Koss KSC75 whistling/ fluttering problem??

I have had the KSC75 for a long time. I haven't experienced what you are experiencing. Which player are you using? Is the equilizer set on neutral? How high do you set the volume? Do you hear this same abberation when you plug the KSC75 into your pc and play the songs from there?

Quote:

Originally Posted by joshloft 

iPhone 4 and a Fiio E7 and or a Fiio E7 with iTunes on my Macbook Pro. I think when you have the volume a little over 50% it starts to do it. Yes I do hear the same abbreviation. I listen to music at volumes that are probably unacceptable for most humans. So maybe they weren't designed to go to 100% volume without a little distortion. 

Listening to loud music will permanently damage your hearing. You shouldn't listen to music at over 80 db. An average conversation is around 60 db. A telephone dial tone is around 80 db. I keep the volume low when listening to music.

Quote:

Originally Posted by JK1 

Listening to loud music will permanently damage your hearing. You shouldn't listen to music at over 80 db. An average conversation is around 60 db. A telephone dial tone is around 80 db. I keep the volume low when listening to music.

 

IMO the minimum volume settings on many players are way too high to use with IEMs.

I'd hear a rattling type noise when deep bass hit, the Koss KSC75 doesn't handle deep bass very well.

Quote:

Originally Posted by joshloft 

Your saying the minimum on players are to high?  How loud should players be for IEMs be? Here I will ask you this. What is the maximum volume percentage that the Koss Ksc75's should be put at? 

I've only briefly listened to the KSC75s on a Rockboxed iPod, but I acknowledge that as supraaural headphones they lack isolation and thus the volume did need to be turned up at bit, but not past halfway. The default iPod firmware however has a much louder minimum volume, so I believe a bit over a quarter should be enough. If you try to steadily decrease your volume in timed decrements as opposed to turning it all the way down when you listen to your music you may find it easier to adjust to lower volumes.

If you find it difficult to listen to lower volumes there's two possible causes a) you've already lost your hearing to that degree or b) your headphones lack clarity at lower volumes, which is more likely. In the case of the latter, it's time for you to buy some better headphones before you do any more damage to your ears.

Usually IEMs require a relatively low volume output to sound loud because they isolate well. This is completing disregarding impedance and sensitivity, of course.

Quote:

Originally Posted by joshloft 

I love head-fiers they are so smart. But, I do listen to them at school which is kind of loud maybe I should just take my M50s to school more for the isolation. Not quite as portable though. Since were on the subject. What percentage on my Fiio E7 should I have my M50s? By the way, they don't go from 1-100 they go to 1-60 through the E7.

IMHO you're better off with the M50s in a louder environment due to their isolating properties. As for volume on the E7, that I cannot answer as I do not own any portable amp. 

As JK1 pointed out, you shouldn't be listening to music over 80 dB. The best you can do is find a general mapping of dB to volume level on the E7. However there's really no way for you to measure the dB of the actual sound output through the player since the sensitivity and impedance of the headphones, not to mention their ability to isolate, affects that too. 

I think the comparison to the telephone dial tone is helpful. If the music coming out of your headphone sounds louder than the telephone dial tone then it is too loud. I read the telephone dial tone is at around 80 db.

I think you should get an IEM for use at school when you want isolation but don't want to carry a bulky closed headphone. There are some decent enough IEMs under $25 that isolate decently.

Quote:

Originally Posted by JK1 

I think the comparison to the telephone dial tone is helpful. If the music coming out of your headphone sounds louder than the telephone dial tone then it is too loud. I read the telephone dial tone is at around 80 db.

 

I think you should get an IEM for use at school when you want isolation but don't want to carry a bulky closed headphone. There are some decent enough IEMs under $25 that isolate decently.

The volume of the dial tone can be adjusted in newer phones, so I wouldn't find that to be very reliable in measuring loudness.