I normally don't write long or extensive reviews, but this product has really exceeded my expectations! I recently bought a pair of NOS AKG K340 headphones from a Headfi member in Austria. Thanks JeckyllAndHyde! I have been using a borrowed HeadAmp GS-1 amp, until mine arrives from HeadAmp next month, a Harman/Kardon HK3490 receiver, and Marantz CD5003 and CD5001 cd player with them. I have been listening to a WIDE VARIETY of music, including live, acoustic, classic country, classic rock, pop, r&b, etc., on them. They are definitely the...