Hi,
I'am new to this forum and i have already a question. I have the OEM Business Cd in my z3. Does anyone know if it has an build-in amplifier or does it only have an external? If it is build-in how many watt does it deliver on each channel?

thnx

You have a C43 HK system. You have an external HK amp putting out 30 x 10 or 300 watts total. Hope that helps.

I don't think so. I think i don't have de Hk system. I only have the OEM compo in the doors and a pair of 4" near the seats. I don't have the Hk subwoofer between the seats. I looked everywhere but can't locate the OEM amplifier.

Originally posted by Christophe_Z3
I don't think so. I think i don't have de Hk system. I only have the OEM compo in the doors and a pair of 4" near the seats. I don't have the Hk subwoofer between the seats. I looked everywhere but can't locate the OEM amplifier.

It should be in the trunk on the drivers side behind the carpetting.