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In the Forum: Horn-Loaded Speakers
In the Thread: RAAL “Water Drop” tweeter for Macondo.
Post Subject: It’s impossible to have 1st order with ribbons at speaker levelPosted by Romy the Cat on: 9/14/2007
 Paul S wrote: |
| As a certified non-expert I wonder about 1st order XO with the tweeter, because of the phase issue. Probably stupid, but I always figured that at 180 degrees you could just switch the wires... Do I remember reading somewhere on your site that you pretty much dismissed the "90 degree" issue, at least for LF? |
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Do not think about amount of degrees what you think about crossovers – it is very deceptive thing and I never take under consideration. Think about synchronization of MF an HF channels in the SAME period and do not worry about degrees.
| Paul S wrote: |
| But I have not tried 1st order on a ribbon for a long time. I have tried the 3rd order that everyone recommends fairly recently, however, and it was bad in my system. |
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I do not think it is possible to write a pure first order at speaker level with ribbons as you will always have the inductance of the Ribbon transformer. Evan the inductance kicks in a few octaves form the crossover point it still forces to tweeter to invert phase. I would never believe that it might be the case and when I got my WD I refused to do it and was bitching to Alex that his tweeter was sounding like crap. So, with ribbon filtered at speaker level you might have the first order’s harmonics but it will have the second order phase twisting
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