10/22/2026
Someone tried to upgrade the audio in this mint 1988 BMW M3….they got the Blaupunkt Bremen right and that’s about it. 😅
The original tweeters were still in use alongside aftermarket coaxials and there was a dead Clifford alarm with cut ignition wiring.
John stripped out the old install and rebuilt it properly:
▪️ Removed the old alarm and repaired ignition wiring
▪️ Two sets of Morel Tempo Ultra 502 components
▪️ Tweeter mounting adapters designed and manufactured in house
▪️ MATCH UP 10 DSP
▪️ Remote bass k**b in place of the old alarm LED
▪️ Helix IKS10 shallow 10” sub in a custom enclosure for the spare tire well
▪️ Dynamat Xtreme + Dynaliner
▪️ Professional DSP tune 🎵 for the driver listening position
The goal was to keep everything looking original. John created custom rear tweeter adapters and ⚡️ laser-cut adapter rings for the front tweeters. He also refreshed the sun-faded rear shelf fabric and built a new two-piece trunk floor in matching fabric with a sub grille hidden underneath. A classy audio upgrade for a classic BMW E30.
Full build video drops Saturday morning on YouTube. Blog link in bio! 🎥