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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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Old 10-28-2013, 06:16 PM
Jstr039 Jstr039 is offline
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Location: Auckland, NZ
 
Join Date: Oct 2013
Posts: 4
Mein Auto: E91 320i, E30 318is
Aftermarket speaker impedance question

I have an e91 pre LCI with the base professional audio package (euro spec - 6 speakers, no amp, no Nav)

Is the professional HU 2Ohm stable? If not how is it that it runs the mids and underseat woofers in parallel at 4Ohm each? Does it have something to do with the cap fitted to the factory mids?

Is there a way to replace the factory mids with components and still be connected directly to the HU in parallel with the underseat woofers - or is a 2Ohm stable external amp mandatory for that arrangement?

Last edited by Jstr039; 10-28-2013 at 06:19 PM. Reason: Ohm symbols not showing - replaced with text
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