G.A.S. Passive Crossover and Sub Box for e39 with DSP | BMW M5 Forum and M6 Forums
Custom Stereo Install in E39 M5: Follow Along | Page 2 | BMW M5 Forum and M6 Forums
Sharing audio upgrade on my non-DSP in '99 528iT. Kept OEM headunit/cassette (for looks mostly). Replaced stock speakers with Bavsounds & replaced OEM CD changer with GROM bluetooth which punches above its $150 price (BlueBus not avail ...
Bavsound Stage One Premium Speaker Upgrade Kit for BMW 5 Series 1996-2 – Dynavin North America