Left headphone audio output is slow as compared to right ear phone

I have Macbook Pro and since last few days left headphone audio output has became very slow as compared to right headphone audio output. I have tried multiple headphones but no luck so its problem with audio jack I think.
Did anyone experience same problem? Kindly please guide.
Thanks in advacne.

This a new one for me, the is slower?
Trya pram reset:
Power off, power back on holding the following keys before the start up chime.
option, command, P,R (no commas) continue to hold these keys till you hear the start chime 2 times and release.
Reboot, see if this helps.

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