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In Reply to: RE: Question posted by E-Stat on May 23, 2021 at 09:57:04
The OEM user's manual indicates the passive XO is the following:
Low-pass (bass): 18dB Butterworth @108Hz
High-pass (midrange/tweeter): 6dB @330Hz
http://www.magnepan.com/pdfs/manual/MG_20.1.pdf
The stock XO has always left a hole in my room.
I use a steep slope symmetric linear phase 250Hz XO which doesn't leave the hole.
Follow Ups:
"Stereo DIY GR Research OB/Dipole Subs"
Thanks.
I have run them as high as 250Hz with steep symmetric XO's to see what they could do, but needed to use my own XO and amps to do it.The plate amp had its own undefeatable DSP and XO which got in the way of what I was trying to do. Their XLR plate amp version supposedly has a defeatable XO, but the DSP can't be bypassed.
I am currently running them at 100Hz which gives some visceral bass reinforcements. I have a Stockfische test disc that has an outdoors fireworks track which hasn't sounded better.
If you cross them over too low, you lose the impact of the drums. That choice is also in part decided by room nodes based on the sub and bass panel's placements. I measured the subs and bass panels individually, looked at their respective room modes and chose the XO point that would minimize the holes.
Edits: 05/23/21
I am currently running them at 100Hz which gives some visceral bass reinforcements. I have a Stockfische test disc that has an outdoors fireworks track which hasn't sounded better.
Similarly, I let the room determine the most linear results between the 1+1s and dual subs in the HT.
Empirically, it turned out to be high pass to mains at 90 hz to fill a trough with low pass to subs at 60 hz.
I run my 2+2 down to 60hz and the 4-15" open baffles handle the rest :)
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