If the amp struggles power wise with the impedance dip of the Sophia from 150k-450k some cables may highlight the treble, be ultra clear and not be very fleshed out at all . I'm trying Cardas Golden Reference S/C's and I/C's and so far am happy with the results. I'm learning/hearing the placement of the Sophias balancing the bass with the mids is of equal importance in dealing with the impedance drop. With a powerful enough amp the choice should be easier.
