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Re: Power Consumption
bugbitten #141321 06/12/06 08:34 PM
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Hi,

Chatting the other day with Tom Cumberland, Axiom's electronics engineer, I quizzed him on this subject and he noted that the current draw of the EP500 would typically be between 0.5A and 1.5 amperes depending on the playback level.

He said that 1 ampere would be a "safe prediction" at moderate listening levels.


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Power Consumption
alan #141322 06/12/06 09:11 PM
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Thanks for sharing this info Alan. I'm always curious about such things. Did Tom happen to tell you the power consumption when the EP500 is idle with no source? I have always wondered just how much it draws when not in use. I am told not much due to the dsp nature of the design, but again I am curious.


-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/
Re: Power Consumption
alan #141323 06/13/06 03:53 PM
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Quote:

Hi,

Chatting the other day with Tom Cumberland, Axiom's electronics engineer, I quizzed him on this subject and he noted that the current draw of the EP500 would typically be between 0.5A and 1.5 amperes depending on the playback level.

He said that 1 ampere would be a "safe prediction" at moderate listening levels.


thanks alan

Re: Power Consumption
dllewel #141324 06/13/06 03:54 PM
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Quote:

Thanks for sharing this info Alan. I'm always curious about such things. Did Tom happen to tell you the power consumption when the EP500 is idle with no source? I have always wondered just how much it draws when not in use. I am told not much due to the dsp nature of the design, but again I am curious.


from what i was told, the ep500 uses about as much energy as an alarm clock when not in use.

Re: Power Consumption
dllewel #141325 06/13/06 07:54 PM
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dllewel:

I did ask and he said "about as much as a night light," but didn't quote specific figures. . .

Regards,


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Power Consumption
alan #141326 06/13/06 08:22 PM
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And here I was worried what would happen if I forgot to turn it off at any given moment.

In other words what all of you are saying is that the sub will go dormant after the signal stops and will only consume the power of a night light...so I need not worry about losing my sub to non usage.


-------------------------------------
Denon 4308
M80x2,VP150,EP600,4xQS8
Re: Power Consumption
dllewel #141327 03/09/07 07:45 PM
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Quote:

Dllewel: Thanks for sharing this info Alan. I'm always curious about such things. Did Tom happen to tell you the power consumption when the EP500 is idle with no source? I have always wondered just how much it draws when not in use. I am told not much due to the dsp nature of the design, but again I am curious.

Quote:

Alan: I did ask and he said "about as much as a night light," but didn't quote specific figures. . .

Regards,







I've finally measured this for myself! I bought the P3 Kill-A-Watt device on Amazon and did some measurements of my EP500 (and many other things ).

What I was realy interested in was the subs power consumption when not in use. I measured the EP500 sitting idle and found it to be just 12 Watts. Now I don't feel too wasteful in leaving them on all of the time.

I decided to try some in use measurements. Here are some numbers while playing multichannel music (Beatles Love DVD) with the system (inlcuding sub) calibrated to 75dB with the receiver test noise);

Master volume at -30dB = 14 Watts
at -20dB = 32 Watts
at -15dB = 69 Watts
at -10dB = 121 Watts

These were the peak readings I observed while I replayed the same segment of audio (Track 14. Within You Without You). I also performed this test using only 1 of my 2 EP500s that I re-calibrated to 75dB before the measurements.

Having the volume at -10dB for music gets pretty loud but I know the EP500 could handle a lot more. Movies have LFE peaks that are probably 10 dB higher than this music mix.

So my next experiment was to try playing some loud LFE segments of a couple movies. But even with my reciever volume all the way up at 0dB, I really couldn't top the above numbers from the Beatles music test. The music readings seemed to be more consistant too. Overall, these wattage numbers were lower than I was expecting.

I am guessing this is because this device only updates its reading every 1 or 2 seconds, and the subs transient power peak may be too quick for me to really see. This device does great with a more steady draw. But it was a fun experiment none-the-less.


-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/
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