E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Bavarian Soundwerks' Mobile Electronics Forum

Bavarian Soundwerks' Mobile Electronics Forum
Have all your A/V and electronics questions answered here. Ipods, A/V, Radar Detectors Oh My!
Sponsored by Bavarian Soundwerks

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-04-2013, 08:00 PM   #1
GeigerBMW
Registered User
 
Join Date: Aug 2013
Location: Midwest USA
Posts: 6
My Ride: 2003 330Ci 5 speed
Help needed - stock Business CDand Amp, new woofers but passenger side is distorted

Our 99 323 sedan showed all four mid/woofer in the rear deck and in the front doors were needing replaced shortly after we bought it. The foam surrounding the cones had crumbled to dust. I made use of the speaker baskets from the old units and installed four new inexpensive 4 ohm 6.5" Sonys:

http://www.bestbuy.com/site/Sony---6...&skuId=7780102

I spliced factory brown wires to negative on speaker terminals. I kept the original 2 ohm door tweeters in place.

When I turn it on, the passenger side speaker is VERY distorted and the passenger front is also somewhat distorted and quieter. The driver's side units seem fine. It seems to me like the amp is blown and I will tear into the trunk for that this weekend. I will first swap speakers side-to-side to see if the issue follows the speakers or the wires, but I strongly suspect the right channel on the amp is blown.

Does anyone know how to properly test the amp's channels? Is it a line-level amp? My old e30 had a speaker level amp and I would assume BMW would have changed over by 99. Is there a way to test the head unit's output going into the amp to rule it out? This is a non-HK system.

I did not want to remove the stock Business CD unit as I prefer things to look stock. So if the amp is the offending unit, is a used factory amp the best option? Any other ideas what could be culprit or troubleshooting approaches would be greatly appreciated.

Thanks in advance,
Geiger

Last edited by GeigerBMW; 09-05-2013 at 08:36 AM.
GeigerBMW is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 09-06-2013, 09:10 AM   #2
GeigerBMW
Registered User
 
Join Date: Aug 2013
Location: Midwest USA
Posts: 6
My Ride: 2003 330Ci 5 speed
^^ Bump ^^
GeigerBMW is offline   Reply With Quote
Old 09-07-2013, 07:38 PM   #3
GeigerBMW
Registered User
 
Join Date: Aug 2013
Location: Midwest USA
Posts: 6
My Ride: 2003 330Ci 5 speed
^ Bump ^
GeigerBMW is offline   Reply With Quote
Old 09-08-2013, 11:08 AM   #4
markusmarkus
Registered User
 
Join Date: Jul 2008
Location: USA
Posts: 1,672
My Ride: 2001 330Ci
Help needed - stock Business CDand Amp, new woofers but passenger side is disto

The oem amp is a 4 channel in and a 10 channel out unit. It has built in crossovers and 5 dual channel amplifier MOSFET (a semi-conductor technology) chips.

I would double check the installation of the new speakers. Testing of the amp would require an oscilloscope (an electronic instrument that produces an instantaneous trace on the screen of a cathode-ray tube corresponding to oscillations of voltage and current).

If the installation is ok I'd see if there's an oem amp for sale on this website. It should be a cheap buy.


Sent from BimmerApp mobile app
markusmarkus is offline   Reply With Quote
Reply

Tags
amplifier, blown, business cd, radio, speaker

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 01:47 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use