X-over design help please

[8675309]

First post on here. So be easy on me. I know this should go in automotive but I am looking xover advice from both sides.

I have built xovers before but nothing too advanced. I have had this harris tech xover for 13 years and I have never got envolved with it to the extreme I need to now.

The subject is automotive based but a general xover design that could go either way. I am looking for a simple but effective design.

Tweeter
http://www.madisound.com/catalog/pro...oducts_id=1466

Woofer
http://www.madisound.com/catalog/pro...oducts_id=8188

My crossover point I am looking at is 3500. I am looking at a 2nd order Chebychev. The drivers will be off axis The problem I am running into is the bump on the woofer. Around 500 to 700 Hz there is a large bump. Can I do away with this bump by implementing a notch filter? I added a notch filter and it would need a 140 UF cap. The information I am gathering is based off of Harris Xover design and the specs online. I have not received my speaker tester 3 to get true specs.
Will I be able to tell that big of a difference not using the notch and Lpad

Could I get by with a simple 1st order design with lpad and notch?

Also what is the Impedance EQ that can be added to the xover?

Am I going the wrong way with this? I could go active but I have decided to keep this simple consisting of a single 4 channel amp these drivers and a single 10 inch subwoofer.


It does not have to be a cheap crossover as far as parts but I am not using these on $1000 drivers.

Thanks for your help

[PeteMcK]

I wouldn't worry about the 'hump' too much, from the LSDG:

"Their published FR curves are particularly misleading. Seas apparently tests its drivers in standard enclosures in an anechoic chamber. The enclosure adds a 6 dB baffle step to the midrange, while the anechoic chamber makes the bottom end drop away severely."

A bigger problem is the high peak, too close to 3500Hz to crossover there, 2Khz would be better I think...

[tinitus]

My "simple" xo now looks like this .... it works, but takes time to tune

[8675309]

Is it possible to fix some of this with an EQ?

[MisterTwister]

I would install them in a car first. Then measure. There may be totally unexpected bumps in frequency responce. Or maybe you'll just need a single cap on tweeter

[owdi]

How will they be installed? I would recommend against such a high crossover frequency if the drivers will be spaced far apart.

You need to install the speakers into their intended environment, measure, then design your crossover. Putting that woofer into your door will result in an FR at your listening position that looks nothing like the manufacturers publish graph.

On the other hand, once you measure the FR in your car, you may become disillusioned with this whole project. A car is a terrible place for the faithful reproduction of music.

Have you considered this 2 way component set? Please buy it and tell me how it sounds, I've been thinking about it for my car.

Dan