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#39917 - 09/18/02 02:42 AM How to correctly cross over?
jlib Offline
Gunslinger

Registered: 09/17/02
Posts: 31
My 950 is coming in this week and I have been a long time lurker here so I pretty much know what I need to do to set it up properly. One thing I am not real clear on, being a graduate from from a 10 year old mainstream Sony ProLogic receiver without sub output, is how to set the crossovers correctly.

Here is the output from my mains (red) and center (green)


OK, it seems clear that the mains should crossover to the sub at around 70 or 75.
I'm not sure what to do with the center. I suppose after calibration the center should be 5dB higher than currently on the graph to almost overlay the mains. But its dropoff still starts sooner than the mains so it looks like it will crossover at more like 100Hz. (The 100Hz line is actually the major one just to the left of the 100Hz legend).
Is that the correct approach? However, 100Hz is at the point were bass becomes directional though, right? Should I gap it down a bit even if the crossover is not as smooth in order to get into the non-directional realm (wherever that actually is)? It is probably something I will have to play with I know but just wondering...

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#39918 - 09/18/02 03:48 PM Re: How to correctly cross over?
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
I use 120 Hz as the crossover for my center, and have never noticed a problem with being able to localize the sub. Try it, and see what you think. But you are right, 80 - 90 Hz is supposedly the point at which it becomes a problem.
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#39919 - 09/18/02 04:57 PM Re: How to correctly cross over?
BenjaminRigby Offline
Gunslinger

Registered: 03/15/02
Posts: 120
Loc: McHenry, IL, USA
120 hz is the generally accepted frequency where direction comes into play. This is by no means a hard value though. Some people can say that slightly lower values come from over that way, but not be able to pinpoint it. You'll also need to know how the 950 crosses over, either continuously variable or at preset values (60, 90, 120 ...). I don't know which it is, but some other Outlaw user will gladly tell you.

Don't forget to just enjoy the sound too! Silly as that sounds, we need that reminder once in awhile.

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#39920 - 09/18/02 05:04 PM Re: How to correctly cross over?
steves Offline
Desperado

Registered: 06/18/01
Posts: 356
Loc: Oregon
The neat thing about the variable crossover options is that you can try 'em all (40/60/80/100/120/150) and see what you think works best. But after looking at your graph, I think I'd set the mains at 100Hz and the center at 120Hz. I don't think you'll have a bass localization problem.

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