Yah Soundstream!!

 

Hook up your 6X9 speakers to the amp in stereo (one per channel) then hook up the subwoofer in mixed/mono mode using a coil (value will depend on impedence of the sub).

This is how it was done back in the day!

 

im sure the 6x9 are 600W, 300RMS as i looked at the box and speaekrs. the brand name is Clifford Designs

is it possible to wire the speeakers in parallel and run the sub bridged so it looks like:

R
+ -->speaekr +
- --> sub -

L
- --> speaekr -
+ --> sub +

sorry if the questions are pissing off the pros but take the time to help a newbie

 

OK, I'll help the newb.....

I have heard a few systems over the years with only 3 speakers, and some of them were very surprising in terms of SQ and still got fairly loud.

First things first....if they are Clif Designs 6X9s, they will fry if you hit them with 300w RMS at the low end of the frequency range they claim to handle.....don't get your shorts in a knot about it, there are very few coaxials that can....

Next up, if you want to run the 3 speakers off the one 2 channel amp, you will have to check the impedance of the woofer and confirm that it is either a 4 or 8ohm speaker. This value determines the value of the coil you will need to filter out high frequencies from the woofer.

Next, hook the 2 6X9s to the amp in the regular manner, 1 per channel, making sure to keep the positive and negative leads on the right connectors at both ends. This keeps the speakers in phase, which is a good thing....

Next, you will hook up the woofer to the two outputs on the amp which are generally marked "bridge" or something similar. When you do, you will install the coil mentioned above on the posistive lead from the amp, and attach the positive speaker lead to the other side of the coil. If the woofer is 4ohms, a 7.9millihenry coil will start filtering out everything above 80hz from your woofer. A 15.9millihenry coil will do the same thing for an 8ohm woofer.

I suggest starting with those values since the 80hz region is a fairly standard point in car audio. You should be able to find the coils in any decent electrical and/or electronics supply store.

Make sure you have an decent box for the woofer, either sealed or ported, and you should be good to go.

More details on the electrical values for various frequencies can be found HERE, that whole website is an excellent source for the "nuts and bolts" part of car audio. Of course, this website is the best source for knowledgeable opinions about everything else car audio.....

HTH

 

thanks alot for taking the time to explain it to me.

greatly appreciated

 

or get an electronic crossover and another amp!

 

Good instructions on using the coil, but you need caps on the 6x9's as well or you will overload the amp because both speakers will get everything below 80hz

So, you need a 470 mf cap on in series with each 6x9, one on each channel of the amp, as well as a ciol in series with the bridged woofer.

 

Assuming he has a 4ohm woofer, I agree that caps would help keep the 6X9s from flapping in the breeze, as it were, but I would think the amp should be able to handle the 2ohm load below the crossover frequency. There could be an ugly peak right at 80hz tho.....

Maybe a lower value for the caps, 200uf or so, would help with that.....since it's only a -6db/octave slope for high and lowpass, you should be able to the frequencies a bit further apart.

Of course, a second amp with a built-in crossover would be a more flexible and powerful solution.....unfortunately more $$ than the caps and coil.....

HTH

 

SONY XPLOD XM-1252GTR
800W


would i be able to run 2ohms to this amp, i checked the stats and i think i acn but am looking for assuarance from a more expereinced tech.

 

also looking into the PB681X pyramid crystal 1000W amp, 4 channel