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#162444 - 03/29/07 02:41 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
KlipschGuy Offline
old hand

Registered: 03/23/07
Posts: 79
Loc: Waterloo, On
Hey all, Just got my M80s and all I can say for a very quick first impression is WOW! They sound fantastic, I can't believe the bass these things pound out, incredible. I was really surprised though how much those drivers move, LOL, they were just flying back and forth to Keb Mo, hehe.

Randy, I have the same problem with the MPS1, at about 105db from 12' away the Left channel shuts down at -20db on the DMC and the right at -15. I spoke to Dan Laufman who is the President of Emo and he has set his top engineer onto the problem, it will be corrected and we have nothing to worry about. He said that the MPS1 should make your ears bleed before shutting down, so there is a problem and we will be taken care of.

I have complete faith in these guys, hang in there!

Chris
_________________________
Emotiva DMC1, MPS-1 ,M80v2 ,Klipsch RC64,Mirage Omni260 surrounds,Paradigm PW2200 sub

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#162445 - 03/29/07 02:53 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
Lorenzo1000 Offline
aficionado

Registered: 02/07/04
Posts: 537
Loc: Winterpeg
After all these replies I think i't's time to pull out my Ratshack meter and do some checking. I'm running the 80's with my pioneer 84 receiver and 2 ATI 1502's each in mono mode. I'll have to see what level of DB's I can get them to produce. It's starting to sound more like Tharkun's problem he had with the outlaw 7 channel amp where it just wouldn't play nice with his 80s.


Edited by Lorenzo1000 (03/29/07 02:55 PM)
_________________________
2xM80 VP180 2xQS8 2xM3 HSU STF3 LG 60PS11 Denon 3808 ATI 1506 LCR 2xATI 1502 Oppo BDP-83

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#162446 - 03/29/07 10:21 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: KlipschGuy]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13318
Loc: Iowa
Thanks Klipsch Guy, , man you really need to change your name. I have spoken to Dan only via posts on AV123. I'm fairly certain Lonnie has spoken to Dan about the problem I am having. There is another guy on AV123 with Ref 1's, which are bookshelf but still 4 ohm design speakers. He is having the same issue with his Denon 2807. At first we thought it was the Denons.

Anyway, Lonnie was supposed to send me some replacement amps asap. I have not received them yet. I will follow up to see if he has spoken to Dan.

thanks for the info..
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#162447 - 03/29/07 10:55 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
Lorenzo1000 Offline
aficionado

Registered: 02/07/04
Posts: 537
Loc: Winterpeg
All right not that it proves anything but I got my Pioneer receiver running in pure direct with my ATI 1502 amps each in mono feeding my 80's. I turned the volume up to 0 on the scale and they were hitting peaks of around 108 decibels on the meter from about 14 feet away. Good grief that is LOUD!!! Who on god's green earth would ever play their speakers that loud for any length of time?

So Randy when you are having trouble are you only using your 80s or are you also using your other speakers and sub?
_________________________
2xM80 VP180 2xQS8 2xM3 HSU STF3 LG 60PS11 Denon 3808 ATI 1506 LCR 2xATI 1502 Oppo BDP-83

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#162448 - 03/29/07 11:00 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: Lorenzo1000]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13318
Loc: Iowa
During my testing, I was just playing music using Direct mode using my m80's and ep600 sub.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#162449 - 03/29/07 11:27 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13318
Loc: Iowa
Just an update from the President of Emotiva.


Don't worry guy's. We're looking into this and will advise in detail ASAP.

It is definitely not a lack of output capability; I have no concerns about this. My feeling is that the protect threshold had drifted on this production run for some reason.. . it's a subtle thing, as the modules test OK, but under the right dynamic conditions they are apparently inhibiting too easily. We'll get to the bottom of this right away.

Regards,
Dan
__________________
Dan Laufman
President
Emotiva Audio Coporation

_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#162450 - 03/29/07 11:32 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
Lorenzo1000 Offline
aficionado

Registered: 02/07/04
Posts: 537
Loc: Winterpeg
Have you seen the Dodge Nitro commercial where he gives a guy a boost and the nitro driver guy gives it some gas and the car literally explodes 50 feet straight up in the air? I can see it now, "Hey Randy turn it up a little" then BOOM and there goes the roof to Randy's house...

Nitro


Edited by Lorenzo1000 (03/29/07 11:36 PM)
_________________________
2xM80 VP180 2xQS8 2xM3 HSU STF3 LG 60PS11 Denon 3808 ATI 1506 LCR 2xATI 1502 Oppo BDP-83

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#162451 - 03/30/07 12:39 AM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 5279
Loc: Bowmanville, Ontario, Canada
>>My feeling is that the protect threshold had drifted on this production run for some reason..

This sounds right, since the amps weren't getting really hot.

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#162452 - 03/30/07 01:55 AM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: SirQuack]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10363
Yes, as Mr. Laufman suggested, this may be a case of the protective circuits for temperature and/or current being set too low. I recall that about four years ago there was quite a bit of internet discussion about Pioneer Elite receivers(generally quite capable with 4ohm loads)shutting down all over the place. It didn't appear to be fully explained, but the situation apparently was corrected by servicing the protective circuits on the units.
_________________________
-----------------------------------

Enjoy the music, not the equipment.



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#162453 - 03/31/07 08:32 PM Re: Emotiva MPS-1 shutting down? Amp gurus help [Re: JohnK]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13318
Loc: Iowa
I'm trying to use this SPL Calculator to get a better idea of how many watts I'm really using to achieve the SPL dB's I'm seeing when the Emotiva amps go into protective mode.

This calculator takes into account speaker placement in relationship to the walls, as well as if your using 1 or more speakers during the measurements.

The question I have is that it appears to be for an 8ohm speaker? So, how do I interpret the results when considering my m80's?

Based on what I'm figuring so far, there is no way I'm maxing out this amp?
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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