yojoe74 Posted July 23, 2015 Share Posted July 23, 2015 So the new RP-440C center speaker has 500hz/1500hz crossovers (whereas the RP-250C has only one at 1800hz). I wouldn't mind an explanation of how that works and how a receiver crossover of 70hz or 80hz would effect the dual crossover of the RP-440C speaker. Probably a dumb question for some but..... Quote Link to comment Share on other sites More sharing options...
Paducah Home Theater Posted July 23, 2015 Share Posted July 23, 2015 (edited) I'm sure DaveWJr could explain it nicely, but I think it has to do with comb filtering and lobing issues in long center channels. Ideally a center channel would be vertical, so when you listen off-axis, the sound from each speaker hits your ears at the same time and retains its accuracy. The problem is when you turn them horizontal and also sit off-axis, you can get some weird effects going on, errors in the frequency response due to cancellation and whatnot. It's an issue in general but gets worse with wider centers. I think by limiting the frequency response of the outside speakers they are able to get the bass response that is desired, without introducing weird cancellation issues due to lobing while off-axis, basically being out of phase. Lower frequencies don't do this though. You can hear this effect on the center I built with the two 10's since it is so wide. Letting all four drivers play the same upper frequencies would do the same thing. The receiver crossover wouldn't affect anything. With the larger centers you can get away with crossing over a little lower at the receiver if you like a thicker sound but that's about all it would affect. Edited July 23, 2015 by MetropolisLakeOutfitters Quote Link to comment Share on other sites More sharing options...
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