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This is the Manta Ray Solid State Variable filter. A lm13700 based filter with 2 signal inputs, a control voltage signal input, a resonance signal input, a low pass filter output, bandpass output, and high pass filter output. For controls, it has a 2 input signal attenuators, cut-off control, a control voltage attenuator, and a resonance control. Module runs on +/-12V and is 9 HP. The control cv input and high frequency compensation can be adjusted with the two trimpots found on the rear of the module. Guide can be found here

Creator commentary: This module has always been a tricky one to condense into a 9 HP unit and has been one of the first modules I created that required 2 pcbs to function due to the number of components required and how routing it was an absolute nightmare. There was an earlier design that had three signal inputs and three attenuators but there was a design flaw where the two trimpots were right underneath the top pcb and prevented access to them. So that was quickly changed with the revision where I took out the third signal input and attenuator to be able to position the two trimpots in a spot where you can access them, which worked out beautifully! Alongside revising the pcb, it also required to revise the 3d printed panel.

A lot of my modules would have a "basic" panel, so as you see on the left render of the panel, it's just a logo and some labels, nothing special. But right next to it is the future panel design I have in mind, with a lot more detail and decorations. It's something I want to roll out soon, it's just going to require more time to print. I almost want to say this is one of my favorite filter modules because it offers three different filter outputs which can be useful. I have considered instead of using three jack sockets to use a switch to save on costs and parts, or even integrating parts of the filter into other modules or making a more condensed pcb that just required one board rather than two.