This is probably a stupid question, but I'm just trying to understand the basics behind the hardware of some home theater equipment. Amplifiers (specifically...spereate units...not the amps in receivers) very greatly in size and weight. A first thought would be that it depends on the amount of watts...but everyone knows thats not the case. That being said, what exactly causes a amp to weigh so much versus one that doesn't. Or an amp to be the size of a house versus a slim amp. Take into comparison Krell 300cx and the Samson S1000. I know these are in totally different leagues...but I'm just trying to understand the technicals differences in the hardware. Both are two channel amps. While the Krell is mainly for normal 2 channel full range speakers, and the Samson is normally paired with SVS subwoofers...isn't it all the same when it comes to the hardware within? Obviously not though!!! So what exactly makes the two amps sooooo different while still providing relatively same amounts of power? Wattage (8 ohm): Krell - 300 Watts Samson - 340 Watts Wattage (4 ohm): Krell - 600 watts Samson - 545 watts Height: Krell - 19 inches Samson - 3.5 inches Weight: Krell - 90 pounds Samson - 36 pounds Now...please don't think that I am slamming the samson..I'm not! I'm sure it does just fine powering those SVS subs. I'm just curious (as is my nature) what kind of extra or extreemly beefed up gadgets are thrown into the Krell that make it THAT much bigger & THAT much heavier?? Power supply? probably...but it that can't be it right? There must be something else taking up all that room, and weighing so much (although power supplies do weigh a bunch)! A move to seperates will be eventual for me. While I wouldn't ever buy the Samson to power my speakers, I'm just trying to figure out what causes all the differences in amplifier size and weight when they seem to be knocking out the same amount of watts (probably different quality of watts though). Anyhow, any technical guru's out there?