Quote:
Originally Posted by
shigzeo 
Ive found that resistive impedance adapters work wonders for certain playes and dynamic earphones, but every balanced armature I've used and tested reacts funny to impedance adapters, losing treble detail or gaining too much in other areas.
For dynamic earphones, I could almost swear by a nice one, though.
Hi shigzeo!
For me, the resistance in the setup, when we use a balanced armature headphone, has a lot to do with the "image" of the sound. When implemented well, you win soundstage, separation and placement of instruments. In short, the sound becomes more natural and spacious.
Of course there is a relationship between signal strength, the resistance value and the total resistance of the headphone itself, which need to be well matched.
For example: I do not like the result of my Shure SE530 with P to S adapter from my Ety, using the Cowon J3. The result is a sound artificially "deep", as if you were listening to music in a cave...
Moreover, this Shure suffers, in my opinion, lack of resistance, because their "default" sound is too stoned or condensate, with little or almost no soundstage or spatiality. In this case, I believe it would work well with a resistance between 20 and 40 ohms, for example.
Already in the dynamic driver earphones, the higher the resistance, the more "slow" are these headphones and you're bound to have a power output increased to compensate for this "slowness" of the headphones. So, in this case, the resistance does not provide a change in the sound signature of the phone and yes, makes it more suitable for the use of a headphone amplifier.
Cheers,
Peter
Edited by cardozo - 11/4/10 at 2:22am