When Saul Marantz and Jon Dahlquist created one of the world's most famous speakers, they used an amplifier with an odd name:Ampzilla. When James Bongiorno developed his Ampzilla, he declared that any true amplifier would have dual mono circuitry. His own system was a pair of Dahlquist DQ-10 with three Ampzilla II stacked on either side. (A total of 6 Ampzillas) Ampzilla II was a 200wp/ch brute with a vertical blowing fan which allowed stacking of the amplifiers. The fan's speed was governed by a rectifier held in place by a glob of silicone cement. Of the four feet on the amplifier, the right, rear screw was shorter so as not to touch the rectifier. Many people who had their Ampzilla amps "fixed" enjoyed them briefly until the right channel stopped working, because the repair person didn't know that the screw for right rear "foot" was supposed to be the short one! There is no dispute over the synergy of the Ampzilla II and the Dahlquist DQ-10a. It would seem that they were made for each other, and the sound is magical, so much so, that owners of the Time Aligned, Phased Array Dahlquist speaker couldn't tolerate the sound of any "box" speaker. Box speakers had no time alignment, and unlike the DQ-10a speakers, which were "mirror image", they all had a similar boxy sound. Adding a subwoofer to DQ-10s brings one to a much higher critical listening experience, and because the Ampzilla is a perfect amp/speaker match, they live harmoniously for a long time as "vintage" components. P.