Thought I might make a small build thread on a E60 I'm working on for a friend. The owner had a budget set in mind, and left the rest up to me. She is fond of rock music, and I don't think she has ever heard a "proper" sound system, so this should be fun!
But to set the stage here, this car was bought used, and some previous owner had made some "upgrades" himself. The car has a base sound system, meaning just mids in the doors, no tweeters, and 6,5" underseat midbass/woofers.
The "upgrade" was at first sight a JBL 2x12" premade ported box (2ohm) running off two bridged channels of a noname "4x300W" amplifier (2x25A fuses), going into protect at the first heavy bass note. As it is no way capable of 2ohm mono And a 2005 BMW base head unit with a broken CD mechanism, meaning the only audio playback was from a DAB+ adapter (digital radio) using the aux input. (Norway has switched fully to digital radio now, and the FM transmitters are basically shut down over here, just some minor local stations on a handful of weak transmitters.
So that was the starting point.
Now for the upgrade. Starting fresh with a new headunit, I bought a 2din fascia kit, and a Alpine Halo9 headunit for the car. Amplification and sound processing will be in form of a Helix M Four DSP to run the front components, and a Ground Zero GZCA 3-0SPL M1 monoblock for the subwoofers. Way overpowered, but I had it laying around and it will only be run at 2ohm.
Front speakers are Ground Zero BMW plug+play upgrade speakers, 4" components in front doors and 8" woofers under seats. Subwoofers are 2x Helix Q10W in a sealed enclosure.
Progress pics coming shortly!