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[MObe]

  Here is a question for all you electronics gurus out there.  
  I have a set of shure E3C earphones that I really like. I use them on one of my other bikes and I want to use them on the SEEG, but I want to still be able to use the handlebar controls for volume and such, so I don't want to plug directly into the XM receiver.
What I want to do is to put a 1/8 mini headphone jack on my "05 SEEG.
I know that I MUST NOT attach the jack to a metal bracket because it will short the speaker ground to chassis ground. I have fashioned an ABS plastic bracket for this.
  I added a switch to the "hots" on both speakers using a DPST mini switch.
I noticed that right and left channels to the speakers each have their own seperately color coded ground wires.
  My problem is that all of the headphones and headphone jacks that I have seen have a common ground wire.
  Playing around with the system last night I noticed that the ground off of either speaker makes both channels work.
  I'm afraid to hook both grounds together for fear of damaging something.
How should I wire this up?
  

[MObe]

I believe what I need is a "floating ground adapter".  I found one here,   http://www.hifisoundconnection.com/Shop/Control/Product/fp/SFV/30046/vpid/2681110/vpcsid/0/rid/118099  that will handle up to 30w per channel.
  I think this will work OK unless I crank it all the way up, (not likely with earphones).
Is this right?

[hogasm]

MObe, Hope you make this work for you. I have been trying, at different times, for the last year to make this work with no such luck. When you succeed post some pics.

[hd-dude]

Mobe;
I would not use the floating ground adapter.

Try this:

Use the right+ and left+ from the radio to the headphone jack. For the ground connect directly to the radio chassis. The volume may be too loud through the headphones so you may need to use a resistor in series with each + leg. The value of the resistor would be between 150 - 475 ohm. Use at least a 1/2 watt resistor.


Let me know how this works. If you experience noise then you could use a ground loop isolator in series as well.

[MObe]

Thanks hd-dude
I'll give this a try in the next day or two and post the results here

[MObe]

I tried connecting the headphone ground directly to the radio chassis this evening and it didn't work well at all. It was very faint and tinny.
I tried connecting both of the speaker grounds to the headphone common, and this worked very well for the headphones. It was just a bit more clear than when I had the common ground connected to only the left speaker ground. A very slight difference.
Unfortunately when I switched the main speakers on they were not at all happy with this set up and when they were turned up they tended to clip and cut out.
So at this point the best compromise seems to be to use only the left speaker ground to the headphone common ground. The sound is quite good with this set up. I may still need to add a ground loop isolator to the headphone common and I'm still curious as to how it might work with a floating ground adapter installed.
It takes a very small amount of total available volume to make the headphones very loud.  Three dashes worth of volume is LOUD.
I'll play around with a few more ideas and post the results here.

[hd-dude]

Most Headphones only need a very small amount of power to play. That is why you'll need to play around with a resistor in series with the (+) legs, Try a 220 ohm first and see how that does. Then you can go up or down from there. Connecting the grounds together will damage the radio since it is a floating ground amplifier.

Another idea that just came to mind is to use the factory (non-CVO) speaker wires to your headphones. They are not amplified. These wires are typically tapped back on the harness near the speakers. Color code to look for are:

Left + White / Orange
Left - Light Green / White
Right + Gray / Red
Right - Light Green / Black

Just for Info the color codes for the Amplified outputs are:
WHT/PNK
PNK
WHT/GRY
GRY

[Jock]

I would be very interested in the results...

[MObe]

Thanks for the info hd-dude;
Using the non amped wires may be just the ticket. I'll play around with this over the weekend and post the results.

[SixGun]

This is what I use, why won't work for you too?  I plug the XM on my old machine into the AUX and everything works fine!

http://electricalconnection.com/audio/headset-adaptor.htm

[hd-dude]

This is what I use, why won't work for you too?  I plug the XM on my old machine into the AUX and everything works fine!

http://electricalconnection.com/audio/headset-adaptor.htm

That looks like it will work on the Ultra's as the have the headset jack on the tank console. The SEEG does not.

[SixGun]

You're right...I forgot about that.

[SixGun]

I wouldn't spend the money it would take to wire it up, I'd just get a 2007 SE Ultra!...Just kidding.

[MObe]

Update on headphone jack wiring:
1) I used a shielded headphone extension cable from radio shack.
2) Used a floating ground adapter (the radio is floating ground, headphones are common ground)
3) Used the LOW POWER leads off of the radio
4) Used 1K resistors on the + leads (to keep the volume adjusments reasonable)
5) Added a switch to the main fairing speakers
6) Took the Hogtunes speakers out and put the stock speakers back in, (hogtunes weigh 2x as much stock and keep breaking the right fairing support bracket)

[MObe]

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