<font color='#000000'>Manufacterers, it seems, have different standards for calibrating their volume controls. Many peg Odb as the reference level though to what they correlate, that's where the differences lie. Some would peg 0db to correlate with the rated RMS power output, say 100 watts. the negative db markings relate to attentuating that in increments of minus 1 db down to negative infiinity which means total silence, while the positive, which are often 4db to 6 db more, relates to going further up above the rated power to the point of clipping which means the amo is rated well below clipping.</font>
