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Old 01-08-2005, 07:03 AM   #1
Registered User
Join Date: Dec 2004
Location: UK
Posts: 15
My Ride: ///M3
UK Business HU Outputs

I read your posts on adding aftermarket amps to stock HU with interest. However, all your US cars seem to have seperate amps even if they are non HK. I have a standard Business HU in my UK car with no seperate amp.

Are the outputs from the HU different to those that plug into a seperate amp?

Can the speaker outputs be plugged into any amp with speaker level inputs without a differential convertor?

I have an AudioControl EQL to install between the HU and amp anyway, will this be happy with the speaker outputs from the HU?

For your interest my setup will be as follows:

Business HU with CD Changer
AudioControl EQL
Phoenix Gold X100.4
Phoneix Gold X600.1
MB Quart RCE213 Front
MB Quart RCE216 Rears
MB Quart RWE252 Subs
Bavarian Soundwerks Deck Mounted Dual Sub Box

Any help appreciated
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Old 01-09-2005, 09:46 AM   #2
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Join Date: Oct 2002
Location: Finland
Posts: 53
My Ride: BMW 316 Touring - 02
Check this other thread about aux input. There I posted the pinout of Business CD. I had one error (pin9) on the pic and there is a correction a couple of posts later. I don't have any other BMW amplifier except the one in the head unit.

I just hooked my amp to the speaker wires since there is no output available. Then I used the high level input on my amp to feed it. Has worked good for me. My amp takes in differential signal.
phuksi is offline   Reply With Quote

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