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Old January 16th, 2006, 10:37 AM   #1
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Help with Alternator Whine - Sirius S50 Install

Hello everyone. I did a search through all the threads related to aux input installs and I can't find the solutions to my problems. Can someone help me? I have a 2003 Accord Coupe (love the car BTW) and installed a Sirius S50 over the weekend.

I used the PIE adapter to convert the CD changer port to an aux input:
http://shop.store.yahoo.com/csexpo/hopiediprco12.html

I used a ground loop isolator to try an take out electrical interference:
http://www.radioshack.com/product/in...ductId=2062214

The cable and RCA male to female adapter
http://www.radioshack.com/product/in...ductId=2102974
http://www.radioshack.com/product/in...ductId=2102665

The connection is head unit --> PIE --> GLI --> Sirius S50.

The S50 is connected with the line out on the back of the car kit and gets its power from the cigarette lighter in the center armrest.

My problems:
1. The volume is low compared to CD and radio. Can I boost the signal?
2. I still get a whine when accelerating. Can I do something else to remove it?

Thanks for your help.
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Old January 16th, 2006, 05:31 PM   #2
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Oh boy, I love this problem. I had it too.

1. Sounds silly, but buy a monster gold plated connector for the rca=3.5 conversion (every little bit helps)
2. I'm sure you have, but if not, tweak the S50's settings, or turn the volume all the way up there.
3. Sounds stupid, but try twisting the input, mine varies rediculously by just twisting it. I can't explain how but it worked for me.

I know the frustration, especially when the GLI doesnt help much

oh and also, i don't recommend a signal booster, they just amplify the whine sometimes.
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Old January 17th, 2006, 07:34 AM   #3
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Thanks for the advice. My troubleshooting continues.

I finally read through the manual for the S50 and figured out how to turn up the volume on the player. It is louder, but still not as loud as the other inputs. I can live with it, however, since I also heard that line drivers may add noise.

I tried connecting an ipod (no power hook up) and it sounds perfect. The issue seems to be the power wire. Has anyone used a noise suppressor on the power line?
http://store.yahoo.com/yhst-15539224239217/nf125.html
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Old January 17th, 2006, 04:50 PM   #4
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They're just pieces of crap.
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Old January 17th, 2006, 06:40 PM   #5
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i have a simmilar problem with my ipod when i plug in my charger...mostly i just leave it unplugged unless the battery is completely dead
i was under the impression that a ground loop isolator would fix this but it sounds like its not helping you any.
is your isolator connected right....check your ground points
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Old January 18th, 2006, 02:07 PM   #6
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Ground points? What do you mean? The GLI does not have a ground wire, just RCA's out of each end that connect the PIE to the Sirius S50. Should it be mounted to something?
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Old January 18th, 2006, 04:51 PM   #7
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He means the ground for the power. Did you DIY or take it to Best Buy or somethin?
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Old January 19th, 2006, 10:59 AM   #8
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I did it myself. The power plugs into the power port in the center armrest and connects to the unit. There is not a ground wire.
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Old January 19th, 2006, 04:17 PM   #9
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I may be noob here, someone verify this info. But I believe w/ those lighter adapters, one of the wires is hot, and one is ground. You have to split it and hard wire it in. Thats only what I think, not a fact.... So double check that one.
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Old January 19th, 2006, 07:47 PM   #10
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GLI is just an isolation transformer that levels the ground of the stereo to the floating source input ground. As AirKilroy stated, there is no additional "ground wire".

Since alternator whine is usually a grounding problem, try adding a direct chassis ground to the power outlet's ground (splice another wire to the power outlet's ground wire and ground it straight to the chassis). This may help because the power outlet's ground wire takes a round about route to a chassis ground.

Another option is an active power filter (available at RatShack). You can either splice the filter into a power source and hard wire it to your Sirius, or cut the the feed to your power outlet, add the filter in-line and connect the output of the filter to the power outlet. Again, this may not work for your particular install, but it could be worth a try.
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Old February 1st, 2006, 09:47 AM   #11
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Thanks for the tips. I added a noise filter to the power line going to the power socket and all whine disappeared.

http://www.audiooutfitter.com/store/S10ACL.html

I understand that this is probably masking a bigger issue ie. an audio input shouldn't get it's power from a cigarette lighter, but I'm happy.
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