![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: Apr 2005
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connoisseur
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connoisseur
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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.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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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.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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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.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: Apr 2005
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connoisseur
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connoisseur
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350VA is correct for the MPS.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: May 2002
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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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Enjoy the music, not the equipment.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: Jan 2004
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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
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: May 2002
Posts: 10,654
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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.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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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. ![](/boards/images/graemlins/smile.gif)
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: May 2002
Posts: 10,654
shareholder in the making
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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.
-----------------------------------
Enjoy the music, not the equipment.
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![](/boards/images/icons/default/book.gif) Re: Emotiva MPS-1 shutting down? Amp gurus help
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Joined: Jan 2004
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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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