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Replacing stock amplifier


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y2j514 
Copper - Posts: 94
Copper spacespace
Joined: April 26, 2007
Location: Quebec, Canada
Posted: May 13, 2015 at 10:33 PM / IP Logged Link to Post Post Reply Quote y2j514
I have a 2006 Pontiac G6 GTP with the "premium" 8 speaker monsoon sound system. It has 6.5" woofer and 1" tweeter in both doors, and two 2-way 6x9 in the rear deck. The monsoon amplifier is in the trunk on the right. Not much information is available about it specifically.
My car was the victim of a service bulletin of a water leak through a body seam which leaks right onto the amplifier. The amplifier is fried and I need my music back. A new Monsoon amplifier is almost $700 and the 3 connectors that need to be replaced will be about another $150.
I decided to go aftermarket because I can get better for a similar price. At the moment I don't want to change the stock headunit because it has my DIC built in.
My question here is how exactly do I connect the new amplifier to the stock head unit. I've asked on the G6 specific sites and I keep getting told to use a LOC. I feel like this answer is incomplete.
My understanding is that a LOC, is used to tap into AMPLIFIED wire signals to add a second amplifier. I won't have those wires because the stock amplifier is dead.
The signal wires coming from the headunit going to the stock amp are not RCAs, but I would assume that they are low level input and I can simply just remove the stock connector and put on RCA connectors and plug that into the new amplifier. However, I read somewhere on the internet that with stock headunits even the signal coming from the stock head unit may be a high input signal.
Does anybody know if it is high or low? Or how can I test it?
I do have a DMM and am familiar with how to use it.
y2j514 
Copper - Posts: 94
Copper spacespace
Joined: April 26, 2007
Location: Quebec, Canada
Posted: May 15, 2015 at 9:44 PM / IP Logged Link to Post Post Reply Quote y2j514
So using my iphone I played a constant 1Khz track through the headunit, and using a DMM on A/C I checked the voltage of the signal and it seems to be low level input like I expected. (Was just under 4V)
I figured the Monsoon system is probably a 200W system, therefore likely to be 25W x 8 channels. So using V= Root(P*R) I expected the voltages to be around 10 V with the volume at max.
I then also found a wiring diagram tonight that indicated it as "low level audio signal"
So could I just snip the ends off the GM connector and wire them to RCAs and plug them into the low end on an aftermarket amp?

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