Years ago someone wired up these headphones to a 1/4 inch plug and they they say they don't know what polarity meant. There's no point following their clueless wiring.
Out of phase headphone transducers create a far more subtle adverse effect than that noticed in loudspeakers, so it is not something immediately evident by A-B testing. Nor is testing necessary if someone here knows what the color coding is.
You must know the headphones well because I had long forgotten the leads plugged into the earpieces. I didn't realize the mini plugs were keyed to go in only one way around. With that info I could have continuity tested the colored leads to each of the larger pins on the plugs but you saved me doing that becauase you have given me the color coding too. Thank you.
You're right about the muffs crumbling. I threw them out. First I'll see what the cans sound like now and then decide if it's worth getting new muffs.
It's been instructive to see how many people misunderstood what the original question was trying to solve and they gave obviously useless, if not misleading, advice. It's never been the same since Eternal September.
Actually that's untrue, nobody misunderstood the question or gave useless or misleading advice. And Phil is quite right, the effect of having the headphones out of phase with each other is not at all subtle, it is at least as obvious as it would be with speakers. Just because there is no phase cancellation in the air doesn't mean that the brain is not immediately aware of the phase difference heard in the two ears.
Did anyone ever come up with muffs better than the OEM crap for these? I have two or three bald pair at the back of the cabinet. I ordered new muffs for one of these, once, at some amazing fraction of the cost of a new set of headphones. (Hearing I had bought new muffs, a friend pressed his on me. Frustrated, he had bought Koss headphones.)
Wire them up to a mono source and insert a dpdt switch so you can easily and quickly reverse the phase of one earpiece. Insert a PVC T coupling between the earpieces. Compare the sound levels coming from the bottom of the T while flipping the switch. Loudest is in phase. Art
** I have come across folk with their hi-fi speakers wired out of phase and gone un-noticed for months or years. Room acoustics and listening position being critical to observing the fact. However, stereo headphones wired out of phase is just the weirdest sound and not tolerated by many for long.
Headphone listening is nothing like listening to stereo speakers or natural sounds in the environment - the outer ears are no longer involved and moving one's head has no effect on the sound heard. The stereo effect becomes extreme and the "sound stage" appears to be inside one's head extending left and right as well. Plus the who damn thing moves about with your head movements.
My first guess would be blue+ red- and black+ yellow-, but here's how to find out. First hook them up, arbitrarily starting with what I said, or the other way - it's a coin toss. Listen to something in mono. You'll have to find your own mono source. (finding a mono source is left as an exercise for the student.)
If the resulting sound comes from the middle of your head, you got it right. If it sounds like two sources on either side of your head, you've got the polarity wrong on one side or the other.
I'm getting this from remembering (I think) that in the old 4-wire phone lines, green was tip and red was ring, and black was tip and yellow was ring. ---