Δεν έχει σχέση τόσο με το class A / class AB, δηλαδή το bias, όσο με το πως οδηγεί η driver (phase inverter) το τελικό στάδιο. Τέρμα δεξιά (ΑΒ) οδηγεί και τις τέσσερις τελικές ταυτόχρονα, όσο περιστρέφεις αριστερόστροφα "αφαιρεί" τις δύο, στην ουσία αφαιρεί το σήμα που τις οδηγεί, σαν να έχεις unmatched τελικό στάδιο και τέρμα δεξιά οδηγεί μόνο τις δύο τελικές σαν single ended.
Δες από το manual,
TEXTURE
This new, patent-pending feature available only from Peavey is used to fine-tune the power sensitivity,
response and “break-up” of the power amp section of your ValveKing®
amplifier. Normal, full-power,
Class A/B operation results when the TEXTURE control is set at its fully clockwise (wide open) position
and should be used as a starting point when setting this control. As the TEXTURE control is rotated
counterclockwise, the effect of one half of the 6L6GC power tubes is progressively subtracted from the
circuit, while the gain of the driver tube is slowly increased. The driver's low-frequency
response is also altered along with the gain, resulting in more even-ordered harmonic distortion from
your power amp, even at lower-than-stage-volume settings. Finally, with the TEXTURE knob in the
fully counterclockwise position, the result is a real single-ended power amp section that operates and
responds exactly like a true Class A power amp, driven by a real single-ended high-gain tube stage.
This setting still allows the unused power tube(s) to draw idle current, thus retaining the efficiency of
the standard Class A/B topology. In this mode, power output is also reduced by as much as 60% versus
maximum rated power.
Θα σου πρότεινα να μείνεις μόνο στις περιγραφές του ήχου και να χρησιμοποιείς το Texture ανάλογα.