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Help with Stock Radio, PAC AA-GM44, and Alpine KTP-445U Amp

2175 Views 3 Replies 3 Participants Last post by  anthonysmith93
Let me first start by saying I know very little about car audio, however, I can figure it out if given instructions. Secondly, I'm sure the same or similar question has been asked, but I'm struggling here. Here is what I have and what I've done already. The part I'm missing is what I need to hook up for power as well where to tap into speaker wires.

(1) I bought a PAC AA-GM44 and currently have that hooked up to my stock radio (no problems here) and to the car harness.

(2) I have the RCA cables and remote wire coming out of PAC to the inputs of a Alpine KTP-445U Amp (which is currently in my glove box)

(3) Now is where I'm confused. Some posts online say you don't need to power (yellow) and ground (black/blue) the PAC, but others do.....and if I do need to power the PAC, how should I power that?

(4) Secondly, I apparently also need to power the Amp as well? The description of the amp says it runs off the same power circuit as the receiver.

(5) Also, the other end of the Amp without the RCAs has speaker I have to connect those to my speakers somewhere?

Thanks in advance.
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Hi CGreen00,

I just saw this thread. I'm also looking at this amp myself. Let me see if I can give you a hand.

With that amp, you actually may not need the PAC. But you have it, so lets do this using it since you already have it. (This amp if I remember correctly, you could chop off the rca's and use them as speaker level inputs. You do need to flip a dip switch or two.)

So the PAC has that handy harness that sits between the stock cable and the headunit/metra harness. Even though I haven't used my PAC in a while, I still use this harness as it makes life easier with other things (Especially if you are running the stock HU).

The speaker leads come out of that harness and go into the PAC. You should not need to power the PAC seperately in this configuration, as it is getting power from the speaker leads.

Now here is the tricky part.

You need to:
a) power the alpine. This should be easy. Since you have that harness, you can use some cable taps and tap into the switched (red I beleive) and ground (black) on that harness and run it to where you have the amp.
b) (assuming you are not going to run new leads to the speakers) feed the speakers back into the factory cabling. Here is where it can get messy, but easier since you have that harness cable. If you are not afraid of hacking it apart, you can basically break the connection in the middle, before it goes to the car side of the harness. So what you will have here is one side of those cables feeds to your pac, then you will have the other side that you are going to feed your amp output into. Your going to need some wire, more of those cable taps (or a soldering iron and heat shrink) and you'll hook that to those cables.

Voila, you more or less have now done it.

Since I don't have the amp in question yet (just been thinking about it), I Can't give you pics. But I have been envisioning how I would hook it in, and this is exactly the method.

Let me know if you have any questions and I'll try to help.
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