E90Post
 


Horizon LED
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Need HELP!!! another amp sub install



Reply
 
Thread Tools Search this Thread
      12-10-2014, 03:54 PM   #1
RKelley223
New Member
0
Rep
5
Posts

 
Drives: 2008 BMW 328xi
Join Date: Dec 2014
Location: WV

iTrader: (0)

Need HELP!!! another amp sub install

Hi, everyone.... I am new to the forum and have be patiently waiting to be able to post since yesterday...

Before anyone tells me to read the sticky's I have read every thread out there but nothing seems to be quite what I need.

I have a 2008 328xi with the HIFI system. I am trying to add an amp and sub in the trunk. I have bought a PAC LOC PRO 7 and hooked it into the SUB out from the factory amp...

SUB Left
red/white +
Brown/yellow -

SUB right
Red/blue+
brown/white-

The problem I am having is the pre out voltage is very low.... max I have seen is around .4 volts...
The LOC has a level gain adjustment that is maxed out... The directions said to adjust the pre out to around 2v for an amp sub install...I assumed that my LOC was defective so I purchased a similar one in hopes that would fix my problem. Unfortunately it is producing the same low voltage...

The sub does work but produces no sound... "you can feel the cone vibrate with the music if you have your hand on it"
Today I went as far as hooking up another amp to see if maybe my amp was bad but still no luck....

Any and all suggestions is GREATLY APPRECIATED....

Thanks again and sorry for posting on a topic that has so much info already out there...

Richard
Appreciate 0
      12-11-2014, 03:51 PM   #2
RKelley223
New Member
0
Rep
5
Posts

 
Drives: 2008 BMW 328xi
Join Date: Dec 2014
Location: WV

iTrader: (0)

Anybody?
Appreciate 0
      12-11-2014, 06:16 PM   #3
mathematics
Captain
mathematics's Avatar
United_States
11
Rep
669
Posts

 
Drives: 08 328i e93 alpine white
Join Date: May 2009
Location: Queens, NY

iTrader: (0)

why not use the pre-amp level instead? there's no point to using the amp output.
__________________
iPhone 5s (iTunes library/iTunes radio/Waze, etc) to Airport Express via AirPlay to Tru Technology SSLD6i via aux out of Airport Express to Helix A4S Competition. Dynaudio MD102, Esotar 1200, and MW152. Jehnert Door Cards and mid-bass'.
Appreciate 0
      12-12-2014, 02:09 PM   #4
WilliamS
GoofBall
United_States
13
Rep
922
Posts

 
Drives: 2008 E92 N54 Xdrive
Join Date: Jun 2012
Location: Tampa, FL

iTrader: (2)

This hifi not top Hifi/logic 7 correct. Mathematics asked a good question as the signal going to the factory hifi amp is low level already, no need for a converter. You can actaully just make rca's off those signal wires to your amp. If you decide you going to use the speaker side output your rca converter might not be the greatest. A line driver or a better LOC sounds to be in order.
Appreciate 0
      12-12-2014, 08:41 PM   #5
Jgio83
New Member
0
Rep
18
Posts

 
Drives: 2011 328xi
Join Date: Nov 2014
Location: New York

iTrader: (0)

Quote:
Originally Posted by WilliamS View Post
This hifi not top Hifi/logic 7 correct. Mathematics asked a good question as the signal going to the factory hifi amp is low level already, no need for a converter. You can actaully just make rca's off those signal wires to your amp. If you decide you going to use the speaker side output your rca converter might not be the greatest. A line driver or a better LOC sounds to be in order.
Agreed. No need for a Loc with base hifi system.
Appreciate 0
      12-13-2014, 02:13 PM   #6
RKelley223
New Member
0
Rep
5
Posts

 
Drives: 2008 BMW 328xi
Join Date: Dec 2014
Location: WV

iTrader: (0)

Thanks everyone... I got it...
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Forum Jump


All times are GMT -5. The time now is 12:27 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST