DISCLAIMER: This design was created using the PCD simulated measurement process, you can read more about it here
The madisound kit worked fine for surround use, it is clearly not an optimized design. I have since learned how to design xovers through simulation. This is my attempt at a near wall monitor design, and surround speaker. Off axis response has been highly optimized, according to simulations response is within 2 db out past 80 degrees horizontally and up to 15 degrees vertically. The rolloff below 1khz is intentional to allow near wall placement for surround usage, or as monitors in a less then ideal locations. The phase integration is extremely good between drivers, even well past the xover point. The woofer has a minor peak at 4.3khz, which was actually showing up in the tweeters response due to the phase integration, a notch filter was added to the crossover due to this. The woofers TS parameters were also completely off from what has been measured, this created a hump in the low end response that required some shaping within the xover, it also means these dont go as deep as originally planned. 80hz isn't an issue with near wall placement.(This design should be sealed if used as on wall surround)
Impedance is very good, even with a 4ohm tweeter it never dips below 5 ohms, and is very high throughout the woofers range.
A + brace front/side below the woofer is all that is needed for these small cabs.
If anyone wishes to build this, inductors must maintain the same DCR values, but all other components can be changed based on your preferences
Aurasound NS6-255-8A $9 $18
Vifa DQ25SC16-04 $23 $46
This is where I am at, I should be receiving the xover components next week and post an update when completeEdited by Jay1 - 1/14/13 at 9:55pm