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Intall Help Please

SCR48

By SCR48,
in Car Audio & Electrical

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SCR48 Grand Master

SCR48

Posted
Posted

Hey All

Im just chasing some help with the final install of my stereo.... I have hooked up front and back speakers to the head deck and now just need help with amp and sub as i clearly have no idea what im doing... =]

Pic 1 + 2 are the amp and Pic 3 is the back of the head unit... about the RCA plugs on head unit it says "SW FRONT"

I have two sets of RCA cords from the wiring kit that i havent used yet so i was just chasing clear instructions on how to connect my amp to the head unit and the amp to the sub.... As im stuggling with where EXACTLY to wire the sub to on the amp......

Any help is greatly apreciated

S1.jpg

S2.jpg

S3.jpg

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tdan Contributor

tdan

Posted
Posted

Hey dude

First things first. Based on the pics posted, you have a four channel amp. However, your HU only has one set of pre-outs. So to connect your amp up to your HU, you will need to get yourself some Y-connectors/splitters. What these do is turn a two channel HU into a four channel HU (in a sense really anyway).

To get you started follow these simple steps:

1. connect the red and whites RCA plugs to the back of your HU.

2. connect one Y connector to the red plug and the other to the white plug.

3. plug the Y connectors into the amp. Matching white with white and red with red.

Congrats, you have now given the amp a sound signal. Now to connect the remote wire to turn the amp on.

1. grab some 4mm wire from your local auto shop

2. on the back of your HU, there should be the remote wire for the amp. It should be blue in colour. If you're still unsure about which wire is which, the wiring diagram should be on the top (or bottom) of the HU. That will tell you which wire it is.

3. join this wire to the wire you bought from the shop and run it to the location of your amp.

4. connect it up to your amp.

Congrats, you have given your amp a switch. Now when you trun your HU on, the amp will turn on.

Connecting your sub now depends on how many subs you have and whether or not you want to run other speakers off the amp. The best way that I would suggest would be to bridge channels 3/4 to power your sub and use channels 1 and 2 to power your front speakers. You can use the on board crossover to tune the speakers and sub to whichever frequencies you want.

Give that a go and see how it all ends up. Doing it that way, should work out to be the simplest and most effective method.

If you have any dramas, post up and let us all know.

Good luck

Tony

Silver_GT Collaborator

Silver_GT

Posted
Posted

I have only a few arguments with the above post

Leave your fronts hooked up how they are, to the headunit.

Run one set of rcas to the boot and plug one end into the back of your h/u and plug the other end into the "front" input on the amp, then for hooking your sub to the amp, you will notice that under channels 1 and 2 it says bridged and indicates which two terminals you use for "bridged mode" these are the two you want to hook your sub into.

The only time id concider using those Y splitters, is if you had a 4 channel amp and 2 subs, using the front channel for one sub and the rear channel for the other sub. Using Y splitters and running front speakers AND a sub off the same output of the headunit is never gonna sound good.

tdan Contributor

tdan

Posted
Posted
I have only a few arguments with the above post

Leave your fronts hooked up how they are, to the headunit.

Run one set of rcas to the boot and plug one end into the back of your h/u and plug the other end into the "front" input on the amp, then for hooking your sub to the amp, you will notice that under channels 1 and 2 it says bridged and indicates which two terminals you use for "bridged mode" these are the two you want to hook your sub into.

The only time id concider using those Y splitters, is if you had a 4 channel amp and 2 subs, using the front channel for one sub and the rear channel for the other sub. Using Y splitters and running front speakers AND a sub off the same output of the headunit is never gonna sound good.

Yes, that is one other set up you could use in this scenario. Both setups are good and will both sound equally as good. It does all mainly depend on the type of amp he is using and the types of sub/speakers. Again, based on the pictures the OP has posted, the amp being used has a built in crossover. This would mean that if he did use 3/4 for the sub and 1 & 2 for the front speakers, they could all be tuned separately. I have had this set up in my own cars many times before and they have sounded great for a basic set up.

Each to their own I guess

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