It is not an iem - it really needs the headband. ( which is an engineering marvel - just amazing ) The little arm that holds the ear piece pivots down to bring the tip into contact with the ear canal. The ear piece has that acoustic chamber that can be detached - this allows for heavier damping of the backwave. The top end does roll off but no more then any stock yamaha, and it makes for a pleasant listening experience, but not for the people who like razor shards in their...
Having modded 2 of these and per report them sounding very good, there is a little more than creatology but it is not rocket science. I doubt Joe is using any foam damping but I may be wrong. The measurements of the modded headphones are exceptional.
Thought I should feedback on the sound too - build went without a hitch per pics I posted earlier. Only issue I had was that the PC would not recognize the unit but after fishki slapped me about the head a few times I realized how silly the problem was. The doodlebug has to be connected to the dac first and then plugged into the pc - has been working without a problem for at least a week in my office. I think the edginess of the odac is more tolerable now with headphones....
Just saw the news flash , exciting times ..dB
SOURCE: OPPO Digital, Inc.
April 02, 2014 19:00 ET
OPPO Introduces Planar Magnetic Headphones
PM-1 Delivers Audiophile Performance and Luxurious Comfort
Alex has said to me that there will most likely be another 1 or 2 LAu's available , there are extra parts for most of the build, he just didn't want to sell the promise of an amp without being able to deliver. But , this does not prevent you looking for other options, I just wanted to make it clear that there might be a few LAUs available.