Adding powered sub to base system:) - Alfa Romeo Stelvio Forum
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post #1 of 46 (permalink) Old 03-10-2019, 11:39 PM Thread Starter
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Adding powered sub to base system:)

Hey guys/gals,new here. I recently purchased a 2018 Stelvio Ti sport and was wanting to add a powered sub to enhance the base stereo system. I joined this forum hoping that I could find where someone has already gone through the process & as well had best place to tap/wire color details. Unfortunately I found nothing. So I have got the installation complete and thought I’d share my process & hope it will help someone else in need. I first started with tapping the rear door speakers, very easy to hide the wire and keep it clean. Tap each side L- orange/orange-blk stripe twisted together,,,R-green/green blk stripe,, picture includes of where I tapped to keep it clean. Returned first sub, thought it was blown till I got a second and had same problem, sounded blown and would cut out on protect mode. Do yourself a favor and purchase a LOC converter, it worked great after installing this product. It’s almost as the rear styrofoam area was meant for this sub, fit beautiful with a few modifications (drill holes for wires). While I had rear left panel off tapping remote turn on wire to 12v plug I noticed there is a spot for 3.5” speakers, so ran wire for those and have Rockford Fosgate on order. I also hooked up some basic tweeters inside that panel for a bit extra from rear. I may have left something out but hope the pictures or the proper colored wires will help someone in there attempt. Good luck
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post #2 of 46 (permalink) Old 03-11-2019, 01:17 AM
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Nice write up!

Have you noticed any rattling from the floor cover? Or are you not putting the cover over the styrofoam?

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post #3 of 46 (permalink) Old 03-11-2019, 06:14 AM
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Do you have a model number for the sub and converter?
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post #4 of 46 (permalink) Old 03-11-2019, 09:18 AM
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@Troy810washere , people like you are the ones that make road maps for others .... possibly for AR too ..... Great job man.
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post #5 of 46 (permalink) Old 03-11-2019, 02:11 PM Thread Starter
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Originally Posted by ifly4fun View Post
Do you have a model number for the sub and converter?
Here are the products I used. Be sure to turn gain on LOC all the way up & I have bass boost & xover on powered sub all the way up, gain on powered sub barley turned and on head unit treble +9, bass +4, balance/fade 3 clicks towards back speakers and it sounds as good if not better than my X5 M with premium Bose system.✌️
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post #6 of 46 (permalink) Old 03-11-2019, 02:11 PM Thread Starter
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Quote:
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@Troy810washere , people like you are the ones that make road maps for others .... possibly for AR too ..... Great job man.
Thanks ✌️
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post #7 of 46 (permalink) Old 03-11-2019, 02:14 PM Thread Starter
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Originally Posted by ALFAOFFROAD View Post
Nice write up!

Have you noticed any rattling from the floor cover? Or are you not putting the cover over the styrofoam?
No rattling @ all,(except a little mirror shake @ volume 35 &#x1f609 I have cover back on and is a clean fit as it appears nothing has been altered. Sounds perfect 👌
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post #8 of 46 (permalink) Old 03-13-2019, 12:14 AM
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Probably the best mod i've seen so far. Awesome work!!!
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post #9 of 46 (permalink) Old 03-13-2019, 12:30 AM
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No rattling you say.....


(Mirror shake...I miss mirror shake...)

Good choice on the Kicker box too BTW. Most sub companies are very overrated/priced IMO. Kicker on the other hand always seems to sound better or as good as the bigger names for a better deal. Haven't asked how it sounds, cause my guess is nice and fast with solid low end extension and good detail.

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post #10 of 46 (permalink) Old 03-13-2019, 01:13 PM Thread Starter
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Probably the best mod i've seen so far. Awesome work!!!
🙏🙏✌️
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