lol, thread starts on emotiva xpr 2 then goes everywhere else. In my books anyway more power is always good, and it really does not matter if you use it or not. My yamaha mx 1000 u 260 watt per channel never got used to full power on any set up i have used. Usually i would pushing 30 watt rms at most with efficient speakers or inefficient ones.
The toroid is suppose to be 2500 kva and weigh over 30 lbs in the Xpr 2. Coincidentally Triad magnetic supplies a toroid at 14.5 kg. which is 2.5 kva or 2500va, The toroid is 4.75 inches high or 120 mm in height. The width was not given. The exact size and weight seem to indicate this is the toroid used, or quite similiar. I included the link below to the toroid at mouser.
Given the width was not given, I wanted to estimate this, which i did by picture extrapolation. I resized the xpr 2 pic so you could measure 8.5 inches side to side.Then knowing the xpr 2 is 17 inches in width, i measured the width of the toroid at 3.5 inchs and multiplied by 2 to make up for half sizing. So this toroid appears to be 7 inches wide and 120mm or 4 .75 inches high and weight14.5 kgs.
I did the same estimation with the toroid in the cerwin vega cv 5000 and i get the exact same results. When my unit arrives monday or tuesday I will be able to confirm but they seem the same, so it is quite an oversized power supply in the Xpr 2.
It will be interesting to compare these two beasts, and seeing as the Cerwin Vega cv 5000 toroid rating was never published
it would appear that it is 2500 VA.
The output devices are advertised as 36 250 watt. When I looked around the only 250 watt output transistor available that I could find was Motorola. When looking at the internal pic of the xpr 2 the transistors used look like ON output transistors, (national semiconductor), not Motorola.I am thinking 250 watt output transistors must be a misprint, as the ON transistors list 250 volt and 150 watt each. It does not seem to make sense to use a 250 watt transistor, but if it is so much the better, but again maybe this is accidental on purpose embellishment?, or maybe I am just paying too much attention to details? LOL:)
http://ca.mouser.com/ProductDetail/Triad-Magnetics/VPT230-10870/?qs=sGAEpiMZZMvwUzoUXIIvyTw34uqMHR%252buHSGQD8YLZ68%3d