3-Band FULLY parametric eq schematics?

[svirfnebli]

Hello All,

I'm a new user here, so if i've messed up this request please forgive me! :>

I would look to try and build a 3 band fully parametric EQ, and i've not yet been able to find any schematic to go from. Is anyone aware of ANY schematics out there for a 3-Band fully parametric EQ? My goal is not to build it exactly as is, but to modify it for my own liking. Here's my ultimate goal

- Each of the three bands would have a Dual Concentric pot for BOOST-CUT & Frequency
- Inside the box would be a trim pot to adjust the Q.
- Each of the three bands would be set to a specific frequency range (i.e. bass might be from 20-200hz or whatever)

Does anyone out there have a good schematic for anything remotely similar?

[Mark Hammer]

Here is the manual for the PAiA 4-band semi-parametric.  It doesn't have q-adjustment.
http://www.paia.com/talk/download/file.php?id=104

[aziltz]

I'm designing a 5 band project.  I'll share it when its done and verified.  it be very easy to cut two bands from it.

Each band has Q, Center Frequency and Boost/Cut controls, and you could use Dual pots or trimmers for whatever you wanted.