Quote:
Originally Posted by
albau 
Hmm, interesting... Why would Moto shut out armature phones. Just because most cheap buds and IEMs used by the general public are dynamic? In any case I guess your explanation makes sense since I was wondering why my Pana HJE-900 (which I totally stopped using after getting W4s 2 years ago) sound on Razr M more or less same as on IP4.
I'm not aware or Motto design choices but i know for sure that armature headphones are way more picky with output impedance than dynamic ones because the have a non linear impedance across the frequency ranges.
Hence high output impedances + armatures and you're all set for a sonic disaster.
High output impedances + dynamic and you get just uncontrolled bass because of a lack of electrical dampening.