Her er impedansemålingen til Stereophile:
Andre kan nok lese dem bedre enn meg.
Som John Atkinson for eksempel. Rettet link

Andre kan nok lese dem bedre enn meg.
Som John Atkinson for eksempel. Rettet link
RoyMy estimate of the Sophia's sensitivity was 88.3dB(B)/2.83V/mthe same as the original Sophia, which I reviewed in July 2002. (See that speaker's measurements.) Though a little higher than the specified 87dB/W/m, this can be explained by the fact that the Sophia 3's impedance (fig.1) remains below 7 ohms for the entire midrange and much of the bass. It therefore draws more than 1W from the amplifier at a voltage level of 2.83V, which is equivalent to a power of 1W only into 8 ohms. I commend Wilson Audio Specialties for their honesty in specifying the Sophia 3's sensitivity. Though the impedance drops to 3.15 ohms in the upper bass and there is a combination of 5 ohms and 44° electrical phase angle at 57Hz, overall the Sophia 3 will not be hard to drive. The shape of its impedance curve will tilt the high frequencies up a little with tubed amplifiers, however.