front speakers 'buzzing'

skansa · 12-18-2007, 04:50 AM

hi all

I have the logic7 in an E92. I have noticed that it makes a buzzing noise from the front left and right speakers over 75mph which get louder the faster you go. the only problem is that no BMW garage will legally take your car to that speed and above!

Any thoughts on what i can do?!?

Ta

S

Serjames · 12-18-2007, 05:19 AM

Throw a massive hissey fit.

They can't legally do it, but take the service manager out with you.

Seems to me it's BMW's duty to respond to your problem, if they need to pay to put it on a transporter and drive it to an autobahn that's THEIR problem.

Alternatively why not suggest they hire out Millfield for a day at their expense so they can re-create it.

I think if you phrase this just right with customers in earshot the service manager might just suggest you take him for a quick 80mph motorway spin.

SJ

SoYank · 12-18-2007, 03:10 PM

Quote:

Originally Posted by Serjames

I think if you phrase this just right with customers in earshot the service manager might just suggest you take him for a quick 80mph motorway spin.

SJ

...and hope one of the eavesdroppers isn't a cop.

SoYank · 12-18-2007, 03:14 PM

Quote:

Originally Posted by skansa

hi all

I have the logic7 in an E92. I have noticed that it makes a buzzing noise from the front left and right speakers over 75mph which get louder the faster you go. the only problem is that no BMW garage will legally take your car to that speed and above!

Any thoughts on what i can do?!?

Ta

S

They could put it on their brake tester and "drive" it up to speed to see if the problme is some sort of electrical interference. Maybe there's an electronic filter that has failed and you're hearing the ignition.

Serjames · 12-18-2007, 03:29 PM

could it be the automatic volume device which increases volume based on speed ?

SJ

ShereKhan · 12-18-2007, 03:52 PM

Sounds like you are picking up a harmonic from your alternator or an ancillery motor maybe air con compressor? switch off climate and try.

You can recreate the speed - take the car onto a dyno run. 4th gear 100mph+

skansa · 12-19-2007, 03:22 AM

thanks chaps, i'll let you know the outcome. hopefully it will mean a short spell only in the garage for the car.

12-18-2007, 04:50 AM	#1
skansa First Lieutenant 13 Rep 312 Posts Drives: Datsun Sunny Join Date: Mar 2007 Location: Watford iTrader: (0)	front speakers 'buzzing' hi all I have the logic7 in an E92. I have noticed that it makes a buzzing noise from the front left and right speakers over 75mph which get louder the faster you go. the only problem is that no BMW garage will legally take your car to that speed and above! Any thoughts on what i can do?!? Ta S
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12-18-2007, 05:19 AM	#2
Serjames Colonel 128 Rep 2,426 Posts Drives: E93 335i M-sport Join Date: May 2007 Location: Surrey - UK iTrader: (0) Garage List 2007 E93 335i M Spo ... [0.00] 2003 Nissan Primera S [0.00]	Throw a massive hissey fit. They can't legally do it, but take the service manager out with you. Seems to me it's BMW's duty to respond to your problem, if they need to pay to put it on a transporter and drive it to an autobahn that's THEIR problem. Alternatively why not suggest they hire out Millfield for a day at their expense so they can re-create it. I think if you phrase this just right with customers in earshot the service manager might just suggest you take him for a quick 80mph motorway spin. SJ __________________
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12-18-2007, 03:29 PM	#5
Serjames Colonel 128 Rep 2,426 Posts Drives: E93 335i M-sport Join Date: May 2007 Location: Surrey - UK iTrader: (0) Garage List 2007 E93 335i M Spo ... [0.00] 2003 Nissan Primera S [0.00]	could it be the automatic volume device which increases volume based on speed ? SJ __________________
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12-18-2007, 03:52 PM	#6
ShereKhan Major 97 Rep 1,134 Posts Drives: BMW G20 330e M Sport MY20 Join Date: Sep 2006 Location: Bristol, UK iTrader: (0) Garage List 2020 BMW 330e [0.00]	Sounds like you are picking up a harmonic from your alternator or an ancillery motor maybe air con compressor? switch off climate and try. You can recreate the speed - take the car onto a dyno run. 4th gear 100mph+ __________________ 20 BMW G20 330e M Sport Portimão Blue/Cognac, Driver Pro, Tech,M+ lumbar, storage packs Long gone -15 Peugeot 308 2.0HDi GT AUTO Magnetic Blue, 10 BMW F10 520D SE Xirallic Imperial blue/Cinnamon Brown, 06 E90 320si - Le Mans Blue - Totally standard specification (Scrapped RIP 12/08/2010), 00 Peugeot 306 2.0 SE Cabriolet, 94 Rover 214 SEi, 91 Fiat Uno 60S Mk2
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12-19-2007, 03:22 AM	#7
skansa First Lieutenant 13 Rep 312 Posts Drives: Datsun Sunny Join Date: Mar 2007 Location: Watford iTrader: (0)	thanks chaps, i'll let you know the outcome. hopefully it will mean a short spell only in the garage for the car.
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