Help with crossover design please *PIC*

[ts]

http://img246.imageshack.us/img246/2862/ht001uk8.jpg


I would like to change my center channel using two Dayton rs-125s-8 5 inch woofers and a Seas 29 TAF/W tweeter MTM. My right and left speakers are rs-180s with the same seas tweeter and I want to match them well.

They will be replacing my tangband 4" aluminum and dayton silk crossover seen here and will use the same sealed enclosure of .25 cubic feet in the pic I attached.

It would be great if one of you experts could once again provide me a schematic for a excellent crossover.

The components. MTM

RS125
<A HREF="http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=295-360">http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=295-360</A>

seas 29TAF/W
<A HREF="http://www.madisound.com/cgi-bin/index.cgi?cart_id=6665425.4955&pid=1934">http://www.madisound.com/cgi-bin/index.cgi?cart_id=6665425.4955&pid=1934</A>

Thanks in advance

[cjd]

I can't help you with the crossover specifically (don't see files for the tweeter on a quick peruse) but...

off-axis response will be only middling to poor, probably no more than 15 degrees before you start getting a pretty big suck-out through the core vocal range from mid-mid phase interaction. You may know this (it's probably not much different with what you have now)

Roman B's Microbe may be a vague starting point.

C

[ts]

http://img135.imageshack.us/img135/101/rs18029taf2waymh4.jpg


> I can't help you with the crossover
> specifically (don't see files for the
> tweeter on a quick peruse) but...

> off-axis response will be only middling to
> poor, probably no more than 15 degrees
> before you start getting a pretty big
> suck-out through the core vocal range from
> mid-mid phase interaction. You may know this
> (it's probably not much different with what
> you have now)

> Roman B's Microbe may be a vague starting
> point.

> C

Yeah Im aware of this. I only use the center for movies and tv and Im right on axis for that. The Tang Dayton MTM I posted will be going into my bedroom. I cant seem to find any specs for this tweeter. All I have is this diagram Roman made for me using the same tweeter and the rs180.

I attach those to see if it helps at all. All Seas says is 12 bd slope at 200hz is recommended.

[ts]

I mean Seas recommends a 12 db slobe at 2500hz

[curt_c]

> I mean Seas recommends a 12 db slobe at
> 2500hz

That's just the frequency they used to generate their power specs. They recommend 2.2K but I'll speculate crossovers as low as 1.5K 4th order are possible, especially if you flatten the impedance peak at 950 Hz with a shunt conjugate filter. At that fc, it should make for a decent center channel speaker.

C

[ts]

> That's just the frequency they used to
> generate their power specs. They recommend
> 2.2K but I'll speculate crossovers as low as
> 1.5K 4th order are possible, especially if
> you flatten the impedance peak at 950 Hz
> with a shunt conjugate filter. At that fc,
> it should make for a decent center channel
> speaker.

> C

Thanks for the info, but its all kinda over my head. Id appreciate if skomeone could provide a sceatic I could follow. I really dont understand it, I just follow the schematics and solder well.