I assume that you are refering to power cords. The Designers Reference Squared refers to a power cord that is made for high current applications such as amplifiers. The designers ref. is for front end components. I cannot comment on the difference between the power cords as I have not interchanged them as my Squared is a 20 amp IEC when I replaced my Designers Ref. with A absplute Ref. on My Wadia I did notice better imaging with an improvement in the bass region also.
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