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Sub/Speaker Crossover?

Is there an accepted "rule of thumb" when it comes to where to set the crossover between subs and speakers in two-channel?

I have Spendors that go down to around 45 and have always thought it best to set the sub crossover to 50 -- just before the Spendor starts giving out. But I have also read where some set the crossover for similar monitor speakers way up at 100! Or even lower, say 35 or 40.

It seems to me that there should be -- regardless of speaker/sub manufacturers -- a reasoned and correct crossover target. (For the record, I use ACI subs with my SP1/2s and SP100s.)

Thanks to any and all who can educate me. Just seems like, for this one, there should be a "right" and "wrong" approach.
jdmeyers77
Post removed 
jdmeyers77 OP
15 posts
 
Wow. See what I mean? :)

Thanks for all the input, folks. I used to have the REL and know they are designed for just the low stuff below what any monitor can reach -- hence the setting in the 20s.

I've always just fiddled with my subs until the bass sounds just right in Jimmy Smith's excellent "Dot Come Blues." I trust my ears. But it does seem like reasoned audiophiles have very different "rules of thumb" when it comes to this topic!

hifitime
715 posts
 
Keep in mind that a good low setting won't draw attention to your sub.Done right,nobody should know its on.
ojgalli
165 posts
 
The rule of thumb is to set the crossover one octave above the F3 of the main speakers. This much overlap is needed to get a smooth transition. If your speakers are -3 dB at 45Hz, then you should set the crossover to the sub at 90Hz. No matter where the crossover, integration is not easy. You can try to do it by ear, but test signals and an SPL meter will get you there faster and easier.
tpreaves's avatar
tpreaves
2,686 posts
 
I've always just fiddled with my subs until the bass sounds just right in Jimmy Smith's excellent "Dot Come Blues." I trust my ears.

Jd...You hit the nail on the head my man.Trust your ears,after all,you are the one listening to your system.
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