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initial help w/ setting crossovers on speakers


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4 replies to this topic

#1 of 5 OFFLINE   calvin_b

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Posted April 16 2004 - 08:06 PM

hi,

i have an onkyo ht-r500 that has only 3 crossover settings: 80, 100, and 120.

my speakers are a jlb nsp1-II system. these satellites seem bigger than i assumed. almost the size of bookshelves. i also have a polk psw303 subwoofer.

i plan on playing around w/ the settings, but where is a good place i can start w/.... maybe even something i can keep it at. set it at 80hz on the receiver and 100 on the sub? thanks.

#2 of 5 OFFLINE   ColinM

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Posted April 17 2004 - 12:39 AM

Try everything. You have nothing to lose...

Even try running them large, Sub = LR+LFE. You never know what will sound good. But you may settle on 80 for the JBL's and 60ish for the sub...
You call that a knife?

#3 of 5 OFFLINE   ScottCHI

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Posted April 17 2004 - 02:37 AM

if you're using the receiver's crossover, then the sub's crossover should either be bypassed altogether or set as high as possible.
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#4 of 5 OFFLINE   Phil Iturralde

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Posted April 17 2004 - 03:26 AM

Quote:
...where is a good place i can start w/.... maybe even something i can keep it at. set it at 80hz on the receiver and 100 on the sub?

80Hz for the AV Receiver is a good start, but if you can, I concur w/ScottCHI recommendation and turn-off the Sub's x-over if you can. If your Polk sub does not have a off (bypass) switch for the x-over then, ... dial that knob to its MAX setting. Hopefully, that will keep it from interfering** with your Onkyo x-over.

**HT Magazine ('97-'98? by Brent Butterworh) proved that when the sub and AV Receiver x-over are operating close to each other, the sub frequency blend to the speakers were no-where near the ideal ±3.5 dB blend but in all cases it was -10.5 dB or more creating quite a frequency hole (dip)!!!

Phil
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#5 of 5 OFFLINE   calvin_b

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Posted April 17 2004 - 06:31 AM

thanks guys! im going to get an SPL meter some time this weekend and get things squared away.