connecting gps, radar audio to headphones
Printed From: the12volt.com
Forum Name: Motorcycle Electronics
Forum Discription: Installing Stereos, Alarms, Remote Starters, Lights, Garage Door Openers and other electronics on motorcycles.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=101803
Printed Date: May 10, 2024 at 3:04 AM
Topic: connecting gps, radar audio to headphones
Posted By: bqe.
Subject: connecting gps, radar audio to headphones
Date Posted: February 02, 2008 at 1:44 PM
Im using a Y spit male mono to female stereo 3.5mm cable and attaching my headphones figuring that each device would be on a seperate seperate channel. Im getting stereo from both units when there connected, is it possible to diode isolate to solve the feedback?
Replies:
Posted By: audioman2007
Date Posted: February 02, 2008 at 2:00 PM
So you are having both units Y into 1 output which is your headphones? That wont work. As long as both are powered up, you will be getting both audio at the same time. And diodes will only prevent the audio from 1 unit from feeding back into the other unit and vice versa.
Posted By: bqe.
Date Posted: February 02, 2008 at 2:02 PM
Right, both units into y and then into headphones. Is there anyway to make it work without the feedback?
Posted By: audioman2007
Date Posted: February 02, 2008 at 2:50 PM
Its the exact same thing as having a ps3 and xbox 360's A/V cables Y'd into a single A?V input on your tv and powering them both up at the same time. Well it wont work with the video cables both attached so if you unplug those and let just the audio ones connected, when both units are powered on, youll hear both unit's sounds. Dealing with your question, I do think you can do it one way. Ill draw up a diagram for you.
Posted By: bqe.
Date Posted: February 02, 2008 at 3:07 PM
The cable I'm using is two seperate MONO male 3.5mm Y'd into the female 3.5mm stereo audio jack...so there is a left and a right input to the stereo plug. I would have thought that diode isolating each mono input would have solved the feedback issue.
Posted By: audioman2007
Date Posted: February 02, 2008 at 3:11 PM
Both of your units have a sterio jack. What youll need to do is get 2 sterio cords. One to plug into each unit. The other end youll cut. There will be 2 wires in each. You will splice those 2 together. On your headphones, there will be a jack. Cut it off. There will be 2 wires. Wire one wire to the one unit, wire the other wire to the other units wire. You can also use mono type cords then you wont need to splice those wires together. Hope this helps: 
Posted By: bqe.
Date Posted: February 02, 2008 at 3:12 PM
Posted By: audioman2007
Date Posted: February 02, 2008 at 3:14 PM
Wait. Where are the rca's plugging into?
Posted By: bqe.
Date Posted: February 02, 2008 at 3:17 PM
The gps is a stereo unit..the radar is mono. When both units are connected there is feedback through the other unit causing the each mono input to be heard on both lft and rght channels in the headset.
Posted By: audioman2007
Date Posted: February 02, 2008 at 3:19 PM
these headphones you are talking about, are they made for the car? Like are they wireless and have a reciever that has RCA jacks?
Posted By: bqe.
Date Posted: February 02, 2008 at 3:21 PM
That was the only cable available..so I also purchased adapters. https://www.cablestogo.com/product.asp?cat%5fid=102&sku=03195
Posted By: bqe.
Date Posted: February 02, 2008 at 3:24 PM
Im using isolator earphones that for use on my motobike.
Posted By: audioman2007
Date Posted: February 02, 2008 at 3:25 PM
Ok we are getting alittle ahead of ourselves. These headphones you are using... are they a kind that can plug into a portable cd player or is it the kind that is made for cars has a reciever that has rca jacks?
Posted By: bqe.
Date Posted: February 02, 2008 at 3:28 PM
there are just regular earphones with a 3.5mm jstereo jack that you would use on a cd player.
Posted By: audioman2007
Date Posted: February 02, 2008 at 3:44 PM
ok and the gps and radar detector have what kind of jack?
Posted By: bqe.
Date Posted: February 02, 2008 at 3:56 PM
The gps has a stereo 3.5mm jack and the radar a mono 3.5mm jack.
Posted By: audioman2007
Date Posted: February 02, 2008 at 4:04 PM
Oh ok this wont be hard at all. youll need one 8 foot mono cord which will plug into the mono jack for the radar. Youll cut the jack off the other end. There will be 1 wire inside. You will need one 8 foot stereo cord that will plug into the gps. You will cut the jack off the other end. There will be 2 wires. You will splice those wires together. You will need another stereo cord (length youll need to determine). You will cut off 1 jack. Leave the other one alone. The cut end will have 2 wires. Splice one into the mono cord that you had cut earlier. Splice the other wire into the stereo cord you had cut earlier. On the other end youll need a 3.5" 2 female connecter. Youll plug the one female end into the headphones and the other into the "length youll need to determine" cord. Now your gps will come out one headphone, and the radar will come out the other side. Understand?
Posted By: bqe.
Date Posted: February 02, 2008 at 4:11 PM
Arent you describing exactly the setup I have now?
Posted By: audioman2007
Date Posted: February 02, 2008 at 4:24 PM
No because your one unit gives out only to a right speaker, your other gives out to both right and left. So when you get to the Y adapter, it mixes the right's from both units together. Thats why they blend together. The setup I gave you takes stereo unit and makes it a mono but the difference is that I keep both units seperate. Its the same thing if you had 2 mono units and used a Y adapter. You would have blended audio coming out of 1 head phone speaker. understand? If you want me to draw it up to explane it more, I can.
Posted By: bqe.
Date Posted: February 02, 2008 at 4:33 PM
I just dont understand if there is a stereo output and you connect a single channel mono..you would effectively be eliminating one of the channels.
Posted By: audioman2007
Date Posted: February 02, 2008 at 4:41 PM
You are correct. But if you take a stereo's 2 wires and splice them together, you just combined those to a mono. if you listen closely to your tv, youll take notice the the right speaker and left speaker dont always have the same "sounds" all the time. When you listen to a music cd, some intro's to a song might only use the right speaker and then all of a sudden the left speaker joins in. If you were to disconnect 1 speaker, then youll lose what that speaker put out. In your case, if you combine the left and right, youll have both of those, but just in a mono state. You need to do this because you are going from 3 outputs (2 right/left from one and 1 right from another) but you are running those to 2 inputs (your left and right headphone speaker).So you will have 2 rights and 1 left. You need to "remove" the one right by simply joining it with a left to remove any chance of blending together. I will show you some diagrams.
Posted By: audioman2007
Date Posted: February 02, 2008 at 4:54 PM
If you were to just take 3.5" Y adapters and get the stereo cords this is how it would look: 
Posted By: audioman2007
Date Posted: February 02, 2008 at 4:57 PM
This is how it would work if you spliced: 
Posted By: bqe.
Date Posted: February 02, 2008 at 5:11 PM
Posted By: bqe.
Date Posted: February 02, 2008 at 5:15 PM
The Y...is two monos on top into one female stereo just like the last pic I posted. It only takes a single left channel and a single right channel into the stereo female jack that I plugmy headphones into.
Posted By: audioman2007
Date Posted: February 02, 2008 at 5:26 PM
You said your GPS has a stereo jack and the radar has a mono. That is what I drew above.
Posted By: bqe.
Date Posted: February 02, 2008 at 5:32 PM
yes the gps has a stereo output but im plugging in a mono cable...did you see the cable with adapters that im using? Im getting feedback through, I think the common at the stereo jack at the Y cable im using...so my original question is will diode isolating it solve the problem?
Posted By: audioman2007
Date Posted: February 02, 2008 at 5:39 PM
Well thats why you are getting feedback. You are taking a mono cable from each unit. All mono cables use either the right or left channel. So you are getting the same channel from both units. You need to seperate them. You need a mono for the radar and a stereo for the gps. You then splice the stereo together, wire that to a stereo wire that you have plugged to your headphones. Youll cut the jack opposite the one connected to your head phones. Youll then expose the 2 wires. The one wire will go to the gps the other will go to the radar.
Posted By: bqe.
Date Posted: February 02, 2008 at 6:47 PM
With all due respect, I dont think you know what your talking about or your simply not understanding my explanation of the question at hand. The manufactured Y cable has a left and a right channel it doesnt make a difference that there is a stereo out on one unit cause Im only using a mono out in it. Do you Understand? I didnt make any custom cable.
Posted By: bqe.
Date Posted: February 02, 2008 at 6:51 PM
Posted By: audioman2007
Date Posted: February 02, 2008 at 8:40 PM
Ok I dont know what I am talking about. Thenm explane to me why you are using that cable when there are no RCA's in either one of your units nor your headphones?
Posted By: bqe.
Date Posted: February 02, 2008 at 8:49 PM
As I posted earlier...that was the only cable available and I purchased two mono adapter 3.5mm plugs to fit the RCA's.. Your not reading or your comprehension skills are limited, or more probably your ego is more concerned about posting some half ass response and thus wasting everyones time in the process.
Posted By: audioman2007
Date Posted: February 02, 2008 at 9:01 PM
Half ass response? Im not on here to argue with you. You came on here for some help and I am trying to help you. And obviously I am the only one thats been trying to help you. If you dont want my help, then simply tell me and I will gladly move on. I do have other ideas on how you can do this one so dont get nasty with me if something doesnt look up to par for you. What do you think of this diagram? With this diagram, you will be able to use the one you pictured, but youll also need more cables and connectors. But this one will work: 
Posted By: bqe.
Date Posted: February 02, 2008 at 9:19 PM
Look, Im not interested in arguing with you...we are back at square one. Again, the last diagram you've drawn is exactly what I have now. A stereo 3.5mm jack cable does not have two wires. A mono 3.5mm jack cable does not have one wire. Will diode isolating each mono channel solve my issue with feedback?
Posted By: audioman2007
Date Posted: February 02, 2008 at 9:29 PM
a stereo 3.5 cord does have 2 wires. Though when you look at it on the outside, its 1 cord, but cut it open its 2 wires. One right one left. A mono 3.5 cord does have 1 wire. Its mono meaning 1. As far as I know, you should not have any feedback. If the setup you have now is the same as my last diagram, you are never crossing the right and left channels therefore you shouldnt be having any feedback UNLESS one of the cords is defective and the sound is jumping from right to left. A diode would only prevent feedback from going from one unit to the other. It wont prevent them from bleeding together into my headphone speaker. Another thing you could try is simply dont get any stereo cords between the gps and the rca y connector. If your gps is set up to put out the exact same "sound" for both the right and left, then if you use a mono 3.5 plug instead of stereo, it would be the same thing. Give that a try. If you are still having the same problem, then I dont have any other ideas. Sorry.
Posted By: bqe.
Date Posted: February 02, 2008 at 9:42 PM
Audioman...there are two wires in a mono cable, one positive and one negative..if there was only one there would be no sound..OK? That's why I assumed you dont know what your talking about..you cant even comprehend the very basic prinicpal of how sound is generated through the use of electricity.
Posted By: bqe.
Date Posted: February 29, 2008 at 9:42 AM
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