whining speaker

[allSHO94]

got a question for everybody and anybody. ever since i had the alpine head unit installed the interior door speaker ( driver side only) has been makeing this whining noise that's consistint with engine rpm's. at first i though no big deal but lately it's been ****** me off. so far all i did was put new infinity door speakers and rear speakers in place of the stock jbl's. that didn't work i still got that damn whining noise in the driver side speaker. and it's only that speaker. any help is appreciated.

 

[snowwind1990]

I can't help you, but I'm curious too. Snowwind has done with this with OEM for years....Like yours, it is not all the time, but the whirring sound is like with the engine as you say....accelerate and it gets louder....
I'm gonna watch this and see what they say.........
Or maybe it is just like I like to think it is, Snowwind humming along with the beat..Your baby might have a musical side to her nature too!
Ma Ma M

 

[SHOZ123]

Ground loop. You need a choke coil in the speaker gound wire.

 

[snowwind1990]

I need a choke hold of the speaker loop to the ground....say again??????/ eek! eek! eek!
Now ZZZZZ that ain't happenin'''

 

[SHOZ123]

Whining in a cars radio/stereo is caused by a ground loop. The noise usually comes from the alternator and will change pitch whith engine speed. If it is coming from all the speakers the problem is with the radio power wire. If you are getting a whine from just one speaker for some reason there is a ground loop problem. Probably a bad or corroded connection.

The usual cure is a choke coil. Available at Radio Shack it is 1:1 (12v in/12v out) isolation transformer where the signal/current is passed on without any direct electrical connection. Under $5.00 usually and easy to install. It is called a choke coil because it chokes off the offending Electrical Frequency Interferance.

<small>[ October 29, 2002, 09:39 AM: Message edited by: SHOZ123 ]</small>

 

[PROPHET]

I got that whine since the MSD ignition.

 

[SHOZ123]

Now tht I think about it if the whine is just one speaker that has to be coming from a power wire running parallel to the speaker wire or a fault in the amp on that channel.

The whine from the MSD should be fixed by putting a choke coil on the amplifier power wire as close as is possible to the amp. You may need more than one as the preamp (head unit) may need one too.

 

[James Downing]

Bringing this back from the dead...

I recently installed an Alpine headunit too, and the whirring is there, only in the left front speaker... has anyone been able to fix this problem?

I have a 12 month warrenty on the sucker, would that cover this? shrug

Thanks beer

 

[James Downing]

Bump. Anyone?? shrug

 

[torinogt]

Try the Ground loop isolater they sell them at any store. If not swap your head unit with another one and see if it solves the problem. Wierd that only one front is buzzing. I had the constant buzz and solved it with an isolator. Thats about all you can do.

 

[30footSHO]

Never had this problem with my Alpine HU. Could moving the ground location help this problem at all? Are all of you running off the deck alone, or the factory amps?

 

[James Downing]

Im still through the factory amps.

 

[rangerj]

ALLSHO94,

Get married and have a couple of kids and that speaker will sound sweet. wink rangerj

 

[Tunez]

James, did they use the factory wiring? Have you installed any MSD or anything of the sort? Like Paul mentioned above, alot of times if the wiring to the speakers is aftermarket a speaker wire may be too close to ignition related wire hence the engine speed whining. Also, just the simple grounding of the radio can make a big difference. If it is still grounded to the factory location, try moving it to a solid place on the frame under the dash. Make sure that it is a good bare surface for best results. If it is painted, scrape it, if not you're good. One of the best places are the nice clean SHARP metal parts that the under dash panels attach to. You may have to add a bit of wire and a ring terminal but it's a small price to pay to **** that annoying whine.

 

[yamahaSHO]

James Downing:
Im still through the factory amps.

There is your problem... your HU is fine.. your Ford/JBL amps are crap. You should have used the HU's internal amp as it is most likely more powerful and cleaner.

<small>[ January 29, 2004, 12:58 AM: Message edited by: yamahaSHO ]</small>

 

[torinogt]

They sell factory amp bypass kits. I used one for my car.

 

[yamahaSHO]

torinogt:
They sell factory amp bypass kits. I used one for my car.

I've got one I don't need...

 

[DJ SHO]

yamahaSHO:
your Ford/JBL amps are crap. You should have used the HU's internal amp as it is most likely more powerful and cleaner.

I doubt that. The JBL amps are cleaner sounding (and sound decent too as the speakers are matched to the amplifier well), and have a "real" 20 watts per channel, unlike head units. It's physically inpossible to fit a great amplifier that can actually push some current to the speakers, in something the size of a head unit. There's not enough room. MOSFET sucks. unregulated power supplies make better sounding amplifiers IMHO. You might be able to get it "louder" from a nice Alpine unit, or whatever the case may be, but it sure isn't going to be clean at that volume. The auto-loudness and compression circuitry in the factory head unit is what kills the volume in such a nicely designed system (amps and main speakers - sub location and limited input signal to it could have been better IMO). I'll probably get flack for saying all this, but it's my opinion.

Back on topic, I say try the ground loop isolator. It will most likely cure the whining problem.

 

[Tunez]

No flack but there are many H/U's out there now that put out an honest to goodness 20-30 watts per channel and very clean at that. The main reason that many are able to do it cleaner than others are because of the built in crossovers in the decks. It takes far less size in an amp to drive 20 watss at a higher frequency than it does at a lower frequency.

10-15 years ago yes, even a high freq amp would have been relatively large, but a cell phone would have been a brick too!

 

[Camarok]

looks kinda like this...