Search found 3 matches

by Cuelist
Sat Jul 04, 2020 1:08 pm
Forum: Pro Audio Design
Topic: Parametric eq with only two opamp sections
Replies: 7
Views: 22023

Re: Parametric eq with only two opamp sections

FYI - The Q-range on that Crest EQ is 0.7 to 3.0
by Cuelist
Sat Jul 04, 2020 10:39 am
Forum: Pro Audio Design
Topic: Parametric eq with only two opamp sections
Replies: 7
Views: 22023

Re: Parametric eq with only two opamp sections

Here's a SIM I did on this some years back on the Crest Century V12 which has variable Q in this topology:
Crest_Century_V12_mideq_SIM.pdf
(387.86 KiB) Downloaded 552 times
Looks to me like Q and gain are not interacting too much.

Here's the schematic (also a JP design):
Crest_Century_V12_mideq.pdf
(333.64 KiB) Downloaded 603 times
by Cuelist
Sun Jun 21, 2020 9:49 am
Forum: Pro Audio Design
Topic: Parametric eq with only two opamp sections
Replies: 7
Views: 22023

Parametric eq with only two opamp sections

Hello, Just registered on this forum and thought I should make a small contribution - perhaps it will be of interest to some of you. Parametric eq's (with independently variable centre frequency, bandwidth/Q and cut/boost) are by large created using a state-variable filter consisting of to integrato...