Looking at putting in stuff in the BMW but want to maintain the factory head unit. Through a friend, I've been told me that the output from the deck is what's called a balanced differential signal. Instead of having positive and negitive voltage swings, they are all on the positive side. Waveform still looks normal, but it just never crosses zero point. Advantage is big noise rejection characteristics as evidenced by BMW running the signal wires with all kinds of power wires to the amps.

But this is no good for connection to normal amps...although Audio Control claims to be able to recieve that kind of signal. Kinda makes me currious...I have a NIB Audio Control DQX sitting in my pile....can it eb used or is it another piece from AC that can process this sort of signal ???

Any advice would be appreciated..................

The Mazda RX8 also has a diffential balanced signal on it and we had no issues using a Audio Control 6XS on it. It was as simple as finding the preamp lines and soldering rca ends onto them and the 6XS took care of the rest. From what I remember you should be able to do the same with any Audio Control device. I am not at my shop right now, should be later and I will look into it a little more for you.

Thanks Rob............. I'd appreciate any input possible on that.

You should be able to use it in the fashion that you are considering.

Hey Rob..................


You are actually right, but yet wrong. I thought so too. But I think the DQXi (!??!) is the model that works......... the regular ole DQX doesn't So I'm a duck outta luck