Summary: These retail at 300$ .
I got them for 80$ here.
For the price i paid - they are extremely good.
The sound is clear and neutral.
The soundstage is good for a closed can, the bass is punchy and tight, the mids are extremely good with lots of details. although I find the treble to be a bit lacking for my taste. other than that - they sound amazing.
they can be easily driven with an ipod or a phone. they also have an inline mic.
if you get these under 100$, it's a steal.
Pros: neutral sound(no treble or bass boost), clear mids, smooth and laidback highs.
Summary: The AH-D340 is the entry level model in the Music Maniac series, followed up by the D600 & D7100. The headphone is also promoted as a portable solution for music lovers. The 40mm driver provides very good performance and clarity. The 36 ohm impedance value made it friendly with most portable devices (tested on iPod Classic & Nano). I did try using the Fiio E11, which actually only seemed to improve performance slightly but colored the sound more than expected.
Pros: beautiful mids, excellent detail with no bass bloat!
Cons: Neutral presentation, especially in the bass region - may not be for all! looks and portability.