I blew the stock speakers in my GP and ordered component speakers to replace them.

Door panels removed, old speakers out, plug audio connection into the crossover, plug new speakers into cross over, put back together.

Easy peasy, lemon squeezy, right?

Nope. ALL of the wires into the door are all bundled together and wrapped and basically I can't find the wires from the stereo into the doors, so I don't have the stereo output to plug into the crossovers. I could just plug the new speakers into the existing wires and call it a day - but that defeats the purpose of buying crossovers!

Basically, help! How do I sort out the correct wires?

 

I just replaced my front door speakers so I'll give it a shot. The first thing to know is if it is the Harmon Kardon sound system or the basic one? If it is the basic one, I believe that the original door speakers had no crossover network and that the speakers were wired in parallel. All they did was put a capacitor on the tweeter to act as a high pass filter and left the woofer with the full range sound. The woofer reproduced what it could and only the tweeter was specialized. In this case, all you need to do is connect the input of the crossover to the woofer's wires and run the wires out of the crossover to the components as you normally would. Now, one of my theories is that BMW did set a lower frequency limit for the front speakers in the head unit that is higher than the rears and that is to keep them out of distortion. I say this because I tried putting a Pioneer CD player in mine with no other changes and could really tell the difference. In fact, the onboard amp in the radio absolutely destroyed one of the front speakers! The voicecoil actually came out of the magnet and stayed out. Needless to say, the stock speaker no longer functioned after this.

 

The GP doesn't have the HK system, and each speaker receives a full range signal. Use the wires at the old speaker and connect them to the input of crossover. Then you'll need to add an extra set of wires to connect the crossover to the new speakers. The wiring would be like this (assuming your new speakers have separate woofer and tweeter).

However, the OEM headunit is low power and may be a bit underpowered driving the extra load of the crossover. If you don't get enough volume or dynamics, add an amplifier or get a more powerful headunit.

Most car speakers have an internal crossover circuit, which is simply within the speaker rather than an external crossover like in component speakers.

 

Hi

Can I check that these run at 4ohms with no HK amp?