This is the best audio upgrade for your new BMW. Great sound quality from Ground Zero that powered by MATCH UP 7 DSP. It is has 7 Channels power output that power all your speakers in your car efficiently. The best sound quality is achieved the the comprehensive tuning software. The beauty of this setup is it is a plug and play upgrade . No wire cutting and wire tapping . Hassle free installation.
Ground Zero Speakers https://groundzerousa.com/product/gzcs-100bmw-sqa/ https://groundzerousa.com/product/gzcs-200bmw-sw/
MATCH UP 7DSP https://www.audiotec-fischer.de/en/match/amplifiers/up-7dsp