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Join Date: Dec 2007
Location: Madison, Alabama
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Originally Posted by ray587
So how does a Sunfire Cinema do 400 watts x 5 all channels driven with a 540 watt power supply? Just wondering.
It is known that Sunfire doesn't rate theirs at full power. Not sure about the older 5200 and 5400 series but the 7200 and 7400 series have the power consumption at 1/8th power. Looking at the power consumption/rating on the back of the AMP/AVR is just gives us a general idea of what power supply is inside. I think most of the mass-market AVR companies use either full or near full power draw. Sunfire probably does it to avoid a stigma as an energy hog by stating a reasonable power draw instead of maximum draw. It seems that some companies, like Emotiva, don't care. My Emotiva amp has a 3300 watt power supply and the power rating listed on the back of the unit is 3500 watts. Those numbers jive with the power supply inside and the power it delivers after dumping 40% of it out as heat. It will NEVER see that on a dedicated single 20 amp circuit. Denon could be using the power it draws when volume is set to reference levels instead of 100% too. That is one part of the equation us A/V serfs are missing.
Denon AVR X7200WA, Emotiva XPR-5, Emotiva XPA-7, Sony XBR 75" 850C, Oppo UDP-203, Roku Ultra.
DefTech BP7000SC (L/R), CLR3000 (C), SM55 (FH), UIW BPZ/A (SB), UIW 75 (TM).
JBL L7 (Sur), EoSone RSR 350 (RH).
PC 2.1 setup. Emotiva Stealth 6, SVS SB16-Ultra sub, Emotiva DC-1 DAC.