Here you can see the comparison between the BMW's H/K Speakers and BSW's Rainbow/BSW speakers.
You can see the difference on quality of material with the woofers. Also, the BSW mids are definitely are better made. It was hard to see the Rainbow silk dome tweeter, but they definitely sound MUCH better than BMW H/K's tweeter.
You can see how everything fits and it is definitely plug 'n play.
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