Can the 323 effective drive the 507, or one would need to step up to the 006?   Also:   - What is the difference between the 323 II and the newer 323 S?   - Does the 600LE provide a better value for the money than the 006tS for the additional cost?   Thanks in advance.

How do these two amps DV336 and ASL MG Head OTL Mk III compare for 300- and 600-ohm headphones?   Also, what are the differences between the 336i and the 336se?

I am considering getting the Darkvoice 336 from China via eBay and would like to know how much US custom import duty I should expect to incur for such a transaction.   TIA

I am interested in recommendations on which version of the 880 -- 600, 250, or 32 ohms -- would be best for music listening with an AV receiver.  The music I listen to is mostly vocal jazz, folks, blues rock.   TIA.

I'm looking for comparisons of the iRiver Clix2 vs. Cowon D2 in terms of features and sound quality. TIA.

I came across a URL someone had posted in this forum for a comparison of V-Moda Vibe, Sony MDR-EX90, and Panasonic RP-HE70S IEMs, but now cannot find it via Forum or Google searches. Can someone please repost this link? TIA.

I'm looking for suggestions of headphones in the range of $100 or less that would be most suitable for listening to vocal jazz and chamber music on portable digital audio players. TIA.

How can I create a new subdirectory, say under Media/Music, on my ZVM? I had expected that there would be a "New Folder"-like option on the pulldown "File" menu of Media Explorer to accomplish this but it's not there.

What are the differences between these two Sennheiser headphones?

I'm considering getting the Panasonic SL-CT582V and would like to find out if anyone has tried using third-party rechargeable NiMH AAA cells as internal batteries for this player.