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The PEQ Filter PCB is a high quality Filter PCB to build a passive equalizer project. The filter circuit is based on the vintage EQP-1A with a great range of additional frequencies. Optimized grounding, audiophile designed signal pathes and a nice selection of the best parts for each frequency-band make this PEQ sounding outstanding. Classi PEQ is compatible with the sweet sounding EF inductors that come close to the original Pultec Inductors, RM-Inductor or there is an additional pin-bank to wire up any vintage Inductor with similar specifications, Sifam, Cinemag or the original Pultec Inductor. Classi PEQ is compatible to tube SRPP stages and can be used for example with the GPultec SSRP stage or the OPA stage as well. The Full Filter Kit includes pre-confectioned wires that allow wiring pots and switches fast and easily. With this filter board you can reproduce any kind of the modern or vintage passive equalizer frequency pattern - just wire up the required frequencies you wish to controll on your front-panel.
PEQ Frontpanels

Provided Frequencies

Low Frequencies
20Hz
30Hz
40Hz
60Hz
100Hz / or optional 90Hz
120Hz

High Frequencies
1K
1K5
2K
3K
4K
5K
8K
10K
12K
14K
16K

Atten Select
2K
5K / or optional 4K
8K
10K / or optional 12K
16K
20K

Wiring to Frontpanel Switches

Wiring to the Frontpanel Potentiometers

PEQ OPA Gainstage

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Accessories

Case:

V-Case is a recommended 19" Case. With 3 mounting rails you can install the Filter PCB and SRPP stage onto a second horizontal layer that can be handy for soldering or modification.

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