Low Stock Audio and Charging Issue
I have hit 2 road bumps in my installation.
First issue is a low audio output from the factory Bose system (relative to the Head Unit and no car pc).
I am 90% sure the bottle neck is the Metra wiring harness.
I say the low audio is the wiring harness because I had to rma one and the audio level was sufficient with the old unit (the replacement is a newer model with 'speaker level inputs' as opposed to RCA). With the harness' attenuator turned all the way up on the new one I get approx. 50-75% audio from the system. I also have 2 10" subs connected direct from sound card to a mono amp with no audio issues (so it is not the pc sound output).
Relevant system specs:
2007 New Body Silverado Ext. Cab w/ Bose
Metra Axxess GMOS Lan 02 wiring harness -- used to work onstar+chimes and connect pc front/rear channel audio out to factory bose.
I plan to remove the small factory sub under my center consol and put the car pc there. Would that cause the factory door speakers to get higher output from the amp and potentially fix the issue?
Is there some pre-amp-amplifier that I could run between the pc and the wiring harness to boost the gain? Or bad idea?
Its looking like live with it or buy aftermarket amp but I'd rather save the cash/time if I can.
Second issue is dimming lights when the subs hit (noticeable with gain under 50%).
There is virtually no feedback/noise from the engine so I'm inclined to say my ground is solid. Is that a correct assumption?
I think the issue is from the alternator struggling to charge a second battery I put in.
Here is my check list to try and narrow down the issue:
- -remove second battery from the charging system and see if problem persists
- -check amp ground
- -check/replace battery terminals
- -check gauge and upgrade big 3 if necessary (I have roughly 15ft of red 2/0 I could use)
- -check alternator output w/ voltmeter
The alternator is a 145amp. Would upgrading this to a HO fix things if I exhaust the checklist or would it be overkill for the approx 750 additional watts my system draws (500w bass rms, 250w pc PSU)? How many amps does my alternator need for this system?
Ignorant on much of these topics if you cant tell!