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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: DIGITAL only posted by Satie on August 14, 2010 at 12:59:29:
Hi Satie,
Sorry for my technical incompetance!, - thanks for the explanation, - I think I just about roughly understand that (well sort of!). So tiamping the maggies with an active crossover such as the Behringer would not be as straightforward as I thought (if you wanted to get the same good driver integration as with the stock crossover) due to the asymmetrial arrangement of the stock crossover.
So sorry for the misinformation Randy!However back to biamping and our current dilemmas, - am I right (in the post from easlier today), - in thinking Rob could just drive the bass panel actively using an active crossover and then use his now available MGIIIa external crossover box on the end of the Threshold amp?, - feeeing the mid/tweeter inputs on the speaker from the mid/mid tweeter outputs on the external crossover box, - as it has the same cap and inductor in it as the schematic you put up for him? Obviously the bass outputs on the external crossover box would be unused as the Behringer is being used as the crossover for the bass.
As for me I am in a different situation as I don't have the external crossover boxes. I am now tempted to buy them having reaslised you could do the above and that's quite simple to hook up, - would the above be accetpable from a sound point of view?, - basically drive the bass driver actively using Behringer and the mid/tweeter completely passively after the power amp? It would be nice to have the external crososver boxes in case I ever need to use just one amp on its own or if I ever wanted to resell the 3.3Rs.
Obviously I could just buy the Behringer and use that for the bass and put the first stage of the mid crososver passively at line level like you suggest in your diagram (2 resistors and 2 caps). I would not then need the external crossover boxes. Might the sound be a little better on the mid and treble doing this , as the first stage of that part of the crossver would then be line level not speaker level ? is that right?
Could I also instead go all the way and build myself a version of the entire external crossover box at line level instead? The mid/tweeter first stage does not look too hard (using the 2 resistors and 2 caps in you diagram), but is the bass part straightforward to replicate at line level too? Or is that not possible? And if it was possible would the results be as good as using the Behringer on the bass?
If I did it all passive line level I suppose I could use my Moth passive preamp between active preamp and the Quad 606 power amp (which has higher gain than the NAD208 amp I have) to balance the volume levels for the two sections.
Of course this option (building it all at line level) looks like it might be quite a bit cheaper than the other options!Thanks for the advice yet again!,
Colin
Edits: 08/14/10
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Follow Ups
- RE: DIGITAL only - Davy 14:35:18 08/14/10 (2)
- RE: DIGITAL only - Satie 16:30:17 08/15/10 (1)
- Thanks Satie, I'm getting there! - (slowly!) - Davy 17:43:28 08/15/10 (0)
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