Of course not - it also has a lot of processing on board that's sucking power too.
A common claim is that these integrated amps have weak PSU's that can't feed all the amplifiers onboard. My reasoning is if these PSU's are weak and need another amp to off load some of the work you'll notice it starting to suck out near the max rated power supply when scenes in movies get loud/bassy. If it's no where near that it's safe to assume the onboard PSU can handle the power requirements of the amps.
If this is poor reasoning it'd be good to know why?
Thanks,
It is not rocket science but more complicated that that so called "common claim". Just a few quick points:
1) Power draw from the wall outlet represents the input power to your audio device, not the output.
2) The ratio of power input to output of your device various greatly depending on their design but mainly on their overall efficiencies (that is also affected by their different designs).
3) Power consumption specs are almost useless because different manufacturers provide different figures based on different standards and/or methodologies. Examples: under different freq response bandwidth, distortions, test duration (no such thing as continuous in a true sense), number of channels driven, average, peak, maximum etc.etc.etc....
4) Because of 3), you cannot tell the size of the power supply transformer based on the specified power consumption figure. That means it is quite possible that an amp with lower power consumption figure could have a larger power supply transformer and vice versa.
5) Even if you have the VA (volt-amp) rating of the transformer, a) the manufacturer may not be accurate about those figures (e.g. some might have provided inflated figures by mistake on their website but ignored them for whatever reasons, you can PM me for an example if you wish), b) transformers typically have excellent overload capability for short term demands, and such characteristics do vary among different design/build transformers.
6) Capacitors can store tremendous amount of energy for short demands, so you can't just look at the transformer VA specs without considering the capacitors used in the power supply.
7) Everything being equal, power supplies with better cooling (including the use of fans) will have better so called "continuous" power output rating.
8) Some amps may have relatively stronger power supplies, but they may have amp sections that are not as strong as others that have relatively weaker power supplies so again, you can't say one that has a stronger power supply is necessarily more powerful.
There are more, above are just examples. There are also the impact/effects from the nature of various music contents, that they are in complex waveform represented mathematically by an infinite series of sine waves of the fundamental frequency and harmonics such that one can argue all day about whether for a given manufacturer budget it is better to maximize 2,3 channel output vs all channel driven output, continuous average output vs the so called dynamic output etc.
Bottom line, don't draw conclusion by reading off the power consumption figure on the back panel. The VA rating of the PSU transformer, combined with the specs of the PSU capacitors probably give you a pretty good idea, all else being equal such as class AB vs class AB, not class D or G. In that case, make sure you get the reliable info, not just from commercials, not even those from the manufacturer websites.
