Connecting in a sub?

[Phade]

Hi need your expert advice.

Finished installing an amp and two 4 ohm speakers in the back of the car and would just like to know the simplest way to add in the 4ohm passive sub woofer I have. Looking at some wiring diagrams you require certain resistors and capacitors but the values are not stated? Are these required and is there a more straight forward way to do this? Any guidance or links a big help. Cheers

Phade

Click to read more...

 

[Prowler573 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/wave.gif.002382ce7d7c19757ab945cc69819de1.gif

Welcome to the forum. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

First off I have to wonder at what site you're looking at that shows resistors and capacitors being a necessity for the addition of a subwoofer?

You'll want to have some method of filtering out the frequencies typically considered midbass, midrange, and the higher frequencies seeing as a sub, naturally, isn't particularly suited to reproduce those sounds.

From the looks of things,though, wherever you're looking is wanting to make it more complicated than it has to be.

To add that subwoofer you'll need an amp which outputs an appropriate level of power for the sub you're intending to use, the correct wiring to hook up the amp, obviously, and an enclosure that is well-matched to the subwoofer it is intended to house, and some method of filtering out the frequencies that a subwoofer isn't meant to try to reproduce.

If you could provide us with a bit more information about the specific subwoofer that you're talking about as well as what comprises the rest of the setup it's being added to we'd be much more capable of giving you an educated response.

What brand of subwoofer is it?

What model number if you know?

How many voicecoils does it have and what Ohms-value are each of them?

Do you already have the amp you mean to power this sub with?

What brand and model is it?

What kind of headunit (your source unit) are you using?

Brand and model of that as well, please...

 

[XanderMoser 10+ year member]

I'm pretty sure he was looking at a diagram which was showing how to do a "3-way setup", or whatever they call them, on a 2-channel amp. Some companies show how to do this. Power 2 speakers and a sub from 2 channels. And they may use a passive crossover, hence the electronic components. But I would not recommend doing this.

I would highly suggest getting a second amp for the sub and building an enclosure. You'll be much happier with the outcome. And please give us more info, as Prowler suggested.

 

[Phade]

Hi All

Thanks for the interest.

Amp = Calibre Rally 260W two channel amp

SUB = JBL GT120 4ohm (I am pretty sure its single coil)

Speakers = Pioneer TS-E6996 (again single coil)

It des sound like I am trying to connect the sub into the two channel amp as XanderMoser has said. If i do use another amp for the sub would I need to run another power lead or would the one already in surfice?

Again any help appreciated.

Phade

 

[tru_44 10+ year member]

depends on the guage of wire if u are running 4, the u can add a fuse block and run two 8awg outputs