#### ajithlal

##### Member

Hi friends,

When we come across specs. of amps and av receivers of different brands, it is noticed that many of them shows same output (min rms power) but consumes different electric power. Is there any thumb rule for the min. rms can be obtained for a particular input power (wattage)

For example Yamaha RX-V 661 outputs 90 watts into 7 channels while it consume 380 watt electric power.

But Harman Kardon AVR354 take an input of 890 watts to output 75 watts into 7 channels.

(both drives all channels at 20Hz ?? 20kHz into 8 ohms)

What will be the reason for this much difference in power consumption?

Ajith lal

When we come across specs. of amps and av receivers of different brands, it is noticed that many of them shows same output (min rms power) but consumes different electric power. Is there any thumb rule for the min. rms can be obtained for a particular input power (wattage)

For example Yamaha RX-V 661 outputs 90 watts into 7 channels while it consume 380 watt electric power.

But Harman Kardon AVR354 take an input of 890 watts to output 75 watts into 7 channels.

(both drives all channels at 20Hz ?? 20kHz into 8 ohms)

What will be the reason for this much difference in power consumption?

Ajith lal

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