
AKG 240M.
Unmatched drivers impacts soundstage (mono frequency sweep reveals left/right shift from upper mid-range and up) with one audio dropout below where you'd normally hear a cymbol crash, and another notch just above that.
After purchasing Beyerdynamic 990 Pro's, I gave away the AKG's (Good riddance!)
Sounds like you had a defective driver. 

































should be better - but WON'T touch a proper dedicated amp

