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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Re: Maggie IIIa 3-way Active Crossover Project (long) posted by akino on February 11, 2004 at 17:38:41:
Andy,I agree with you in that listening to "before" (with the stock crossover) and "after" (with your Driverack) is the best way of getting the levels set to what they should be (which is, as you say, how Magnepan designed them).
Now, sorry, but if you feed pink noise to each driver in turn and make the dB reading the same, this will only give you the *correct* setting if the base/mid crossover is at about 210Hz (the first 3.33 octaves from 20Hz) and the mid/ribbon crossover is set at about 2,200Hz (so the mid panel covers the second 3.33 octaves, from 210Hz to 2,200Hz) and the ribbon covers the remaining 3.33 octaves.
Trouble is ... these aren't the standard Maggie IIIa crossover points!!
However, if you:
a) feed the pink noise first through the Maggie with the stock crossover - which might give you, say, 80dB on the base and 85dB on the mid/ribbon, and
b) then feed the pink noise through the Maggie with the Driverack connected and adjust the Driverack output so you get the same dB readings, this should be right.Unfortunately, I no longer have my stock crossovers to compare to!!
Regards,
Andy
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Follow Ups
- Re: Maggie IIIa 3-way Active Crossover Project (long) - andyr 02/11/0421:58:06 02/11/04 (1)
- Stay tuned - akino 03:20:34 02/12/04 (0)
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