There's also the PA2V2 and it might help the Grado sound as it is very slightly warmer with a decent soundstage. Reminds me of my fullsized integrated in a way. Battery I get well over 100 hours. Far as I know it is a high current amp. Has no issues driving most of my headphones including vintage orthos ( I set gain at 3/4 ).You can also get in there and adjust the gain screws at any point, but if you let Gary know what you will be driving he can do it for you and save you the trouble.
Guaranteed for life no questions asked.... and Gary ( who makes them ) is stellar with customer service, one of the greats.
If you ( for some odd reason ???) found it wasn't for you they don't last long in the for sale section here I noticed.
There's plenty of reviews in here. Great little unit and reasonably priced.
Hard to beat as a "first" amp. Heck it's been my "first" portable amp for ages now just getting back into portable stuff again.
browse through the photo gallery there's a bunch of Grados also :)http://www.electric-avenues.com/audio6.html
Edited by nick n - 3/31/13 at 9:46pm