Can professional HU power rear fill speakers?

cdgatti · 06-18-2011, 11:12 AM

WOuld like to replace my hifi amp with afternarket amp to power front door mids/tweeters and underseat woofers. Could I do this with a 4 channel amp and just power the rears with the head unit directly? Interested in this to avoid having to buy a 5 or 6 channel amp, but still have something coming from the rear deck. Thanks.

taibanl · 06-18-2011, 12:12 PM

You would need a non-hifi head unit with speaker level outs, i would gladly trade with you. However. Just get a 6 ch amp. Youll be happier

kaigoss69 · 06-18-2011, 12:13 PM

Don't think so since the HU outputs balanced line-level signals to the amp. But I think you can get around this by leaving the HiFi amp in and only disconnecting the front pair of the balanced inputs from the HiFi amp, and leave the rear ones connected. I haven't seen this done but it should work...

06-18-2011, 11:12 AM	#1
cdgatti Colonel 255 Rep 2,547 Posts Drives: e90 328i Join Date: May 2011 Location: KY iTrader: (4)	Can professional HU power rear fill speakers? WOuld like to replace my hifi amp with afternarket amp to power front door mids/tweeters and underseat woofers. Could I do this with a 4 channel amp and just power the rears with the head unit directly? Interested in this to avoid having to buy a 5 or 6 channel amp, but still have something coming from the rear deck. Thanks.
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06-18-2011, 12:12 PM	#2
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	You would need a non-hifi head unit with speaker level outs, i would gladly trade with you. However. Just get a 6 ch amp. Youll be happier
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06-18-2011, 12:13 PM	#3
kaigoss69 Brigadier General 300 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	Don't think so since the HU outputs balanced line-level signals to the amp. But I think you can get around this by leaving the HiFi amp in and only disconnecting the front pair of the balanced inputs from the HiFi amp, and leave the rear ones connected. I haven't seen this done but it should work... __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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