dont know am i doing it right? a little upgrade on stock unit

604_e90325i · 03-28-2011, 02:45 PM

got a 2009 135i without Nav. I wanna make the stereo system sounds better. can i just add an 4 chanel amp to push the speakers and a mono amp to push the 2 subs under the seat?

also if i wanna change the speakers, can i just buy anyking of 4" that can fit hte door? is there anything i need to aware of since the speaerk wire is fiber optics?

thx~

ctuna · 03-28-2011, 04:14 PM

http://www.e90post.com/forums/showthread.php?t=365866

There is an 135 board I don't know if the speaker depths are the same there is
a description of the systems in the above links .

I suggest you get in contact with VP Electricity for a complete kit .
Or Technic for low cost alternatives.

http://www.e90post.com/forums/showthread.php?t=138949

03-28-2011, 02:45 PM	#1
604_e90325i Lieutenant 18 Rep 492 Posts Drives: 325i jet black Join Date: Sep 2005 Location: Vancouver iTrader: (1)	dont know am i doing it right? a little upgrade on stock unit got a 2009 135i without Nav. I wanna make the stereo system sounds better. can i just add an 4 chanel amp to push the speakers and a mono amp to push the 2 subs under the seat? also if i wanna change the speakers, can i just buy anyking of 4" that can fit hte door? is there anything i need to aware of since the speaerk wire is fiber optics? thx~
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03-28-2011, 04:14 PM	#2
ctuna Lieutenant General 1920 Rep 13,122 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	fyi http://www.e90post.com/forums/showthread.php?t=365866 There is an 135 board I don't know if the speaker depths are the same there is a description of the systems in the above links . I suggest you get in contact with VP Electricity for a complete kit . Or Technic for low cost alternatives. http://www.e90post.com/forums/showthread.php?t=138949 Last edited by ctuna; 03-28-2011 at 04:20 PM..
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