sup /mu/ /g/tard here with a request i intentionally bought

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sup /mu/

/g/tard here with a request

i intentionally bought a motherboard with a better-than-average onboard audio options because i like to listen to music
not an audiophile, but enjoy quality tunes

for the first few months i had zero problems using my headphones (m40x's) the read green 3.5mm jack as per usual

at some point i decided to hook up my older 2.1 stereo setup, which was originally a logitech set but i broke one speaker, decided to scrap both and splice in some nicer JBLs

they work fine, i've tested them with 2 different phones

however, shortly after having plugged in the 2.1 set, i've noticed that the green jack makes whatever is plugged in (speakers, headphones) pop in the left speaker whilst no audio is playing

this is unbearable while i have my headphones on, and it pops while i'm sleeping with the speakers plugged in. need it to stop

i've troubledshooted the problem for over a month now, can't seem to find the exact way to google it. a lot of people claim it to be a speaker problem but both sets work just fine using the front audio jack and my phones.

i've completely reinstalled windows, updated all drivers twice, no cigar

one person suggested cleaning the interior of the jack using the DEOXIT chemical
i've worked at a music store before, and i know the stuff is good, but what does /mu/ think?
any other suggestions?

tl,dr:
-read i/o jack pops in left speaker
-headphones and speakers confirmed working fine elsewise
-drivers&windows up to date
-wat do
-pic unrelated