Ok I'm sure people are getting tired of seeing my filter questions but here's another one. With my new understanding of 2nd order Butterworth filter design I set out to try to design an 8th order. I made a big excel sheet that helped calculate all the values I'd need for each stage and verified that they were all produced the same frequency and the appropriate Q for the stage. The Q of the last stage is pretty high according to the table at about 2.5.
Anyway I got a high output bump in my filter response after that last stage. Is that what's expected or have I done something wrong? If I turn down the Q of the last stage I can dial the bump down.
Here's what it looks like. I tried searching for pictures but most of what I found looks like the ideal response.
The plot below shows the response for each stage on top of one another.