the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

2018 Audi A3 Stock Sub Upgrade, Check My Thinking


Post ReplyPost New Topic
< Prev Topic Next Topic >
matthar 
Member - Posts: 2
Member spacespace
Joined: December 13, 2018
Location: Minnesota, United States
Posted: December 13, 2018 at 11:06 PM / IP Logged Link to Post Post Reply Quote matthar
I have a 2018 Audi A3 with the Bang & Olufsen upgraded system. This system is actually pretty good, however the subwoofer range is just not what I am used to. I cannot hear stuff in the music that I know is there. Time to upgrade.
My plan is to take the stock subwoofer signal from the B&O amp and route to an Audio Control LC2i in order to add an amp/sub upgrade. When I pulled the back dash apart I found a 4-Pin connector with 4 wires feeding into the stock sub, not 2 as I expected. The 4 wires are...
white - grey stripe
brown - blue stripe
brown - white stripe
blue - grey stripe
I sprung for a 24 hour erWin subscription and downloaded all of the manufacturer documentation on my car. In the communications documentation I found that the Bang & Olufsen 9VS system amp/control module has a 38-pin connector where pins 19-22 go to the subwoofer with their polarities listed. I then found a bit more in the wiring diagram file. Eventually found a page that showed pins 19-22 on the 38-pin connector terminated at a 4-pin connector at the subwoofer. Combining the two sources I pieced together that...
Pin #19 @amp = sub (-) = white/grey = pin#1 @sub
Pin #20 @amp = sub (+) = blue/grey = pin#2 @sub
Pin #22 @amp = sub (-) = brown/blue = pin#3 @sub
Pin #21 @amp = sub (+) = brown/white= pin#4 @sub
My assumption is that...
The sub has a left and right audio channel wired to it
The blue/grey and white/grey wires are a +/- audio channel
The brown/white and brown/blue wires are a second +/- audio channel
To hook up the LC2i line converter all I need to do is wire one pair to the left channel input and the other pair to the right channel input. The LC2i will do the rest.
Think I'm on the right track? Thoughts?
geepherder 
Platinum - Posts: 3,668
Platinum spaceThis member consistently provides reliable informationspace
Joined: October 27, 2003
Posted: December 13, 2018 at 11:49 PM / IP Logged Link to Post Post Reply Quote geepherder
You can "pop" the sub with a battery to verify polarity.
My ex once told me I have a perfect face for radio.

If you wish to post a reply to this topic, you must first login.
If you are not already registered, you must first register.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Friday, March 29, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer