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“Later my mind was blown, again. I did some close-in-time comparisons between the Callistos running off their included (generic, 2-conductor 18AWG) power cords, and a pair of AudioQuest NRG-Z3 (3-conductor, thick) cords. I had no idea AC cables could make such a large difference in the sound. It wasn’t just emerging from a blacker background; everything was more crisp and exciting. The soundstage was better defined, and the music seemed louder. Instruments had more separation, and their individual characters stood out more. And voices seemed to be “flesh-and-blood present” in the room with me. The incredible realism, accuracy, and liveliness that I had been enjoying for one month with the Callistos went one step further in the right direction.

Do not even consider running your Callistos with the included power cords. Since you are running D/A processor, preamp, power amp, and speaker off a single cord, it needs to be a premium one. Is it crazy to spend $500 on a pair of AC cords for a sub-$5000 system? Not after hearing the sonic improvements they bring. You may be able to find less expensive AC cords that also work well, so experiment. I was a doubter before; I thought at most AC cords could filter some noise, but no more. With a complex unit like the Callisto, they can actually render across-the-board improvements that add up to a serious upgrade. On both solo and choral vocals, a real acid test for any system, the realism was uncanny. Every emotion and delicate touch the singers were putting in there came across clear as a bell. On Siouxsie and the Banshees’ “Scarecrow” from the album Peepshow, the sound was so intimate I felt Siouxsie was trying to seduce me (though it’s not a love song). I never even realized how much she hams it up before; it’s on the border of overdone.”

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