First, I have been involved with the loud side of hi-fi for a long time....well over 30 years. My last headphones were Koss Pro4aa of the original issue.
I continue to own a pretty good system which remains static for years at a time since I simply can't afford new stuff all the time. I am using my 2nd pair of speakers, about 3 years old, after I sold my original panels of over 25 years were sold.
Anyway, many people are concerned with sensitivity, impedance, SPL and overall frequency response.
I haven't seen any mention of phase angle. Is this an issue with phones? A large phase angle will suck the power out of an amp. With stereo speakers, a difficult load is one with both a low impedance dip and a high phase angle at near-same frequencies.
Is there any similar data for headphones? Does anyone measure phase angle? Are dummy loads for amplifiers pure resistive loading or do they have reactive elements?
I continue to own a pretty good system which remains static for years at a time since I simply can't afford new stuff all the time. I am using my 2nd pair of speakers, about 3 years old, after I sold my original panels of over 25 years were sold.
Anyway, many people are concerned with sensitivity, impedance, SPL and overall frequency response.
I haven't seen any mention of phase angle. Is this an issue with phones? A large phase angle will suck the power out of an amp. With stereo speakers, a difficult load is one with both a low impedance dip and a high phase angle at near-same frequencies.
Is there any similar data for headphones? Does anyone measure phase angle? Are dummy loads for amplifiers pure resistive loading or do they have reactive elements?
