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View Full Version : How do I hook up speakers/tweeters without a crossover?



sjv13
10-30-2012, 06:08 PM
I'm running a pair of the Focal IS 165 comps. These have integrated crossovers somehow, so there is no crossover box needed. I am running them off the Alpine KTP-445, so there was no need for me to figure out how to wire them to a "real amp" before. Now I have a 4 channel on the way, and need to figure out how this is going to work.

Here is what I have to connect: amp, woofers, tweeters.

There is no crossover involved, so I'm not really sure how I get it down to two wires (+/-) from four (woofer +/- and tweeter +/-).

Any information on how to do this would be great!

sjv13
10-31-2012, 10:04 PM
Does no one really have an answer to help me out?

mylows10
10-31-2012, 10:22 PM
use them on the hight pass filter only

zako
11-01-2012, 05:40 AM
Just hook them up the same way they're running right now on the Alpine amp.

ewadz3006
11-01-2012, 07:33 AM
Troll?

sjv13
11-01-2012, 12:07 PM
Just hook them up the same way they're running right now on the Alpine amp.

But that's the thing. I don't know what's going on with the Alpine amp because it just uses a wiring harness. Do you think I can just wire the positives of the woofers and tweeters together and the negatives of them together? Just by splicing?


Troll?

No, I'm really not. I've never wired a "real" 4 channel amp before and there is no manual for the Focals, and I can't find any information online any where about how people have hooked them up to an amp before.

>>SQL<<
11-01-2012, 12:13 PM
you are missing the crossovers, you need them

There are no magical built in crossovers

ewadz3006
11-01-2012, 01:49 PM
you are missing the crossovers, you need them

There are no magical built in crossovers

this... you need the crossovers. do a google image search and you will see what they look like. it has a input + &- (from amp) and a woofer output and a tweeter output. there is one of these for the left and one for the right speakers.

>>SQL<<
11-01-2012, 01:55 PM
you are missing these

http://i.seimg.net/images/916823/big/ps165.jpg

Sonic.
11-01-2012, 02:23 PM
Each woofer and each tweeter has an integrated 6 dB/octave crossover, hence they can be connected one per channel, as stated above, use them on hpf.

http://www.crutchfield.com/S-xVNn83tgISy/p_091IS165/Focal-Integration-IS-165.html#details-tab

sjv13
11-01-2012, 03:29 PM
you are missing the crossovers, you need them

There are no magical built in crossovers

That's actually I think somehow there are. Just look at this. It's part of the reason I bought them.
Focal Integration IS 165 6-3/4" component speaker system at Crutchfield.com (http://www.crutchfield.com/p_091IS165/Focal-Integration-IS-165.html?tp=106)

richericks
11-01-2012, 03:53 PM
Well, if no crossover is needed, run the Front RCA from your HU to the amp. At the amp end put a 'Y' splitter on each RCA. Plug the left channel RCAs into channel 1 & 3 on the amp, and the right RCA channel into channel 2 & 4. From the output side of the amp, run channel 1 to the left tweeter, run channel 2 to the right tweeter, channel 3 to the left mid, and channel 4 to the right mid. That keeps your tweeters on one gain and your mids on another, so you can dial them in independently. Although, it might be helpful to know which 4 channel amp is on the way (the Polk in your sig?).

Someone please correct me if I'm off base here.:crazy:

sjv13
11-01-2012, 04:01 PM
Well, if no crossover is needed, run the Front RCA from your HU to the amp. At the amp end put a 'Y' splitter on each RCA. Plug the left channel RCAs into channel 1 & 3 on the amp, and the right RCA channel into channel 2 & 4. From the output side of the amp, run channel 1 to the left tweeter, run channel 2 to the right tweeter, channel 3 to the left mid, and channel 4 to the right mid. That keeps your tweeters on one gain and your mids on another, so you can dial them in independently. Although, it might be helpful to know which 4 channel amp is on the way (the Polk in your sig?).

Someone please correct me if I'm off base here.:crazy:

Yes. It's the one in my sig. That might work. But I'm gonna try to see if I can contact Focal about it and see what they'd recommend.

sjv13
11-01-2012, 05:01 PM
you are missing these

*SNIP*



I know what crossovers are... I'm just not sure how to hook up my speakers to a 4 channel because they somehow don't use one. That is a selling point of the "Integration" line of speakers from Focal.

>>SQL<<
11-01-2012, 05:06 PM
ok buddy - you are right.

Your speakers have built in 6db crossovers on them.

What is it you want to do? Me personally I would run the tweeters from 2 channels of the 4 channel amp and the mid woofers on the other 2 channels.

richericks
11-01-2012, 05:35 PM
You can also use the crossovers on the amp to help out, if needed.

sjv13
11-01-2012, 05:37 PM
ok buddy - you are right.

Your speakers have built in 6db crossovers on them.

What is it you want to do? Me personally I would run the tweeters from 2 channels of the 4 channel amp and the mid woofers on the other 2 channels.

Yeah I could do that. I was planning to run 150x2 on the amp, but doing it this way would give me better control over the loudness of the tweeters, because the main reason I'm getting the bigger amp is to get more mid-bass out of my woofers.

This brings to to another question. I'll be using a DMM to set my gains, but how would I find out what RMS my tweeters and woofers can handle independently?

etm34
11-01-2012, 05:53 PM
cut out the in line crossover, its pretty simple. then you can run them how you want. when you cut it out just leave some room when you cut it to reattach it if you sell them later on.

>>SQL<<
11-01-2012, 06:34 PM
Yeah I could do that. I was planning to run 150x2 on the amp, but doing it this way would give me better control over the loudness of the tweeters, because the main reason I'm getting the bigger amp is to get more mid-bass out of my woofers.

This brings to to another question. I'll be using a DMM to set my gains, but how would I find out what RMS my tweeters and woofers can handle independently?


I would set the level for the mid woofers and then adjust the gain on the tweeters until it sounds balanced. You should not (IMO) use a DMM to set the level for the tweeters. Running each on separate channels allows you to adjust the amount of HIGHS that works best for your install.

sjv13
11-01-2012, 06:50 PM
I would set the level for the mid woofers and then adjust the gain on the tweeters until it sounds balanced. You should not (IMO) use a DMM to set the level for the tweeters. Running each on separate channels allows you to adjust the amount of HIGHS that works best for your install.

Yeah. Since the amp is 75 watts per, I would probably blow out my ear drums if I ran the tweets until I heard distortion. Haha.