bigugly
Well-known member
Here is a schematic of the EQ that I'm building for my small FOH rig.
The bottom circuit has a "Q" adjustment.
The design was pulled from the "Art of Electronics" and various web sources. It is a bootstrapped bridged differentiator. It will be a 1RU box 2 channels of 8 sweepable bands. I made an Excel spreadsheet to calculate what the freq. ranges will be. This is a cut only EQ. Also when using the Q control as Q is increased maximum attenuation is decreased. Q should have a range of 0.3 to near 50. Changing C4, C5 and C6 will change the overall freq. range. All the caps must be the same value and preferably 2% for best performance.
I know most people here won't need this kind of EQ but some might find it interesting.
cheers,
James
The bottom circuit has a "Q" adjustment.
The design was pulled from the "Art of Electronics" and various web sources. It is a bootstrapped bridged differentiator. It will be a 1RU box 2 channels of 8 sweepable bands. I made an Excel spreadsheet to calculate what the freq. ranges will be. This is a cut only EQ. Also when using the Q control as Q is increased maximum attenuation is decreased. Q should have a range of 0.3 to near 50. Changing C4, C5 and C6 will change the overall freq. range. All the caps must be the same value and preferably 2% for best performance.
I know most people here won't need this kind of EQ but some might find it interesting.
cheers,
James