RSP-1066 80Hz crossover slope?

[dbart]

I have THX speakers that are designed to have a 2nd order roll off called for by a THX certified bass management crossover.

A THX certified crossover is one that has a 4th order low pass filter on the sub with a corner frequency of 80hz and a 2nd order high pass filter on the mains with a corner frequency of 80hz. Combine the 2nd order roll off of the mains with the 2nd order high pass filter and you get a 4th order filter that matches the 4th order low pass on the sub.

My question is this:

Does the RSP-1066 use this type of crossover slope, even though its not a THX certified piece?

Dave

[sndtowne]

Dave,

I'm not 100% sure, but I believe I read that the RSP-1066 has a 24dB per octave crossover slope for the sub output. This would be 4th. order. I am not positive what the slope is for the main speakers, but I thinks its 12dB per octave which would be 2nd. order.




Bruce

[AlvaroD]

According to the CS49326 application note (this is the chip doing all the work in the 1066), it does have a 4th order low-pass filter combined with a 2nd order high pass filter :
http://www.cirrus.com/en/pubs/appNote/an163-5.pdf

It's on page 45.