Just a Suggestion

Not the same thing, not even close. By using the fader we would not only reduce level, directionality would still be there.

By wiring the single speaker out of phase, we retain all the volume of 4 speakers, but now it all seems to be coming from the front.

Told you that this was a difficult concept to grasp.

 

Its really not that difficult, Bikini Calculus can help you. Not only is it fun to watch, it very accurate.

I said it was hard to understand and it is.

I've tried the crossover at the shop for a few days and it works well. I first put an MB Quart tweeter on it. It sounded a little tinny and it also sounded like it was crossed over too high. I then put it on a factory replacement 3-1/2-inch speaker, it sounded great.

Finally I put it on those cheap no name tweeters, they also sounded great. I wounder what was going on with MB Quart tweets?

 

You got it :lol:

I just wanna add one thing, this putting one rear speaker out-of-phase will not always work. The rear speakers needs to be some distance from the front. Also the rear speakers need to be some distance from the listener. An example of a truck this will not work in would be a standard cab Chev truck with 6-1/2-inch speakers in the doors and 4 x 6 in the panel right behind the driver. It might work in the extended cab, but I don't know.

 

Perfect, your thinking and your thinking is right. Because of the steeper slope, you can go to a lower frequency safely. For a 12dB/octave (one cap and one coil) 6000Hz is a pefect crossover point.

Your assuming that your dealing with a linear equation, your not (but your close enough), however your assumptions are 100% correct. The tweeter will be happier with the 12dB/octave at 6000Hz.:lol:

 

Math is your friend

Azn, start building, you've got it all figured out. One 4.7 microfarad cap and one 0.15mH coil. Your calculations are right. You should be able to find those coils pretty cheap. Iron cores are considered better, but for what we do, air core works great. I use air cores.

 

I just thought of something. Why not go for a 18dB per Octave filter. The slope is getting steep so your crossover point can be as low as 5000Hz. Thats what I did in my truck. I think the values were 5-micro (4.7 is close enough) and 16-micro. I don't remember the coil value but it was 0.1 or 0.15mH. either value would work.

Think about it. Because the slope is steep, you can go lower and therefore more audio from the tweeters. Think about it.

 

I made a mistake, the first cap C1, needs to be 5.6-microfarad. The other values are right.