Yamaha MSR 400

[iancl]

Looking into Yamaha MSR400's, and noticed in the specs, that really, they run at 225+75 = 300 W

They state that the power consumption of the amplifier is 110W though.

Does anyone know what this means? I was fairly certain that the speaker would be 300/400 (whichever) watts RMS, and I hope Yamaha haven't gone back to peak power ratings. So does that mean that the power consumption is a resting/standby/idle rating? If so, why wouldn't they quote a maximum power consumption?

[stantonsound]

The power consumption refers to how much electricity the amplifier requires to provide the sound output. If that is correct, 110Watts, that means that it requires about 1 amp of current to work.

1000watts= 1000 volts * amps (1kw=1kva)


110 watts
----------- = amps
120 volts


.916 amps

[iancl]

Yeah, yeah, I know what it means electrically (although in Aus we're at 240v), but how can it have a consumption of 110W and an output of 300W.

Either the output isn't in RMS, or the consumption is at idle.

Anyone know?

[stantonsound]

Sorry, didn't mean to insult you.

I run 5 QSC PLX amplifiers, a (2) 3402, (2) 3002, and a 1602. These power my Clair Brothers rig, and all amps are pushed hard and turned all the way up.

All together this is well more than 15,000 watts and I can power them all on a standard 20amp outlet. Although I usually split the amps on two circuits, it is no problem to have them on one circuit.

There is a correlation between the watts required and the output watts, but it is different for each manufacturer and model.

[iancl]

No worries, it was just the early hours or the morning getting to me. :-P

So you're saying that your speakers are putting out 15,000W, and consuming only 2,400W?

[audioslavematt]

A general rule of thumb is you'll be consuming about an eighth as much power as stated in the manual. Those power consumption numbers are derived from a pure sine wave signal driven to clip. Music is far from a pure sine wave and has its peaks. It's important to make sure there is enough power for those peaks, if only for a short period of time. As long as you're not running stupid levels, it's easy to run a system like Stantonsound's off a single 20 amp circuit.