(2) tie up the speakers in the back panel and headphones in the front panel together (1) disable front panel retasking (headphone jack is a headphone jack and cannot retask into a mic jack for example) Since Realtek is a fabless chipset maker, OEM's can customize anything they want for a few cents less.Īll the Realtek chipsets have jack presence sensing capabilities, but SOME chipsets do NOT have impedance sensing capabilities.