Careful examination of a large model Q-tuner's CAD plot, shows three rows of adjustable pole-pieces consisting of eleven M3 screws each. Magnetically, all M3 screws are coupled with the strings, which situation -for clearness sake- is graphically represented as XXX. Starting from XXX, Q-tuners may just sound great to begin with, so, any adjustments are merely optional. If desired, however, intensification of the sound's treble content can be achieved by transforming the magnetic coupling: XXX changes into OXO. The OXO adjustment is a graphical representation of flux centralization- for that purpose an M3 Allen key comes in handy.
Proceed as follows; leave the central row of pole-pieces untouched and screw both outside rows of pole-pieces- gradually- in a downward direction away from the string(s). Maximum effect is achieved after eleven full turns clockwise; the Q-factor, now, indicates an effervescence of high-numbered harmonics. Since the Q-factor, however, is inversely proportional to flux decentralization, transforming the magnetic coupling from XXX into XOX produces quite opposite results; emphasis on low/mid frequencies buttressed by compression, albeit at the expense of some dBs worth of dynamics. The latter proceeding for that matter, is the only "Q-tune" option which also applies to the small design being featured on the bs page. Having just one row of adjustable pole-pieces , that is, small Q-tuners are less versatile but yet strikingly effective still. In conclusion, it is emphasized that OXO XXX XOX are just examples out of a plethora of possible adjustments to be found empirically.
Hmmm....
