Originally Posted by holl_ands
I do NOT believe the Frequency Response Curves shown in InnerFidelity Measurements....fol. examples ALL show a severe [fictitious] LOSS above 10 kHz, likely due to the MEASUREMENT System....which is likely ALSO injecting the RINGING you see in the Square Wave Tests:
NOPE, you are INCORRECT, sir. ;] I'm no TYLLOPHILE, but his MEASUREMENTS have always been the MOST accurate for ME when playing back a FREQUENCY sweep.
Ok enough joking, so... I have the 400i, they have that small dip at 10-15khz and then good extension to 20khz and a ring due to the under damped backwave, but not ringing
The 1540s have pretty smooth extension to 20khz albiet rolled off and 5db below the midrange, no ringing.
The lcd2 basically measured flat to 20khz, no ringing
The aeons are extended and rolled off to 20khz similar to the 400i and shure
The he1000 are flat to 20khz with some ringing.
In any case all measurements, tylls included, should be used as a reference and not objective fact, with an understanding that over 5khz things get wonky on any test system.