[Bigmike60]

I have upgraded my 95 740 system. The Head unit does not have any Pre-outs for adding amps. I used line level converters to add two 12 in Subs. I also upgraded to blaupunt speakers through. It sounds ok but you can tell there is still a lack of good treble. The base is awesome but with the volume/speed control feature, it gets frustrating and the amp will have a tendancy to cut out at loud volumes. The only option for a truely good system is to get rid of the factory head unit and re-wire the car. Sorry.