Low cut on crossovers

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A question for the wise - I can't see the answer in the manuals!

Various crossovers, including Peavey, Behringer and dbx have a switchable low cut.

Is this low cut applied to the signal
before routing to the subwoofer out, 
or is it used for the main left and right channels,
or both?

Some other products also have these low couts - Behringer Equalisers, for example. Which principle applies there?

Regards, Ben

Edited by salzburgsoundsystem - 22 November 2011 at 12:27pm

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salzburgsoundsystem Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 January 2011 Location: Austria Status: Offline Points: 200	Post Options Post Reply Quote salzburgsoundsystem Report Post Thanks(0) Quote Reply Topic: Low cut on crossovers Posted: 22 November 2011 at 12:24pm
	A question for the wise - I can't see the answer in the manuals! Various crossovers, including Peavey, Behringer and dbx have a switchable low cut. Is this low cut applied to the signal before routing to the subwoofer out, or is it used for the main left and right channels, or both? Some other products also have these low couts - Behringer Equalisers, for example. Which principle applies there? Regards, Ben Edited by salzburgsoundsystem - 22 November 2011 at 12:27pm

jbinks Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 August 2008 Location: Portsmouth Status: Offline Points: 1310	Post Options Post Reply Quote jbinks Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 2:12pm
	Surely it makes no difference? The crossover will only output the frequency-range affected by the low-cut to the sub out anyway. That's the whole point of a crossover! So it makes no difference if you cut them out "at the start" or on the sub output only.

cravings Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7442	Post Options Post Reply Quote cravings Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 2:25pm
	like the 25hz low cut buttons on the behringer analogue ones? it's there as a safety really.. to cut the very low frequencies.. and it's on the inputs in that case.

salzburgsoundsystem Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 January 2011 Location: Austria Status: Offline Points: 200	Post Options Post Reply Quote salzburgsoundsystem Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 2:36pm
	Excellent! My new cabinets are safely within xmax down to 20 Hz, so a 25Hz low cut would do the trick. Thanks!

salzburgsoundsystem Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 January 2011 Location: Austria Status: Offline Points: 200	Post Options Post Reply Quote salzburgsoundsystem Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 2:41pm
	cravings - may I ask how you know that - did I miss it in the specs? Regards, Ben

cravings Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7442	Post Options Post Reply Quote cravings Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 3:02pm
	Switchable 25 Hz Low cut filter on each input for low-frequency driver protection http://www.behringer.com/EN/Products/CX2310.aspx it's written on the spec...

salzburgsoundsystem Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 January 2011 Location: Austria Status: Offline Points: 200	Post Options Post Reply Quote salzburgsoundsystem Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 3:05pm
	so it is. I must have speed-read that bit! Now to find out how steep the filter is...

salzburgsoundsystem Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 January 2011 Location: Austria Status: Offline Points: 200	Post Options Post Reply Quote salzburgsoundsystem Report Post Thanks(0) Quote Reply Posted: 22 November 2011 at 3:09pm
	If I'm lucky, it'll be 24dB / octave like the rest of em!