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  #13  
Old 10-19-2009, 06:34 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

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What kind of LOC do you recommend?
I usually recommended the PAC trunk-LOC, but I believe they stopped making it. Honestly, as simple as they are, usually anything halfway decent will be just fine.

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Where did you send the ground wire?
I grounded mine on one of the factory amp bolts. Probably not the best spot, but I tested it and it works just fine for me. Be sure to sand down the area very well and tighten it tight. Also, use the same size gauge wire or larger for the ground.

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Do you know what kind of screw is in the "C" Pillar? I removed the cap but didn't have a flashlight around and couldn't take it off.
I want to say 10mm bolt. Someone else should be able to confirm.

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I'm installing my old sub/amp right now but will be upgrading to new stuff in the near future. Did you run new wires to the speakers from the amp?
I did, but that was because I was previously running active and had a lot of power going to the mids. The factory 20-22 gauge was too thin for that long of a run. if you're not going to run more than 100w (maybe 125) you should be fine with the facotry wire.

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Alright, thats probably enough questions for now. Thanks for the help!
Plenty, yes. LOL j/k. Ask away bro!
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  #14  
Old 10-20-2009, 08:28 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

Matt. Idk if this the correct thread, but who did this???

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Old 10-20-2009, 08:34 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

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Matt. Idk if this the correct thread, but who did this???
Hmm, I've never seen that install before. Looks similar to TimmyB's and HarryBallz. I seriously doubt they have enough airspace in there though... unless the enclosure extends further towards the amp. That could be.
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Old 10-23-2009, 03:55 AM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

is that even good? the frame of the car is like20 cm away from the floor isnt it?
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  #17  
Old 12-02-2009, 03:56 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

ok matt, i got the ba speakers and amp from rob, how can i wire this to everything?
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  #18  
Old 12-02-2009, 04:42 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

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ok matt, i got the ba speakers and amp from rob, how can i wire this to everything?
LOL, no fawkin clue! I'm strictly an aftermarket guru

Seriously though, I thought you had to confirm that you had the proper recepticals already located back there to integrate the amplifier. Speakers are just drop-in replacements.

You may be able to wire the Boston amp yourself, but that wouldn't be any fun. Search around (other sites ) to see if anyone has done it.
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Old 12-02-2009, 04:44 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

yeah that's what i gotta find out... shall be interesting too bad i can't use my torque wrench with the amp LOLOLOLOL
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  #20  
Old 12-02-2009, 04:45 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

bahahahahahahahahahahahahaha!
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Old 12-02-2009, 06:32 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

Amazing write up Matt ... ur an asset to this forum +rep
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Old 12-02-2009, 07:13 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

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Amazing write up Matt ... ur an asset to this forum +rep
Thanks Omar! Much appreciated!!
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Old 12-02-2009, 09:31 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

Matt - can you explain impedances for us in a way we can understand? I was looking on some sites and don't get it. Also, what difference does it make for a driver / amp combo?

As an example:

Kicker 08ZX500.1 - 250W x 1 chan. @ 4 ohms 500W x 1 chan. @ 2 ohms

Obviously you want the 500W for more power to a single driver right?

So, with that said.. When looking at subs for instance the JL W6v2 like Timmy's says - Nominal Impedance: Dual 4 ohm

Im guessing that's dual voice coils, and it works best in 4 ohm configuration? Im looking here http://mobile.jlaudio.com/support_pages.php?page_id=161 and for wiring it in parallel it says Dual-4 Ohm Subwoofer: 2 Ohms - that would be the correct way to wire it to get the max power from that amp, or am i just completely missing this and am way off? lol
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Old 12-02-2009, 09:56 PM
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Re: How-To: Add a Sub/Amp to your Factory Stereo

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Originally Posted by Chris View Post
Matt - can you explain impedances for us in a way we can understand? I was looking on some sites and don't get it. Also, what difference does it make for a driver / amp combo?

As an example:

Kicker 08ZX500.1 - 250W x 1 chan. @ 4 ohms 500W x 1 chan. @ 2 ohms

Obviously you want the 500W for more power to a single driver right?

So, with that said.. When looking at subs for instance the JL W6v2 like Timmy's says - Nominal Impedance: Dual 4 ohm

Im guessing that's dual voice coils, and it works best in 4 ohm configuration? Im looking here http://mobile.jlaudio.com/support_pages.php?page_id=161 and for wiring it in parallel it says Dual-4 Ohm Subwoofer: 2 Ohms - that would be the correct way to wire it to get the max power from that amp, or am i just completely missing this and am way off? lol

There has been quite some good debate about impedance.

This is a GREAT read: Link

It's also important to note that speakers and sub woofers do not operate at their wired impedance throughout the frequency spectrum (or pass band that they are crossed over on). This phenomenon is known as impedance rise. for this quick discussion though, this really won't be necessary to expand on.

Anyways, to address your questions.

Amplifiers will be marketed to deliver different amounts of power at different ohm loads. For example;

1,000 watts @ 1 ohm
500 watts @ 2 ohm
250 watts @ 8 ohm

Generally folks will be inclined to purchase a sub woofer that can be wired down to the lowest stable ohm load the amplifier can handle to take full advantage of the power offering from the amplifier. In this case that would be 1 ohm. If you read that link above you will find some very spectacular minds explain why it is not always in your best interest to go for the highest rated ohm load your amplifier will deliver. For the average person though, it's going to be your best bet. This will help keep your gains low (help you saty away from clipping).

So amplifiers are simple. You get a certain amount of power depending on the final impedance of your wired sub woofer(s). The lower the impedance, the higher the power (*unless you are using an amplifier that provides a regulated power source - JL HD series, Alpine PDX, etc).

It's important to note that every time you double your power you only increase output by 3 decibels. So going from 50 watts to 100 watts nets you the same gain as going from 500 watts to 1,000 watts. To think that going from an amplifier that outputs 500 watts, to one that outputs 1,000 watts is going to be a big difference is absolutely ludicrous!

Now, speaker/sub woofers are a little more complicated. Honestly the best way to learn or understand how a certain voice coil configuration will wire or a multiple of sub woofers will wire is to play around with a sub woofer wiring calculator.

Here's one; Link

You'll see I selected 2 speakers each having a dual 4 ohm voice coil configuration.

For wiring 1 sub woofer, simply understand this (and the pattern);

Single 4 ohm = final impedance of only 4 ohm
Single 2 ohm = final impedance of only 2 ohm
Dual 4 ohm = final impedance of either 2 ohm or 8 ohm
Dual 2 ohm = final impedance of either 1 ohm or 4 ohm

For wiring more than one speaker, just use a calculator to understand the pattern (and wiring in a series, wiring in a parallel). Once you've played around with it for a while you'll begin to understand the pattern/trend and understand it better.

Let me know if you want anything cleared up. I know it can be confusing if you aren't familiar with some of the terminology. I tried to keep it as simple as I could. Hope it helped!
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