Mark Audio AP5 with AP10 bass wide design inquiry?

[gmg733]

All,

Greetings! I am thinking of building some two-way Mark Audio units using the AP5 and AP10 bass wide drivers. Does anyone have any plans in regards to this, done any testings, etc? They would server a dual role, 50/50, between music and home theater. A couple of my goals was to keep the crossover as simple as possible, 1st order if possible, and crossover around 200Hz as to not be in the predominant voice region. Having done some modeling in WinISD, I suspect the 1st order 200Hz crossover might be a bit aggressive design goal as you get into max cone excursion pretty quick. To that end, I was wondering if there were any recommended/proven designs out there. I did not find anything on Marks site for such a configuration. Looking specifically for some recommendations in regards to the crossover.

I posted this on the multi-way forum as well. But suspect there are more MA readers over on this forum.

 

[Chaz H]

While I'm hardly an authority on such matters, I want to throw my two cents in for sake of discussion. Why not cross the drivers 1st order at the point where baffle step comes into play? By doing that you could solve two problems at once: protect the A5 from low frequencies and potentially avoid the need for any BSC due to the higher efficiency of the A10. Depending on your project they would probably need to be crossed around 500-600hz. My intuition is that a crossover point higher in the midrange would not be too intrusive due to the sonic match between these two drivers.

 

[gmg733]

Good point. I did do a model using a 600Hz crossover point and things looked very well. I know MA has a AP10/AP5 'design' but can't find it published anywhere. They have one for a CSS SDX7 with AP5, but nothing for the AP10 with AP5.

I haven't determined the baffle step just yet. I'm toying with the idea of creating round/sphere fiberglass enclosures to house the drivers.

 

[chrisb]

While I'm hardly an authority on such matters, I want to throw my two cents in for sake of discussion. Why not cross the drivers 1st order at the point where baffle step comes into play? By doing that you could solve two problems at once: protect the A5 from low frequencies and potentially avoid the need for any BSC due to the higher efficiency of the A10. Depending on your project they would probably need to be crossed around 500-600hz. My intuition is that a crossover point higher in the midrange would not be too intrusive due to the sonic match between these two drivers.

good start - just don't forget a separate sub enclosure for the A5 unless running it Open Baffle