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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: "adding cone woofers for use under 40Hz with my modded MMGs." ... posted by Barry on March 16, 2015 at 22:00:05:
When I said "delaying the woofers" - I meant delaying the Maggie bass panels, to match the delay inherent in the sub drivers.
And if the Maggie bass panels are delayed ... the mids & ribbons must follow.
I believe you when you say "An 80Hz, 2nd order crossover frequency has an inherent group delay of about 3.125ms equivalent to 3.5ft.". I would ideally like a 24dB slope but:
* I know this produces more delay ... and the miniDSP unit I would like to use has a maximum delay of only 7ms - so a 24dB slope may not be feasible. :-((
* to make the situation worse, my subs will be 3-4' further away from my ears than the bass panels - so it would seem we are already up to ~6.25mS, using 12dB slopes @ 80Hz!
To keep to 24dB, the guy who builds the subs - who will be installing them and has the equipment to tailor and measure the DSP setup - will try increasing the XO frequency to, say, 120Hz (which I understand will not be a problem, in terms of the directionality of low bass, due to the symmetric sub placement and the fact that the subs are relatively close to the bass panels) ... but this may still not produce a low-enough delay ... so I may have to move to 12dB slopes.
Regards,
Andy
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Follow Ups
- Sorry, Barry - I didn't make myself as clear as I should've ... - andyr 01:45:36 03/17/15 (11)
- This should save you some time & give you something else to do - Barry 15:40:12 03/17/15 (10)
- RE: This should save you some time & give you something else to do - Satie 20:43:04 03/17/15 (8)
- For the uninitated like me - Barry 18:13:34 03/18/15 (7)
- RE: For the uninitated like me - Satie 06:55:02 03/20/15 (0)
- RE: For the uninitated like me - Roger Gustavsson 00:24:04 03/19/15 (5)
- RE: For the uninitated like me, no microphone - A.Wayne 12:32:02 03/27/15 (4)
- RE: For the uninitated like me, no microphone - JLindborg 14:50:23 03/27/15 (3)
- RE: For the uninitated like me, no microphone - Roger Gustavsson 07:56:11 03/28/15 (2)
- RE: For the uninitated like me, no microphone - A.Wayne 16:53:56 03/28/15 (0)
- RE: For the uninitated like me, no microphone - JLindborg 08:19:39 03/28/15 (0)
- Thanks for the links, Barry ... - andyr 16:18:15 03/17/15 (0)
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