PMC’s TWENTY.Sub / TWENTY.26 Review. Why buy speakers that need a separate Sub? Our Dundee6 loudspeakers are never without weight and pace, and perform to similar, if not “better” levels (22Hz frequencies present and correct, a  max dissipation of 300 – 400 Watts , and additionally a dynamic range that easily exceeds 120 dB) than a complete TWENTY.26 + TWENTY.Sub system at lower cost, with significantly fewer drive units; therefore, significantly fewer opportunities to distort the sound. We add Cleverness.