Nead headphone cord for Technics KN650 keyboard

https://www.manualslib.com/manual/1138062/Technics-Sx-Kn1000.html
++

Get a
Universal 1/8" to 1/4" Headphone Adapter

Try searching on Google for JNTWorld.

Unusual to fail on both channels at the same time, however the most common cause is a break in the wire just above the 3.5mm plug.
I hope I have been of help but please do not hesitate to ask if you have any further questions.
I appreciate your vote if you appreciate my reply.

What type of headphone connector do you have? The Yamaha keyboard headphone jack is a 3.5 mm stereo jack (like on a computer headphone jack). So if the headphones have a 1/4" plug, you need a 1/4" to 3.5 mm adapter.

I hope this helps.

Cindy Wells

You can buy replacement plugs and solder them on. Make sure you take the old one to the store when you purchase the replacement. The next thing you need to do is figure out which wire goes to which part on the plug. You can us a volt ohm meter to test the old plug and see which color of wire or which color of wire insulation matches to which part of the plug. You can also try taking the foam pad off the left earpiece and look to see if you can get the speaker plate off the earpiece. Once off you can look to see which color goes wher. There will be another wire there that connects the right earpiece to the left one. Make sure you unscrew the shield from the plug and put it over the cord facing the correct direction before you solder the plug to the wiring. Screw it to the plug after. Hope this helps.

You can use any jack as a replacement. You won't affect the quality, unless you wire it incorrectly, or you buy a very cheap jack. Gold plated won't do much difference in regards to quality. It will not be noticeable, but will look pretty!

- TERMiNAL OPTiC
www.DJPROLAB.com

Yes, they are the same, except for the headphone cable and in some cases the color (although I've seen black 1200A):

RPDJ1200K (black) - have a non-coiled cord
RPDJ1200A (silver) - have a coiled cord that stretches

Sometimes you need to "burn in" your headphones. Used headphones usually produce a better sound than new ones. Simply let it play some music continuously. I usually burn in my headphones with some AM/FM static. After a while, the sound should improve. Good luck!