basshead
X-TRAIL HOLIC
Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: amp install - alternator whine/constant humm
While not totally dismissing Alan & Jalal's recommendation, if it was me, I'd be contacting the retailer that sold you the head unit - the fact you've isolated it to the head unit by trying another one (which worked fine), in my opinion, would indicate the head unit is faulty. You might have abit of an argument with the manager about it, but if you can go back to the shop with the spare head unit (still got the factory one at all?) and prove in front of the manager's eyes (ears) that it's his head unit that's causing the noise, then I am sure he has a legal obligation to replace it.
Just be aware as I already mentioned with my Alpine amp's, there's the possibility it's a trait of that particular model of head unit, so you might need to replace it with a different model or brand to keep the noise at bay.
--- Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.
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9/Jan/2010, 12:10 am
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BPR
X-TRAIL NEWBIE
Date Registered: 03-2009
TOTAL POSTS: 23
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Re: amp install - alternator whine/constant humm
hey guys,
thanks for the replys, and thanks for the thread jalal.
i have tryed running the same earth from the head unit to the amp, but made no difference.
i have also tryed most of the things listed in the thread jalal put up, attaching a noise filter on the rca's did nothing like i said before. i also tryed a noise filter like on the bottom picture of the thread but that did nothing at all either.
also i tryed attaching an earth on each negitive of the rca's, but still no difference.
i agree with you here rich, i belive there is something wrong with the rca;s outs on the headunit which is a bugger because i baught this headunit online, (i dont think i can say the website) but when called them, they said any problems is kenwoods fault, so i called kenwood and they said that i have to go through that online shop. (i think ill have a big arguement on my hands with them)
i am also thinking about just filling out an online return form from kenwood, and sending it away with my headunit to them with the recipt.
FJRKYM, do you mean having the same earthing point for both the amp and the headunit?
thanks guys for your feedback! i cant wait to get this all sorted!
thanks, brenton
--- Brenton - 2005 S2 STX Auto
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10/Jan/2010, 1:55 pm
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Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: amp install - alternator whine/constant humm
Hi Brenton,
Here is a link to MP3Car.com where the problem of ground loops is discussed with a methodical approach on how to find where the fault is.
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog
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12/Jan/2010, 10:28 pm
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NissanTaylor
X-TRAIL ENTHUSIAST
Date Registered: 06-2008
Location: Canberra, ACT
TOTAL POSTS: 244
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Re: amp install - alternator whine/constant humm
quote: MikeSpike: x-trail has no earth cable
i think you'll find they have many, also in this forum you will find a thread with a few people havent issues with dirty earths and sanding paint and rust back etc. also the bonnet acting as an antenna would only affect the audio system if in radio mode correct?
also ive heard that some head decks for example the JVC EXAD i believe had similar issues with poor sound clarity, something about running on DC voltage and have a prob with putting out a small amount of AC voltage and cooking any speaker/amp its connected too.
i would check and clean the coupled earths in the engine bay (timing case and intake manifold from memory). just for the info i ran my power wire down the passenger side of the car with all the other wiring to the back, ran RCA's (and remote wire) down the dash and centre console, under the carpet under the drivers seat and then follows the rest of the wiring under kick panels to the back, earth is about 2ft long and is mounted in near the spare wheel well on a clean earth.
i have a voltage regulator and earthing kit (earthed to battery, throttlebody, timing case and ECU bracket) that was there before the big system went in so dont know if that could help u or not
---
X-897
My Old Platium 07 STS Xtreme - Click Here to check out my mods and pics
Now own a Black C34 Nissan Stagea RS4-S
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23/Jan/2010, 11:08 pm
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