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Old 06-05-14, 08:55 PM   #1
st1013
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Default Stock Amp Wiring

Hi Everyone,

I'm in the process of installing a sub and amp in my 3is. I have the stock audio system (non-ML, No-Nav) and wanted to know if anyone has the wiring diagram for the stock amp? I need to know which wires to tap for my amp.

Also does anyone have instructions on how to remove the stock subwoofer in the rear deck?

Thanks in Advance
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Old 06-05-14, 11:30 PM   #2
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this should get you started, its for ML i believe but it should help you out
https://drive.google.com/file/d/0B-a...it?usp=sharing

To get the rear deck lid off you will have to remove all the back seats (has side airbag as well), third brake light and C pillar panels. its not a easy one to disassemble.
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Old 06-06-14, 09:48 AM   #3
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I just did my install a couple of weekends ago and tapped the hi/lo converter into the factory subwoofer location, in which you only need to take off the panel in the trunk to access. The remote turn-on wire was tough to find, i had to just tap to the fuse box located at the driver side kick panel.
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Old 06-08-14, 06:51 PM   #4
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Thanks specONE and niccuhles! I tapped into the Rear R\L speakers on the stock amp for the hi/lo converter.
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Old 06-08-14, 08:50 PM   #5
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Quote:
Originally Posted by st1013 View Post
Thanks specONE and niccuhles! I tapped into the Rear R\L speakers on the stock amp for the hi/lo converter.
Did it sound okay?
I am not sure if the crossover points for those speakers will be good enough for Subwoofers.
it may be a bandpass signal from What I assume.
Best place may be the factory Subwoofer Honestly.
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Old 06-09-14, 01:20 PM   #6
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Have any of you attempted to vent the sub in the trunk through to the cabin? I suspect that Lexus does a good job of isolating the trunk from cabin.
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Old 06-15-14, 09:36 AM   #7
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After some trial and error, Using the speaker level inputs on my amp I figured out that using the sub inputs along with the rear inputs gave me the best sound.
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