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Re: Emotiva MPS-1 shutting down? Amp gurus help
SirQuack #162504 04/03/07 11:53 PM
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Quote:

How large are the toroids in the Outlaws spread across 5 or 7 channels? I know each amp on the mps-1 has its own 350VA Toroid or 2.45KVA total for 7 amps.




I'll have to find the size (I bet Gonk knows), but the 7500 and 7700 have the same 2 toroids. Must be big for the 7500 to weigh 80 lbs.

Re: Emotiva MPS-1 shutting down? Amp gurus help
Wid #162505 04/03/07 11:54 PM
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I think that's pretty similar to the MPS-1. The MPS-1 toroid looks like 600-700 VA and drives a single channel. The Rotel drives two channels.

Re: Emotiva MPS-1 shutting down? Amp gurus help
SirQuack #162506 04/04/07 12:00 AM
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Quote:

I know each amp on the mps-1 has its own 350VA
Toroid or 2.45KVA total for 7 amps.




Are you sure it's only 350VA? It looks a lot bigger than that. If so, how is it that they are doing 780W RMS? The toroid would burn like my quiche in grade 7 cooking class.

Re: Emotiva MPS-1 shutting down? Amp gurus help
Mojo #162507 04/04/07 12:40 AM
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350VA is correct for the MPS.

Re: Emotiva MPS-1 shutting down? Amp gurus help
SirQuack #162508 04/04/07 02:18 AM
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Randy, one of your questions involved possibly disabling the anti-clipping limiter circuit, but as Mojo also pointed out this circuit doesn't cause the amp to shut down, it just lowers the gain. The result is that at extreme levels a lower, more rounded wave top results instead of a clipped flat top. So, that circuit isn't guilty with respect to the shutting down.


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Re: Emotiva MPS-1 shutting down? Amp gurus help
JohnK #162509 04/04/07 02:39 AM
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Ok, John, Mojo, and whoever wants to provide input, here goes.

I dug out my old digital multimeter. About 15 years ago I took an electronics class through the NRI schools. About all I can remember is watts = volts x amps, if I recall correctly.

So, how about I hook up the multimeter between the speaker terminals on the amp, and the 12AWG wire going to my m80's. Then watch the current (amp) readings as I slowly turn up the volume while listening to music. If I make note of the reading at the time the amps shut down, could I not figure out the watts, and see if I truely am even close to 300 watts?

I just want to be in the ballpark, so when I call Emotiva I've got a little evidence, other than the Radio Shack SPL readings.

Thanks, Randy

Last edited by sirquack; 04/04/07 02:46 AM.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: Emotiva MPS-1 shutting down? Amp gurus help
SirQuack #162510 04/04/07 03:04 AM
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Yes, do it, but you'll be reading voltage(which is the boss), not current. Then the form of Ohm's Law which is applicable would be P=Vsquared/R.


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Enjoy the music, not the equipment.


Re: Emotiva MPS-1 shutting down? Amp gurus help
JohnK #162511 04/04/07 03:08 AM
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Ok, I'm confused, isn't it current that would be traveling through the speaker wires? And, voltage is what would be in the AC line?

Easy on me John.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: Emotiva MPS-1 shutting down? Amp gurus help
SirQuack #162512 04/04/07 03:15 AM
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Randy, the actual power is being carried by way of an electromagnetic wave traveling along the outside(not inside)of the speaker wire. Don't worry about current at this point; the standard way of measuring what you want to learn is by way of taking the voltage across the output terminals at varying levels.


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Enjoy the music, not the equipment.


Re: Emotiva MPS-1 shutting down? Amp gurus help
JohnK #162513 04/04/07 03:17 AM
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ok, I'm going to run down and give it a quick try...thanks a bunch


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


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