Quote Originally Posted by Old Guy View Post
Odd- Altec claims the 1753 is constant Q

Are you sure about that?

http://www.altecpro.com/pdfs/vintage...g%20Manual.pdf

Wouldn't be the first time an error on a spec sheet, but that is a big one.
No, I was wrong. Please forgive me for my failing memory and thank you for the correction. The 1753A was an attempt to get on the constant-Q band wagon. I guess I really do not recommend this model . . .

BTW: The way to tell for sure if an eq is constant-Q is to look at the graphs showing boost or cut in increments. A constant-Q filter will always have the same "slope" and the base width changes (see the 1753A data sheet). Imagine how your response would look with 3dB of cut on every slider! It would look like a saw blade.