 Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Jan 2008
Posts: 175
veteran
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veteran
Joined: Jan 2008
Posts: 175 |
The graph has been posted multiple times and there's still folks that swear they drop down to 2 ohm but provide no proof. What else can be said.
Amen!! give us the 20hz and below impedance and be done with it
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Jun 2003
Posts: 6,833
axiomite
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axiomite
Joined: Jun 2003
Posts: 6,833 |
What other dedicated amps that you know of has had problems shutting down with the M80?
I have run the M80s with a Kenwood Basic M2A, Rotel RB 1070, Rotel RB 1080 and Luxman M117. None have shut down or even had a hiccup with the Axioms.
So that brings me back to believing the amp being the problem.
Rick
"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Jul 2006
Posts: 12,077 Likes: 7
Founder, Axiom Upgrade Club shareholder in the making
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Founder, Axiom Upgrade Club shareholder in the making
Joined: Jul 2006
Posts: 12,077 Likes: 7 |
And subwoofer frequency response graphs should go up to 22 kHz.
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Jun 2003
Posts: 6,833
axiomite
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axiomite
Joined: Jun 2003
Posts: 6,833 |
And subwoofer frequency response graphs should go up to 22 kHz. Good point seeing most crossover the M80s well above 20HZ.
Rick
"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
Chet, the Emotiva claim re the M80 impedance has always struck me as a rather nonsensical attempt to justify themselves. Regardless of whether the impedance around 10Hz would be about 2 ohms, that couldn't affect normal operation in the way that some have experienced. First, there's essentially no normal program material down there, and even if there was, the M80 would be so far down at that point(on the order of 30dB down)that the amount of power used would be very low. An impedance of that magnitude can't itself cause a problem; it's a combination of low impedance and high power that could cause a shutdown.
-----------------------------------
Enjoy the music, not the equipment.
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Dec 2006
Posts: 3,569
connoisseur
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connoisseur
Joined: Dec 2006
Posts: 3,569 |
Hey Fred, check it out the reviewer used Hiromi’s “Beyond Standard” SACD. http://www.hometheaterhifi.com/power-amplifiers/496.html?task=view&start=2Again, AFAIK no amp or even receiver other than the XPA-2 w/o the modified protection circuit is having this sort of systemic problem. So even if an impedance graph shows the M80 dipping to below 2 ohms under 20 Hz, and it even mattered as John pointed out, it would only show that what Emo is saying “that the XPA-2 can’t handle loads much below 4ohms with much power” is true. Also, Emotiva says not to use the XPA-2 bridged to drive anything below 8ohms which is why it sells the XPA-1 for $200 more to do the heavy lifting.
3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
Thanks for the heads up Dean. I had no idea it was released on sacd.
Fred
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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Dec 2006
Posts: 3,569
connoisseur
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connoisseur
Joined: Dec 2006
Posts: 3,569 |
Thanks for the heads up Dean. I had no idea it was released on sacd. It was in the first batch of multi-channel SACDs I bought when I got my first Oppo.
3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Jan 2008
Posts: 175
veteran
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veteran
Joined: Jan 2008
Posts: 175 |
Chet, the Emotiva claim re the M80 impedance has always struck me as a rather nonsensical attempt to justify themselves. Regardless of whether the impedance around 10Hz would be about 2 ohms, that couldn't affect normal operation in the way that some have experienced. First, there's essentially no normal program material down there, and even if there was, the M80 would be so far down at that point(on the order of 30dB down)that the amount of power used would be very low. An impedance of that magnitude can't itself cause a problem; it's a combination of low impedance and high power that could cause a shutdown. I know the whole situation is strange. That is why it would be great if Ian would silence this rumor. By confirming it or not. I love my axiom setup and am just curious because my xpa5 works great with them.
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Re: Anyone running M80s off an emotiva UPA-7?
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Joined: Dec 2006
Posts: 3,569
connoisseur
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connoisseur
Joined: Dec 2006
Posts: 3,569 |
I know the whole situation is strange. That is why it would be great if Ian would silence this rumor. By confirming it or not.
What difference would it make?
3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1
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