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I have a pair of nice looking, bad sounding two way speakers (9.5"w x 10"d x 17"h). I want to replace the drivers and re-use the boxes. The woofer has 6.5 inch basket (5.5 inch diameter to outside of surround) and the tweeter is large. I can modify the baffle if necessary, but am hoping only for the tweeter.
The reason to re-use the box is to save the time/cost of building/buying new ones. This will be my first DIY and I want something fairly easy and low cost to get my feet wet.
I know the normal advice is to just follow an established design, and I was originally going to do the Modula MT but the crossover prices have gone up dramatically, placing these in the $325 - $350 range as far as I can tell. I've decided $200 is my limit on this first attempt. I really couldn't find anything that would work in my price range and in my cabinet, so I've decided to branch out with a unique combination.
I've done some research into drivers, largely at Zaph's website, and have tentatively decided to order the Fountek FW168 6.5" woofers and Seas 27TDF tweeters. These are priced right (cheap), appropriately sized for my cabinets, and look relatively easy to crossover.
Nevertheless, I'd like some assistance or at least reassurance on the crossover. The only challenge I see is a mild dip/shelf in output for the woofer, from 1700kHz - 4kHz. Zaph's Graph
(1) How big of an issue would it be to just ignore this? Could I just throw an off-the-shelf 2kHz 12db crossover in here?
(2) Should I try to place the crossover right at the start of this dip?
(3) How low order a crossover can I get by with? (Since both drivers have (otherwise) good response at their extremes)
(4) How important is it to compensate for baffle step? I think I know how to do so, but these are bookshelf speakers that will probably be placed wherever convenient - not where they will sound best.
The reason to re-use the box is to save the time/cost of building/buying new ones. This will be my first DIY and I want something fairly easy and low cost to get my feet wet.
I know the normal advice is to just follow an established design, and I was originally going to do the Modula MT but the crossover prices have gone up dramatically, placing these in the $325 - $350 range as far as I can tell. I've decided $200 is my limit on this first attempt. I really couldn't find anything that would work in my price range and in my cabinet, so I've decided to branch out with a unique combination.
I've done some research into drivers, largely at Zaph's website, and have tentatively decided to order the Fountek FW168 6.5" woofers and Seas 27TDF tweeters. These are priced right (cheap), appropriately sized for my cabinets, and look relatively easy to crossover.
Nevertheless, I'd like some assistance or at least reassurance on the crossover. The only challenge I see is a mild dip/shelf in output for the woofer, from 1700kHz - 4kHz. Zaph's Graph
(1) How big of an issue would it be to just ignore this? Could I just throw an off-the-shelf 2kHz 12db crossover in here?
(2) Should I try to place the crossover right at the start of this dip?
(3) How low order a crossover can I get by with? (Since both drivers have (otherwise) good response at their extremes)
(4) How important is it to compensate for baffle step? I think I know how to do so, but these are bookshelf speakers that will probably be placed wherever convenient - not where they will sound best.
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