I'm planning to upgrade my current Logic 7, possibly to the following:

• Alpine amp(s) or similar
• 12" single sub in trunk, using custom enclosure
• BSW speakers

My main criteria is to maintain original wiring. SQ rather than dB. Max budget is mid $1,000s. I have never done any BMW audio upgrade before. I consider myself handy enough. Did an extensive upgrade on a Civic 20 years ago

Questions:

• What kind of output does the built-in Logic 7 amp have?
• Are there separate amps for the speakers and the subs under the seats?
• What kind of connectors should I buy to maintain original wiring? I saw the post from haugejan, but can't figure out what exact connectors I need to get.
• Does the head unit do any crossover functions?

 

1) High-level speaker output for every channel
2) No, just the one in the trunk
3) Sorry I can't name them
4) I believe the amp does

I'm in the middle of my project; BSW Stage I speaker upgrade for L7, Focal Solid 1 mono amp + Carpower Blackbass 10" sub in to the trunk.

- Antti -

 

Check out this thread:

https://5series.net/forums/topic/103...-built-in-loc/

 

Thanks for the responses so far. Still doing my research here. I'm browsing the audio threads, and still trying to gather the info I need.

Next questions:

1. What kind of outputs does the L7 head unit have? i.e. is it preamp level or speaker level that goes to the L7 amp in the trunk?
2. Are *all* the speakers driven by the L7 amp in the trunk, and none by the HU itself?
3. I want to replace that amp, and go completely aftermarket. I'm hoping to find preamp level lines from HU to feed my amp(s). I see only two connectors on the amp: a big multicable one, and a smaller one with two fiber optic links (is this MOST?). I believe Technic's LOC connector that he's selling would only be useful if I only want to tap some channels to add aftermarket amp for sub only. Is my assumption correct?

Sorry if I look "lazy" for not finding the right threads myself to answer my questions. Believe me I tried! It's just the info is so spread out it's hard to get my questions precisely answered.