The initial EQ modules for this project were constructed as band pass filters, and the protoypes were built onto stripboard, and fitted into cheap 'potting boxes' to keep the cost down for what is still very much an experiment!...
The actual construction details of the stripboard for a bandpass filter are shown in the notes posted ...
(The photos on the right illustrate the various stages of that stripboard construction...
Just click on any photo to see a larger version)
The drilling template for the prototype 70 x 50 x 35mm 'potting box' enclosure shown below illustrates one suggestion for the holes required to install the potentiometer at one end, and the jack socket and power plug connectors at the other...
(Just click on the image to open a downloadable PDF version)
It is recommended that all stripboard connections (other than the potentiometer) are made using 10/0.1 - or similar - equipment wire.
The power plug connectors should be fitted into the drilled enclosure first, and the connection terminals 'splayed' vertically, to allow the stripboard (with the potentiometer PCB connections already connected) to be installed more easily.
The 2 power plug connectors are wired in parallel with tinned copper wire, to allow the 24VDC power to be 'daisy chained' in and out.
The linked power plug terminations should be soldered to the appropriate wire terminations from the stripboard (CHECK THE POLARITY !)
Finally, the jack socket should be installed and the appropriate stripboard wire connections made to the installed socket.(It can be easier to leave the socket nut loose, and fit the wires before finally aligning the socket and tightening the nut
A problem with using really cheap potting boxes as enclosures is that thay come with no 'lid'!..
One option is to cut a suitably sized section of plastic sheeting (the sort used for A4 binder separators is ideal) and attach to the enclosure using double sided sticky pads, fitted to the pot and jack socket.
The photos below illustrate an example... (click on the photos for larger versions)
As already mentioned, these simple constructions are a cheap way of trying out the concept.
I'm sure many hobbyists will have their own way of actually contructing modules like this.
There are many different types of EQ hardware unit - both commercial and hobby - but this approach offers a cheap modular way of addressing a specific problem.
Not having restrictions on the type of modules required - or indeed the order in which they are inserted into the signal chain - can give a flexible and cost effective way of addressing a specific requirement - like microphone capsule EQ correction.