4 speaker outs, 2 speakers

[dan7532 10+ year member]

I have a hu with front and rear speaker outs, and front and rear pre-outs. I currently have four speakers. I plan to remove the 2 rear speakers. I plan to install my subwoofer, plugging it into the rear pre-out of the headunit. Here is my question. Since I am not using the rear speaker outs, is there any way I can send more power to my front speakers? My hu says 50W x 4, is there any way to wire it so it is 100w x 2? I'm a wiring n00b, thanks for any help.

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[Prowler573 5,000+ posts]

The 50w X 4 channels output rating is a Peak or Max wattage figure and is good for nothing more than marketing purposes.

Actual output will be in the neighborhood of between 15-20w of clean, undistorted power.

And no, if you're not using the rear speaker outputs there is no way to correspondingly ramp up the output on the front speaker outputs.

 

[indosia 10+ year member]

If you have component front speakers you can go 50x2 for the tweets and 50x2 for the mids. You'll need seperate crossovers for them.

 

[95BlackGA 5,000+ posts]

If you have component front speakers you can go 50x2 for the tweets and 50x2 for the mids. You'll need seperate crossovers for them.

Not to thread dump, but how do you go about doing this?

 

[kross 10+ year member]

Not to thread dump, but how do you go about doing this?

You would need an active crossover, which sits between the HU and the amp. The crossover will take the lows and send them to one set of channels on the amp, which are hooked up to the midrange speakers. The crossover will send the highs to the other set of channels, for the tweeters.

 

[indosia 10+ year member]

he dont have an amp he wants to use his head unit, right?

 

[indosia 10+ year member]

How do you delete a post?

 

[95BlackGA 5,000+ posts]

****, I was hoping I could do it with some passive crossovers. Oh well, I guess I could just find a nice little amp to power them anyway.

 

[kross 10+ year member]

****, I was hoping I could do it with some passive crossovers. Oh well, I guess I could just find a nice little amp to power them anyway.

You were wanting to do this off of HU power? Hmm, there's a couple options:

1. Some higher-end HU's have built-in crossovers. You could set the fronts to high-pass, and hook them up to the tweets. Set the rears to low-pass (actually band pass, want to filter out the subwoofer frequencies), and wire them up to the midranges.

2. Use in-line low-pass or high-pass filters on each of your channels. Parts Express has some.

If you want to use the passive crossovers that came with your set, you'll need an external 2-channel (or 4-channel in bridged mode) amp, since using only 2 channels from your HU won't be nearly enough power (about 20w x 2).

Hope this helps!

-- Kevin

 

[indosia 10+ year member]

Use the crossover that came with your component set for the tweets (50x2). For the mids an inductor wired in series will limit high freq. Although it won't damage them to wire them directly to h/u.