Quantum Mystic Alternative - Ross Distortion With Bax Tonestack

[rocket88]

well since there's so much issues over getting the Quantum Mystic to work right, and the fact that Mike Scheidt only uses an old ross distortion i thought about not only how to add a tonestack onto a simple normal ross distortion, but what would be a good one to have. the more i thought about it, i came to the conclusion why not just add an active Bax tonestack. this way you can get full control over your tone, without having a ton of knobs. also, i've found this to be one of my favorite tonestacks. note, the vales in the tonestack have been changed slightly to make it more bass friendly.

i haven't built this yet as i haven't had the time, and just made the layouts. i'm fairly confident these are good to go. but, as always, would be good to have another set of eyes take a look. i did my best to make this as small as i could without having too many standup resistors, i could easily get them down, but it would be larger then 18x18, which should fit in a 1590 and 125b easily.

i used the ross schematic from homewrecker, and Freppo's bax in a box. i also took the values from vinces verified trace and made the changes to the layout.





Stock Ross Values


Quantum Mystic Values for Ross Distortion Side


the trimmer according the Freppo is essentially a gain/volume-pot, so if you determine what the value should be the trimmer can be replaced with a fixed resistor. if you plan on making more then one of these, i think that would be the best option.