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I replaced a Dahlquist LP1 electronic crossover with a DSPeaker 8033Sii subwoofer room correction device this weekend. Install went very smoothly although the calibration process made me aware of some buzzing bannana peeled wires that need attention. Bass and midrange are both improved. I’m using the 140 hz low pass filter, basic room correction and subsonic on the bass panels and 200uf at speaker level for the mids. Sounds like a very good blend to the mid range. Thanks again to Roger Gustovsson for his good comment that Magnepans do not need the available dipole correction filter. After fixing the banana peel I might insert the available 25-35 boost filter though. I recommend this for any 3 way Magnepans – the device is only about $350 for a demo unit at audio shows and sometimes available used. For this you get room correction plus an electronic crossover for the bass.
Follow Ups:
Thanks for posting it. Same to Roger for catching it. I saved the link for later because it really looks promising for situations like mine. I've left the subwoofer out of the music because -- for now -- I rather prefer the Mylar's "solo rendition" of the bottom, limited as it may be in some cases.
However, one day I'll finally get serious about the very low end. This is the kind of device that may allow me to leave the Mylar alone while adding deeper and more precise bass via a sub.
Yes it's a very versatile item and works great. Repaired the banana peeled wires last night (no fabric on the back allowing for a repair chore that's common for vintage Magnepans).
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