I also know I can't generalize about SS vs tubes. I'll keep the 580s for now. Great ideas. I'm open to all suggestions except different cans.

Agree with the Woo recommendation. I've got a 22 and swear by it (works great with my T1s and my LCD2s, with some tube rolling for each). The 6 / 6 SE has lots of fans too.