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Finally finished the stands on my Modula MTMs built many moons ago (with RS28F tweeters... love me some silk domes). Just thought I'd post pix for anyone into soft core speaker porn.
They passed spousal approval and She Who Controls the Decor has approved my requisition to build a matching center channel. I know it is generally frowned upon for the poor off-axis response, but I am am building the same MTM design into a PE 1.0 cu ft. piano black box to sit on a sturdy shelf atop my TV. I brought the RS-180s in closer than in the Modula MTM build (10" center to center) and offset the tweeter as high as possible using the truncated tweeter faceplate. Hopefully that will help a bit with the canceling of frequencies off-axis...
To the extent that there is unacceptable off-axis response and I don't care to move my butt to the center of the TV to watch movies in surround sound, I was considering dropping in a 4" RS-100 below the RS-28F. Has anyone designed a bandpass crossover for this midwoofer that would work nicely with this setup? If not, is there a relatively inexpensive way to design one (i.e., without purchasing expensive software)? I don't pretend to know how steep the curve needs to be except I'm guessing it would be good to match the 8th order in the original and some sort of l-pad so that there isn't a huge midrange bump.
I've seen Jon Marsh's other designs for center channel, both MTM and WTMW, but wasn't sure if the one he did for the WTMW design study posted by dawaro would work for this application. Thanks all! :T
They passed spousal approval and She Who Controls the Decor has approved my requisition to build a matching center channel. I know it is generally frowned upon for the poor off-axis response, but I am am building the same MTM design into a PE 1.0 cu ft. piano black box to sit on a sturdy shelf atop my TV. I brought the RS-180s in closer than in the Modula MTM build (10" center to center) and offset the tweeter as high as possible using the truncated tweeter faceplate. Hopefully that will help a bit with the canceling of frequencies off-axis...
To the extent that there is unacceptable off-axis response and I don't care to move my butt to the center of the TV to watch movies in surround sound, I was considering dropping in a 4" RS-100 below the RS-28F. Has anyone designed a bandpass crossover for this midwoofer that would work nicely with this setup? If not, is there a relatively inexpensive way to design one (i.e., without purchasing expensive software)? I don't pretend to know how steep the curve needs to be except I'm guessing it would be good to match the 8th order in the original and some sort of l-pad so that there isn't a huge midrange bump.
I've seen Jon Marsh's other designs for center channel, both MTM and WTMW, but wasn't sure if the one he did for the WTMW design study posted by dawaro would work for this application. Thanks all! :T
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