Well Yosemite, seems he tried to avoid the long strip we usually make when we have a lot of power transistors... installing both sides we reduce the length and this results in a more squared board in the place to be rectangle and very loooong.
MKIII was submited to high power testing using a 550VA supply
55 plus 55 volts supplies.... i have not stronger supply, so, testing must be made this way..scope is damaged too (SMPS supply to the Cathodic Ray Tube).
Measurements where made using resistive loads and multimeter..this is not precise, but can give us an idea...power simulated is shown in the attached chart.... and real power measured (with 550VA supply, or weak supply) is show in the video and also in the chart to 1.1 ohms, 2.7 ohms and 7 ohms while playing music from MP4 player.
Dx Blame MKIII is now MKIII Hx or call it Hx to be simple
Was upgraded and updated and i will publish here, for a while, only schematic...more details published in the www.diyaudio.com in the solid state section.
I am short in time..will put details here in he future.... Alex mm will provide you new boards and new layout in black and white to etch.
This amplifier cannot operate in 1 ohm anymore, had special sonics, awsome clarity, low distortion, high speed and wonderfull dinamics...can put out more than one kilowatt to each channel but distortion in this case jumped to 10 percent.
Low distortion specification is 200/340 and 500 watts and speaker impedance is 8/4 and 2 ohms while distortion is 0.008 % THD
A hair raising amplifier...the slew rate, the treble attack, dinamics are excellent....here you have a sample that is unable to make justice to the audio quality, as my digital camera is not able to record high frequencies, nor dinamics and also deep bass is not perfect.