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Re: SICK - SICK - SICK . . .
that's all I could think of as I listened to thses after work tonight. Again, I HAD to physically get up off myass to make sure the sub wasn't on, even a little (we used it for a movie last night, but it was OFF !). I built these, and I can't believe how they perform. As the poster who built a small "sub" with one of them said, this little 4" Neo woofer is the "star of the show".
Pic 1 shows the relief on the backside of the baffle behind the woofer which IMO is crucial, otherwise there's almost no room between the frame and the straight cut hole for any air to move.
Pic 2 shows the box before glueup. I had a side off to check the fit and wiring of everything. I put "kangaback" carpet (it has a closed cell foam back, kinda hard to find nowadays) on the right side ONLY (the side that's off has the convoluted foam on it) to make mounting the XO a little easier, but next pair will be foam on all 5 sides.
Pic 3 shows a prototype 5 element board. This is the board I used in the final, but the caps and one resistor have been altered, and a 3rd resistor was added.
To the previous poster, we all have different parameters that "drive" us into any particular design. For this design, my $55 budget was (for me) the only thing that was not negotiable. When I had to increase the cap values a tad, and add an extra resistor, I had to rob Peter (somewhere) to pay Paul. In this case, I had enough in the budget to drop 2 of the resistors from 10w down to 5w. (I also looked at using a #20 coil.) YOU can use botique caps and resistors when you build it if you want to. That's kinda what DIY is all about. I don't believe that this XO is the best that can be designed for this driver set, but it very well MIGHT be the best XO for them that costs less than $7.
These DO have good imaging, and I've bottomed out the woofer on one channel and the tweeter survived. Over time, if I "toast" a tweeter, I'll pop another one in there for $8. Both of these drivers should be around a while. The woofer series is new, and I think the tweeters have only been out a few years. This is the first time I've used a Dayton Neo tweeter.
Anyway, adding a shunt coil to the HP might require a cap and L-pad change. It will definately shift the phase. All things are related. I might look at the MtM idea, but I wouldn't be offended if someone else designed it either.
Right now I'm just wondering who will be the second one to hear these little monsters, and if they'll be as impressed with them as I am.
Chris
Originally posted by hyperlite
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this thread encouraged me to order 4 ND105's that i'll make MTM's out of....someday :D :D Any thoughts on a design for this? Musings? 
OP, that is a really sweet setup...i've been dying to take advantage of this deal :D You don't have a picture of the finished xover do you?
OP, that is a really sweet setup...i've been dying to take advantage of this deal :D You don't have a picture of the finished xover do you?Pic 1 shows the relief on the backside of the baffle behind the woofer which IMO is crucial, otherwise there's almost no room between the frame and the straight cut hole for any air to move.
Pic 2 shows the box before glueup. I had a side off to check the fit and wiring of everything. I put "kangaback" carpet (it has a closed cell foam back, kinda hard to find nowadays) on the right side ONLY (the side that's off has the convoluted foam on it) to make mounting the XO a little easier, but next pair will be foam on all 5 sides.
Pic 3 shows a prototype 5 element board. This is the board I used in the final, but the caps and one resistor have been altered, and a 3rd resistor was added.
To the previous poster, we all have different parameters that "drive" us into any particular design. For this design, my $55 budget was (for me) the only thing that was not negotiable. When I had to increase the cap values a tad, and add an extra resistor, I had to rob Peter (somewhere) to pay Paul. In this case, I had enough in the budget to drop 2 of the resistors from 10w down to 5w. (I also looked at using a #20 coil.) YOU can use botique caps and resistors when you build it if you want to. That's kinda what DIY is all about. I don't believe that this XO is the best that can be designed for this driver set, but it very well MIGHT be the best XO for them that costs less than $7.
These DO have good imaging, and I've bottomed out the woofer on one channel and the tweeter survived. Over time, if I "toast" a tweeter, I'll pop another one in there for $8. Both of these drivers should be around a while. The woofer series is new, and I think the tweeters have only been out a few years. This is the first time I've used a Dayton Neo tweeter.
Anyway, adding a shunt coil to the HP might require a cap and L-pad change. It will definately shift the phase. All things are related. I might look at the MtM idea, but I wouldn't be offended if someone else designed it either.
Right now I'm just wondering who will be the second one to hear these little monsters, and if they'll be as impressed with them as I am.
Chris
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