I currently have a pair of Heir Audio 4 A.I and I LOVE THEM. I am now thinking about getting the HD650. What amp and dac would work best with these cans? Also, would the HD650 sound similar to the clear 4.A.I? If not what cans would be a good choice.   Thanks :D

I am looking to replace my ipod classic 160gb with another DAP (ipod is getting old). I have a pair of heir audio 4.AI and run it into a rendition 1 headphone amplifier. I just want the most clear and most neutral sounding DAP. Can anyone give me recommendations, I really like the Cowon Z2. ...

Hi, I just purchased a pair fo the Heir Audio 4.ai's. What amp with built in EQ would be best to give it a little more bass, if possible? I really don't know where to start!!!!. Thanks

Should I pull the trigger on the 4.ai or just wait for the 5.a? Has anyone tried them yet? Thanks

I am looking for a new pair of IEM. I listen to alot of classic rock, some acoustic, jazz, country,metal, classical.. so pretty much everything but the majority is the classic rock. I would perfer them to have detachable cables and be as neutral sounding as possible. Soundstage/Presnetation and...