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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: Current Maggies run full range compared to high pass and subs. posted by rivervalley817 on December 29, 2020 at 14:33:02:
Welcome. Did that guy mean the passive line level type (PLLXO)? I played with these quite a bit a few years ago. They can be very good for cheap money.
One problem I found when biamping the older Maggie MGIIIas and 3.3Rs (which require a 3rd order low pass on the bass) is that when using an HP PLLXO, you can get phase matching issues if you are using a digital crossover for the low pass as digital XOs have a delay. The high pass comes in just before the low pass, although you can phase match it up a bit better by playing with the delay on the digital XO. Although I never tried it (but want to) using a 3rd order Active XO with opamps like a Marchand for the low pass might be much better than a digital XO as there is miniscule delay I believe. You can't easily use a 3rd order low pass PLLXO to complement the high pass PLLXO as there is too much insertion loss with 3rd order.
With the current *.7 Maggies (for biamping) I would assume it would be ok to use a PLLXO for the low pass too (as the speakers use all first order slopes), and you could then adjust the level balance with a pot on the high pass.
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Follow Ups
- RE: Current Maggies run full range compared to high pass and subs. - ColinB 15:28:33 12/29/20 (2)
- RE: Current Maggies run full range compared to high pass and subs. - rivervalley817 15:48:45 12/29/20 (1)
- RE: Current Maggies run full range compared to high pass and subs. - ColinB 16:22:28 12/29/20 (0)
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