crossover point

[mikem]

Question, My Yamaha receiver states it will crossover 90hz and below if the speakers are set to small and bass out is set to subwoofer. I used a test CD given by a link here yesterday and tested the Hz from 40Hz to 150 trying to notice a cutoff from the mains to the sub.
I did notice a decrease in SPL on my mains once I played the test tones below 90Hz, but a good bit of sound was still coming from them. They could handle it, no problem, but I just wanted to see/hear the crossover in action. I have an HTR-5230. Am I just expecting too much or is this normal. I thought I would hear a major cutoff from the mains.
My reason for this is because I was planning on the Zaph’s 3” Hi-Vi’s that he recommend crossing over at 150 or 100 for less power. So I thought I would try 90Hz for the learning experience.
Thanks for any thoughts.

<A HREF="http://www.pesupport.com/cgi-bin/config.pl?read=254859">http://www.pesupport.com/cgi-bin/config.pl?read=254859</A>

[curt_c]

> Question, My Yamaha receiver states it will
> crossover 90hz and below if the speakers are
> set to small and bass out is set to
> subwoofer. I used a test CD given by a link
> here yesterday and tested the Hz from 40Hz
> to 150 trying to notice a cutoff from the
> mains to the sub.
> I did notice a decrease in SPL on my mains
> once I played the test tones below 90Hz, but
> a good bit of sound was still coming from
> them. They could handle it, no problem, but
> I just wanted to see/hear the crossover in
> action. I have an HTR-5230. Am I just
> expecting too much or is this normal. I
> thought I would hear a major cutoff from the
> mains.
> My reason for this is because I was planning
> on the Zaph’s 3” Hi-Vi’s that he recommend
> crossing over at 150 or 100 for less power.
> So I thought I would try 90Hz for the
> learning experience.
> Thanks for any thoughts.

The Yammy probably has a 2nd order HP filter when set to 'small'. this means that when the filter is set to 90 Hz, at 45 Hz the output from the speakers is only 12 dB down, -and still very audible...

C