The Story of Teye’s (infamous) all-passive on-board guitar-filters:

1) The MOOD Filter

A great and useful filter for which I got many compliments and great reviews. But in comparison with the MOJO, kinda obsolete and honestly, now only to be found on the less expensive models. The Mood filter is a clever elaboration on what is called a ‘variable coil split’, using a trick that a friend gave Teye in 1979. Coil splits (even variable ones) only get part of the trick, and tend to sound flimsy and lacking power. The Mood proves once again that theory and drawings only get you so far, and that really good sounding stuff is designed with the EARS.

2) The MOJO

(The MOJO was filtering much much deeper and sweeter and more musical. I made some other changes to the circuit too and then installed the entire new 2014 circuit inside my own personal La Llama guitar. Amazing!) But now in comparison with the new JuJu, kinda obsolete and honestly, now only to be found on the less expensive models. The MOJO is basically an inductor coupled cleverly with Teye’s old Mood-filter.

3) And then: The Ju-Ju Command

And then I re-designed the whole lot again! And this, the v3 is much much better. In the words of a virtuoso customer: “It captures even better the entire spectrum from SC to HB. Sometimes my La Llama sounds just like a Telecaster, and then a small tweak to the control, makes it completely different again!” The JuJu is basically a series of cascaded inductors cleverly combined with a series of other filters. Hey, it’s all just the usual components: resistors, capacitors, inductors, potentiometers, inserted in choice points of the circuit, with a soldering iron. Nothing really complex, but you need to know what you’re doing, you need to have a clear vision of what you want to achieve, and you need EARS. The rest is mostly good fun!

4) The Scorpio

I’ve now made a filter that is very much like the JuJu, in that it leaves the ballsiness intact, but that is constructed in such a way that it will also work with other guitars. The Scorpio filter will be a drop-in affair and I might even make it in a pedal version! Hey, it’s all just the usual components: resistors, capacitors, inductors, potentiometers, inserted in choice points of the circuit, with a soldering iron!

I’m a tinkerer at heart, and I actually PLAY the guitars myself, and when I notice a slight sonic imperfection, I again start to tinker, until I’m truly happy again.

—>>> NOW: The Ju-Ju as DIRECT DROP-IN REPLACEMENT/UPGRADE

The fouble-decked Ju-Ju circuitry
right before it goes into the 2 glued-together caps
The highly confusing stacked PCB’s of the Ju-Ju-Command. Almost like 3D Chess (soldering)
Hand-made by me anyone? It’s all part of my quest for what my guitars should be capable of
Left (the green cap) the MOJO circuit / Right (the two yellow caps with pink tape around them) the finished Ju-Ju circuit. An easy drop-in replacement. Some soldering is required. Both MOJO and JU-JU are ‘black-boxed’

I’m now offering the Ju-Ju-Command as a DROP-IN REPLACEMENT upgrade for both the Mood and the MOJO-circuits.
The price will be $500 incl shipping, Please contact us at juju@teye-master.com if you are interested. It comes with an already connected and specially adapted-for-me potentiometer and full instructions. (You’re gonna have to either de-solder or cut some 6 wires and re-solder 6 others in their place)