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where do you cross over your ht setup

hello. i am just wondering where everybody else crosses over there ht system at. thx says 80hz with speakers set to small. some speaker co. say set front mains at 60hz the rest set at 80hz set to small. i even read one speaker co. in a reveiw say 20-30hz and set speakers to large. if you are driving a full range speaker system with a stand alone powered sub what do you fellow audiogoners find best. also when using a spl meter do you set up your system at 75? thanks.
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Showing 1 response by drew_eckhardt

drew_eckhardt
394 posts
 
I run full range mains (F3 30Hz, F6 20Hz, Q=.5) with an 80 Hz second order high-pass for excursion control, but plan on switching to 40 Hz 4th order.

Sealed box excursion increases 4X with each octave lower, dipoles 8X - so although my (half-space, semi-anechoic) excursion limited main speaker output is 118dB @ 80Hz and 100dB @ 40Hz it's just 82dB @ 20Hz.

Reference level home theater playback calls for 105dB regardless of frequency.
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