Has anyone had any experience with Rainbow Audio replacement speakers? They are advertised as direct-replacement component speakers that are built to spec. Their website has them listed for various BMW (and other European) models: RAC - Rainbow Audio Components
If anyone has:
1- Do they produce high-quality sound?
2- Can they be used with HK-upgraded models?
3- Do they function with the in-car phone?
The replacement components seem to be sold primarily in Germany, but they are supposedly sold through Alumapro dealers in the United States. I have had horrible luck with resonances and poor sound quality from the front passenger speaker. I am not sure if it is the speaker, the head unit, the amplifier, the sound processor, or problematic wiring. The dealer replaced the speaker once -- a short-lived remedy as the sound is even worse now -- very distracting.
I want to keep everything stock and know that with HK, the options are limited. Several local dealers have said that the only option is to start from scratch. I DON'T want to replace the HU even though I know there are much better options.