I just replaced a set of 2-way speakers in a BMW 328ci & a Golf III. I was so happy to find drop-in replacements, hand made by a German company called Rainbow German Car Audio. The IQ Line of speakers are a little pricey but the sound quality is top of the line. I have installed DLS and Focal in the past and Rainbow are by far the best sounding speakers. After looking at the web page I found that they have drop in sets for just about every German car model manufactured, with no retrofitting needed. I guess they have designed each set specifically for each model of car and tuned each crossover accordingly. Thought this might be of interest to some of you with similar problems as my clients who do not want to retrofit their cars...
Mark
Metric Wrench Autos
I found most of the info using google. Their web page is
www.rainbow-audio.de and the have listed the dealer in the USA. The speaker line is IQ...