Bob, I'm about to start asking questions about building my crossovers on stripboard. But should I be looking to buy some mox-lites? The fact that you are keen to buy up spares makes me think it's the way to go maybe.
Or maybe designing on stripboard might be a better learning experience than trying to figure out the mox-lite boards?
Any comments welcome.
Or maybe designing on stripboard might be a better learning experience than trying to figure out the mox-lite boards?
Any comments welcome.
Jimbo,
I built my first couple of active XO's on perfboard. Not quite as handy as stripboard, but I had it. As with many perfboard project, I spent a fair amount of time troubleshooting intermittent problems. You may have better luck with stripboard.
I haven't operated my MOX boards yet, which are intended as a replacement for my latest perfboard XO. I just started stuffing them when I figured that it would be nice to have some for the next project.
My thoughts on the MOXLite board
Goods -
Compact high quality board
notch/peaking filters
Others -
negative PS seems wrong to me, but I am using offboard regulators anyway.
Each band won't easily allow bypass of un-needed sections - not too much of a problem if you want 2nd order three way, but if you are after 3rd or 4th order, you end up with an extra buffer in the high pass and maybe an unneeded high pass in the sub and mids. This is nothing that you cannot fix with a little trace cutting, though.
You probably will still need -
Buffer/line driver
Level adjustment
Phase correction - see Linkwitz
I will make the sub HP Q adjustable.
While not perfect for my application, it seems like a better solution than messing around with perfboard
Hope this helps
I built my first couple of active XO's on perfboard. Not quite as handy as stripboard, but I had it. As with many perfboard project, I spent a fair amount of time troubleshooting intermittent problems. You may have better luck with stripboard.
I haven't operated my MOX boards yet, which are intended as a replacement for my latest perfboard XO. I just started stuffing them when I figured that it would be nice to have some for the next project.
My thoughts on the MOXLite board
Goods -
Compact high quality board
notch/peaking filters
Others -
negative PS seems wrong to me, but I am using offboard regulators anyway.
Each band won't easily allow bypass of un-needed sections - not too much of a problem if you want 2nd order three way, but if you are after 3rd or 4th order, you end up with an extra buffer in the high pass and maybe an unneeded high pass in the sub and mids. This is nothing that you cannot fix with a little trace cutting, though.
You probably will still need -
Buffer/line driver
Level adjustment
Phase correction - see Linkwitz
I will make the sub HP Q adjustable.
While not perfect for my application, it seems like a better solution than messing around with perfboard
Hope this helps
Banned
Joined 2002
Andrew,
I need both - I want a readily adjustable prototyping unit and then (small) boards to implement the filters for the finished systems. I have a pair of MOX boards, but would like more to enable listening to higher order filters in stereo and/or doing three way systems.
Courtesy of Jens' Active filter manuals, I am able to calculate the component values for the MOXLite boards to match the response I get out of the MOX. I made a spreadsheet that makes the math bearable. It can be "fun" trying to find standard values that work, but that's life. Someone posted a link to a sound card impedance bridge that makes component matching easy, construction takes about half an hour, and costs maybe $10 with Radio Shack parts.
Thanks,
Bob
I need both - I want a readily adjustable prototyping unit and then (small) boards to implement the filters for the finished systems. I have a pair of MOX boards, but would like more to enable listening to higher order filters in stereo and/or doing three way systems.
Courtesy of Jens' Active filter manuals, I am able to calculate the component values for the MOXLite boards to match the response I get out of the MOX. I made a spreadsheet that makes the math bearable. It can be "fun" trying to find standard values that work, but that's life. Someone posted a link to a sound card impedance bridge that makes component matching easy, construction takes about half an hour, and costs maybe $10 with Radio Shack parts.
Thanks,
Bob
I finally put my MOX into service last night. It was just waiting on the Aleph. It is an eye opener. Active crossing makes a huge differnce in the sound... FOR THE BETTER!
You might try contacting either
http://www.delta-audio.com/Active filter two.htm
or
http://www.anidian.com/audio/home.shtml
to see if these products are still available.
You might try contacting either
http://www.delta-audio.com/Active filter two.htm
or
http://www.anidian.com/audio/home.shtml
to see if these products are still available.
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