im curious on the liquid cooling design
well, as you may or may not know, all of the art series amps can be water cooled. The top of the amp is the heatsink like just about every amp. look at the pic of the top of the amp, notice the round, bar like part at the top and bottom? On the back of these are all the transistors (see amp guts pic). Through the bar-like part is a hole that goes all the way through the heat sink. This hole could be optionally tapped by the factory, and new end plates put on the amplifier that had holes. This was because the amp was well designed, but the designers thought that there were some installs that convection cooling would not be sufficient if the amps were mounted horizontally. There are more reasons, but this is the main one as I've been told. One of the problems with this design is that the sensor that sends the amp into protect mode is ALSO mounted on the heatsink. As logical as that seems, with watercooling, this is a bit of an oversight. If the IC's are cooled well enough, the torroidal transformer is neglected in the water cooling loop. Leaving the amp essentially unable to send itself in to protect mode in the event that the toroid gets too hot. I
have fixed this problem in my install by having four fans, each moving 70 cubic feet per minute (two per side), blowing across the amp. The endplates have been removed so that air can enter the side of the amp and flow across the transformer. This will ensure that with an 8 ohm load on the amplifer (however trivial it may seem), it will not overheat with water cooling and the amp will not die. Now, with the addition of a Thermoelectric cooling module, TEC (or peltier), the coolant will be cooled below ambient temperature. This will be important becuase when I get the a1200.2, it will see a four ohm load from my Tumult 15d2 wired in series. The amp will need some sort of additional cooling to help it survive. Remember that these amps are older, SQ class A/B beasts. They were not meant to run low ohm loads and thusly even being used at the lowest load that they are rated for can present a problem. Plus, I had all this water cooling stuff laying around from my last PC that was not going to go into my current workstation. Why let it go to waste?