karls
Responses from karls
| First Order Crossovers: Pros and Cons It always amuses me when someone makes the claim "It's not audible. Well, not audible to most people most of the time, anyway. Or at least not audible to some people some of the time....."This is fundamentally no different than the claims that "al... | |
| First Order Crossovers: Pros and Cons Skrivis, great link. As always, a graph is worth a thousand words. | |
| First Order Crossovers: Pros and Cons Golix: I have to back up Roy on this. In a first-order, both drivers are at zero phase in their PASSbands, and at 90 degrees in their STOPbands. (Close, anyway. The only places either of them truly reach 0 or 90 is at DC and at infinity, both of w... | |
| First Order Crossovers: Pros and Cons Applejelly:You are indeed correct that recorded phase is a serious problem, and one which is utterly ignored by many recording engineers. However, some of them do take it seriously, along with many other aspects of their craft. So, in my opinion, ... | |
| First Order Crossovers: Pros and Cons The output of a crossover network is a vector sum with real and imaginary components in polar coordinates. What you have in a 1st order at the crossover freq is one vector at .707, +45, and the other at .707, -45, which adds to unity in vector spa... | |
| First Order Crossovers: Pros and Cons I will chime in here; Roy is correct as usual. It is not possible to fix the inherent phase problems in a second-order crossover, because they are frequency-dependent. This is simply a mathematical absolute, at least in the analog domain. And phas... | |
| First Order Crossovers: Pros and Cons Suits_me:You are correct, it is possible to make even first-order crossovers very complex, due to either inherent problems with the particular drivers chosen, or simply an obsessive need to over-engineer the problem in pursuit of a perfectly flat ... | |
| First Order Crossovers: Pros and Cons One of the major advantages of the first-order crossover, which isn't mentioned often enough, is the fundamental simplicity of the network. Every increase in crossover order is accompanied by a proportional increase in the number of network elemen... | |
| Omnidirectional speakers. The future? Interesting thread, sorry I just joined in. Only a few comments, which I'll keep brief.1. I agree in theory that the fewer room reflections the better, IF one only wants to hear what the microphones heard. However, many people want to hear more th... | |
| Low freq. from small drivers? Is it possible Here is a link which has a downloadable .doc file (as a .zip) by John Kreskovsky, which is an excellent primer on series crossovers. Note that the damping which I referred to as "Q" is called "zeta" here.http://www.geocities.com/kreskovs/Series-1.... | |
| Low freq. from small drivers? Is it possible Eldartford,My apologies again for yesterday's outbreaks, it was a pretty rough day and I'm not the best at being calm anyway. A good night's rest helps a lot.To try to explain what I was after:In the parallel case, you have two separate filters, L... | |
| Low freq. from small drivers? Is it possible And to Eldartford:I was too quick to jump on you in my last post, got my hackles up I suppose. I don't like to think of myself as a pontificator, but I do sometimes get a bit hardheaded when it comes to trying to get people to see what I'm saying.... | |
| Low freq. from small drivers? Is it possible inpepinnovations:That, unfortunately, is not a useful contribution to this discussion. Of course semantics mean something, but when it comes to filter design, math rules, whether you like it or not. If you were to put a hundred filter design exper... | |
| Low freq. from small drivers? Is it possible Eldartford,I'm not pontificating at all. It's just that things aren't as cut-and-dried as you would like to assume. The crossover point in a series crossover is a function of both the inductor and capacitor. If you want, you can change them both, ... | |
| Low freq. from small drivers? Is it possible Eldartford,If you want to learn a new way of thinking, perhaps you would do well to listen to what I said, and not continue to insist on thinking about things the way you have for 40 years. I will give you another hint, and perhaps this time you w... |