Yamaha amp power

Skylover4life · 14-02-2014, 16:33

Hi there.

Sorry for the blonde question but I have the Yamaha HTR-2064, I love it, however I was wondering, if the sound output is 1000w how can the amp use a maximum of 250W that it says in the user guide?

I do apologise in advance if this is a silly question, but wouldn't wanna use it a lot if it is using 1000w, that's almost a cheap heater.

Thank you.

chrisjr · 14-02-2014, 16:40

Quote:

Originally Posted by Skylover4life

Hi there.

Sorry for the blonde question but I have the Yamaha HTR-2064, I love it, however I was wondering, if the sound output is 1000w how can the amp use a maximum of 250W that it says in the user guide?

I do apologise in advance if this is a silly question, but wouldn't wanna use it a lot if it is using 1000w, that's almost a cheap heater.

Thank you.

Because like just about every manufacturer they lie.

What they do is run one channel only to maximum output and quote that power rating. Then they multiply that by the number of channels in the amplifier.

So in a surround sound amp one channel on it's own could produce 200W multiply that by the five channels in the amp and you get the 1000W quoted in the specs.

But then they go and fit a 250W power supply. So unless they have found a way to overcome some pretty fundamental laws of physics there is in fact no way in this particular universe that the amp can produce 1000W out of the speakers.

It's a con trick as they think that people are seduced by big numbers. So saying the amp is 1000W is more impressive (so they think) then the reality which is the amp probably tops out at under 200W with all channels driven.

And in real life the amp is probably only pushing single figure wattages into the speakers anyway. You would be amazed at just how little power the amp is producing at normal listening levels.

Skylover4life · 14-02-2014, 17:02

So 250w would be if it was on full power, so would be much less just for watching TV at normal volume? Thank you

chrisjr · 14-02-2014, 17:23

Quote:

Originally Posted by Skylover4life

So 250w would be if it was on full power, so would be much less just for watching TV at normal volume? Thank you

Very much less. Though not all the power it sucks out of the mains ends up in the speakers. Some will power the electronics in the amp and some will go towards reducing your heating bill

But if you keep the volume below the level at which the neighbours come round with baseball bats in hand your telly could well be drawing more power than the amp!

fmradiotuner1 · 14-02-2014, 17:28

Best way to see powerful they are is by wight and the size of the transformer in side and how big the Caps are I have a NAD 370 and it looks to have 4

Nigel Goodwin · 14-02-2014, 17:47

Decent HiFi and PA gear give proper RMS power ratings - in-car and surround sound system mostly use highly imaginary ones.

If the maximum power consumption of your amp is only 250W, then the total output power (all channels added together) will be under 200W.

But 200W is a LOT of power, you wouldn't want to run it that loud in a normal house - and the amp will only take what it needs to provide the output you're using, but will never take more than 250W.

14-02-2014, 16:33	#1
Skylover4life Forum Member Join Date: Mar 2008 Location: Newcastle Posts: 1,225	Yamaha amp power Hi there. Sorry for the blonde question but I have the Yamaha HTR-2064, I love it, however I was wondering, if the sound output is 1000w how can the amp use a maximum of 250W that it says in the user guide? I do apologise in advance if this is a silly question, but wouldn't wanna use it a lot if it is using 1000w, that's almost a cheap heater. Thank you.

14-02-2014, 16:40	#2
chrisjr Forum Member Join Date: May 2004 Location: Reading Posts: 27,916	Quote: Originally Posted by Skylover4life Hi there. Sorry for the blonde question but I have the Yamaha HTR-2064, I love it, however I was wondering, if the sound output is 1000w how can the amp use a maximum of 250W that it says in the user guide? I do apologise in advance if this is a silly question, but wouldn't wanna use it a lot if it is using 1000w, that's almost a cheap heater. Thank you. Because like just about every manufacturer they lie. What they do is run one channel only to maximum output and quote that power rating. Then they multiply that by the number of channels in the amplifier. So in a surround sound amp one channel on it's own could produce 200W multiply that by the five channels in the amp and you get the 1000W quoted in the specs. But then they go and fit a 250W power supply. So unless they have found a way to overcome some pretty fundamental laws of physics there is in fact no way in this particular universe that the amp can produce 1000W out of the speakers. It's a con trick as they think that people are seduced by big numbers. So saying the amp is 1000W is more impressive (so they think) then the reality which is the amp probably tops out at under 200W with all channels driven. And in real life the amp is probably only pushing single figure wattages into the speakers anyway. You would be amazed at just how little power the amp is producing at normal listening levels.

14-02-2014, 17:02	#3
Skylover4life Forum Member Join Date: Mar 2008 Location: Newcastle Posts: 1,225	So 250w would be if it was on full power, so would be much less just for watching TV at normal volume? Thank you

14-02-2014, 17:23	#4
chrisjr Forum Member Join Date: May 2004 Location: Reading Posts: 27,916	Quote: Originally Posted by Skylover4life So 250w would be if it was on full power, so would be much less just for watching TV at normal volume? Thank you Very much less. Though not all the power it sucks out of the mains ends up in the speakers. Some will power the electronics in the amp and some will go towards reducing your heating bill But if you keep the volume below the level at which the neighbours come round with baseball bats in hand your telly could well be drawing more power than the amp!

14-02-2014, 17:28	#5
fmradiotuner1 Forum Member Join Date: Mar 2008 Location: TheEssexSunshineCoast Clacton Posts: 15,220	Best way to see powerful they are is by wight and the size of the transformer in side and how big the Caps are I have a NAD 370 and it looks to have 4

14-02-2014, 17:47	#6
Nigel Goodwin Forum Member Join Date: Apr 2006 Location: North Derbyshire Posts: 41,789	Decent HiFi and PA gear give proper RMS power ratings - in-car and surround sound system mostly use highly imaginary ones. If the maximum power consumption of your amp is only 250W, then the total output power (all channels added together) will be under 200W. But 200W is a LOT of power, you wouldn't want to run it that loud in a normal house - and the amp will only take what it needs to provide the output you're using, but will never take more than 250W.

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Yamaha amp power