There may even be more solutions, but my fingers are getting tired. Aux input electronic noise problem solved My thanks to the other folks in this forum that pointed the way to solving the (OEM stereo) aux input. Getting a 4-conductor jack, and wiring up just the Tip, First Ring, and Sleeve - while leaving the second ring totally unconnected - may do the trick in this case. Except the Mic hot (which may have a mic-powering voltage on it) is (safely) shorted to ground on your 3-conductor sleeve. Your phone may have an integrated mic input, and your headphone out may actually be a 4-conductor jack, that's "compatible" with 3-conductor plugs. The filter includes a female 3.5mm input, a male 3. Since there's already a ground somewhere else, your audio will still work, and has a good chance of being quiet. PACs SNI-1/3.5 preamp noise filter plugs in between your receivers auxiliary input and your portable music player and helps reduce noise caused by ground loops. if you don't mind breaking into a cable (or making one) connect + and - per usual at one end, and + only at the other. Go "local RF" for your audio link, although I've never been happy with that sound. However, if you listen to headphones on your phone, and you hear hum, then there's a power supply issue you'll need to address. The ground for charging current and shielding will still be made from the charger connection and from the head unit up to the 3.5mm receptacle. There's no metal-to-metal contact in the deck, so you'll be ground isolated and good to go. You should be able to eliminate the problem by lifting the shield at the 3.5mm stereo mini plug. Current 8.55 Amazon (New) High 13.63 Amazon (New) Low. PAC SNI-1/3.5 3.5-mm Ground Loop Noise Isolator Works with iPod/Zune/i. Or, if you have a cassette deck, get a cassette audio injector to feed audio that way. View community ranking In the Top 1 of largest communities on Reddit. Or, buy a commercial alternative, and connectorize it to suit. The filter includes a female 3.5mm input, a male 3.5mm output, and 10 inches of cable for each jack. Keep your color codes consistent so that you don't have a polarity reversal and your head explodes. Solution: PAC's SNI-1/3.5 preamp noise filter plugs in between your receiver's auxiliary input and your portable music player to help reduce noise caused by a ground loop. Wire the headphone side to the primary and the car stereo side to the secondary, x2 for stereo. Go to the Shack and get a pair of those little 600 ohm transformers. Whether that's an issue depends on your phone/battery. Doing that would actually create a ground loop, if the phone is being powered.Ī few choices are: Run on phone battery only when you're listening.
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