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Discussion Starter #1
Hi guys,

I replaced my OEM navi/stereo with Erisin chinese aftermarket stereo navigation.
I left my factory speakers (Hi-Fi system) but my factory amp is out of the game now.
Can I use some adaptor to connect my factory amp? Or better to buy aftermarket amp? What is better solution for the factory speakers (sound quality, price, amount of work)?

Thanks!
 

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The factory amp is actually very good quality. It's underpowered but it still produces great sounds.

That said, the signals between the factory head unit and the factory amp are balanced differential signals. Google it. They are typically of a greater voltage than the "line level"/RCA signal produced by the typical aftermarket head unit. You can connect the new head unit directly to the factory amp (search for the wiring diagram and/or adapters; www.crutchfield.com may have an adapter). But it's a crap shoot as you can end up with music that's not very loud. Again, it depends on the aftermarket head unit.

First, you need to figure out your budget. Car audio can get very expensive, especially if you're paying a shop to do the work. The best bang for the $ is to replace the front speakers. The woofers in the front doors are 6.25" in diameter. 6.5" diameter woofers will fit with an adapter. The mid-range and the tweeter sit in the pod in the door. The mid speaker is 2" in diameter. The tweeter is tiny.

Again, go to crutchfield to see what fits.
 

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Discussion Starter #3
The factory amp is actually very good quality. It's underpowered but it still produces great sounds.
You can connect the new head unit directly to the factory amp (search for the wiring diagram and/or adapters; www.crutchfield.com may have an adapter). But it's a crap shoot as you can end up with music that's not very loud.
I'm confused... :confused:

PS Did not find any adaptors on that site :rolleyes:
 

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The signals sent by the factory head unit are balanced differential signals. The voltage level of these signals is greater than those in "line level"/RCA signals. So, if you send line level signals to the factory amp the sound may not be very loud.
 

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Discussion Starter #5
The signals sent by the factory head unit are balanced differential signals. The voltage level of these signals is greater than those in "line level"/RCA signals. So, if you send line level signals to the factory amp the sound may not be very loud.
I understand. But if I keep the factory amp, the signal to it will go not by RCA signals. Factory amp doesn't have RCA input. So the signals will be the same. As I understand..
 
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