xpr-5

[zimmo]

I have amplifier xpr-5 ,is connected to 115v,how watts is make when is running.

[stiehl11]

How many amps are available to it? Amperes are what determine how much power the XPR series makes. Give it 20 amps and it will make the rated power.

[garbulky]

Sept 19, 2020 6:46:35 GMT -5 zimmo said:

I have amplifier xpr-5 ,is connected to 115v,how watts is make when is running.

It will provide all the power you need. The rating for XPR-5 is all channels driven. If you are running surround, the surround speakers will require less power than the front. So that means some of the unused power of the surrounds will be utilized to give you more power than its all channels rated on the fronts.

[zimmo]

thank for answer but when all chanels work whit 15 amps how watts ,normaly they xpr5 running whit 20 amps suppose 400 watts ,but when is running whit only 15 amps how watts they xpr5

work whit 5 chanels.

thank you

[davidl81]

Sept 20, 2020 7:25:25 GMT -5 zimmo said:

thank for answer but when all chanels work whit 15 amps how watts ,normaly they xpr5 running whit 20 amps suppose 400 watts ,but when is running whit only 15 amps how watts they xpr5

work whit 5 chanels.

thank you

So if you were ever able to get the amp to put out 400w in all 5 channels at the same time there would be a 2000W draw. On a 15A line you can pull about 1700W, so theoretically you could blow a 15A fuse, so that’s why Emotiva recommends a 20A. But in the real world there is no actual way to get your amp to pull 500W from each channel at the same time, and further more during those big power spikes you are using power stored in the capacitors, not from the wall power. The only way to actually need a 20A line would be if you were bench testing the amp. In a real world setting a dedicated 15A breaker is more than fine.

[garbulky]

To add to that... it may sound unbelievable but most of the time you are listening to about a watt or a little less of power. I’ve listened to large speakers in bigb rooms with an amp that puts out 7 watts of power.

[zimmo]

thank you

[405x5]

Sept 20, 2020 8:52:17 GMT -5 davidl81 said:

Sept 20, 2020 7:25:25 GMT -5 zimmo said:

thank for answer but when all chanels work whit 15 amps how watts ,normaly they xpr5 running whit 20 amps suppose 400 watts ,but when is running whit only 15 amps how watts they xpr5

work whit 5 chanels.

thank you

So if you were ever able to get the amp to put out 400w in all 5 channels at the same time there would be a 2000W draw. On a 15A line you can pull about 1700W, so theoretically you could blow a 15A fuse, so that’s why Emotiva recommends a 20A. But in the real world there is no actual way to get your amp to pull 500W from each channel at the same time, and further more during those big power spikes you are using power stored in the capacitors, not from the wall power. The only way to actually need a 20A line would be if you were bench testing the amp. In a real world setting a dedicated 15A breaker is more than fine.

I’ve been running my 405X5 on a 15 amp. forever without issue.
As you indicated, in real world listening I could hardly reach the threshold even if I tried.
Come to think of it, I’ve never experienced an audio amp. blowing a household breaker or fuse EVER!
Additionally, SMALL speaker settings on all channels also cuts down the power consumption and the SUB. is on a different circuit.

[leonski]

Don't forget the 20% DERATE for long term power draw. this should also not be an issue in home audio of any kind. Test Bench power might be another issue and in that case, the technician doing the work may even use a VARIAC to stabilize the line voltage near optimum.....

The derate means that a 15 amp circuit is really good for 12 amps for LONG time periods while a 20 is good for 16.

ONE other rthing. Lets just say, to keep the numbers easy....that we have a 500 watt amplifier. That's 500 watts OUTPUT. If the amplifier is an A/B amp, as many are, than at most you get maybe 50% efficiency. So the INPUT power to the amp would be roughly DOUBLE the output.

'D' amps are of course, another kettle of fish. But those huge efficiency numbers are typically output stage only, not plug to amp output. Also, the efficiency of such an amp FALLS as power output drops. So that at useful power outputs, the efficiency is far lower than the quoted full power value.

[zimmo]

thank you all for your answer.