bootman
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Typing useless posts on internet forums....
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Post by bootman on Sept 10, 2013 17:48:33 GMT -5
Try a cheater plug on the umc yet?
BTW this isn't a tech support site, but we can try to help.
What gear did your buddy have that you used?
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stiehl11
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Post by stiehl11 on Sept 10, 2013 19:53:01 GMT -5
Well, with what you've listed you've tried (including Lonnie's suggestions) it sounds like the "hum" (which is a ground issue) is coming from your UMC. Do you have a line filter of any type for the UMC-1? Klipsch tend to be very sensitive speakers and any ground loop or dirty power from the power line can give you that hum. It's also quite possible that something has come loose within the chassis of the UMC-1 either while at its previous owner or during shipment from said earlier owner to you (not necessarily the equipment's fault; the service used to transport said beastie may have used it to play Smear the... er, Rugby while en-route to you). Did your buddy bring different speakes/speaker cables? Or just a different pre/pro?
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Post by robbie on Sept 10, 2013 20:16:08 GMT -5
Well, with what you've listed you've tried (including Lonnie's suggestions) it sounds like the "hum" (which is a ground issue) is coming from your UMC. Do you have a line filter of any type for the UMC-1? Klipsch tend to be very sensitive speakers and any ground loop or dirty power from the power line can give you that hum. It's also quite possible that something has come loose within the chassis of the UMC-1 either while at its previous owner or during shipment from said earlier owner to you (not necessarily the equipment's fault; the service used to transport said beastie may have used it to play Smear the... er, Rugby while en-route to you). Did your buddy bring different speakes/speaker cables? Or just a different pre/pro? Thanks for your replies. it was a local purchase so no shipment. I did not mention that the UPA did have to go back once as the center channel amp quit working. The previous owner also told me that this was his fourth UMC-1 in a year. My buddies equipment that I used was an older Sherwood Newcastle 5 channel amp with an Outlaw 975 with my speakers as well as another friends Onkyo gear. I am at a loss. Only line filter we have tried was the different power conditioners we have tried . Thanks for your input! |
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stiehl11
Emo VIPs
Give me available light!
Posts: 7,261
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Post by stiehl11 on Sept 10, 2013 20:26:00 GMT -5
Well, with what you've listed you've tried (including Lonnie's suggestions) it sounds like the "hum" (which is a ground issue) is coming from your UMC. Do you have a line filter of any type for the UMC-1? Klipsch tend to be very sensitive speakers and any ground loop or dirty power from the power line can give you that hum. It's also quite possible that something has come loose within the chassis of the UMC-1 either while at its previous owner or during shipment from said earlier owner to you (not necessarily the equipment's fault; the service used to transport said beastie may have used it to play Smear the... er, Rugby while en-route to you). Did your buddy bring different speakes/speaker cables? Or just a different pre/pro? Thanks for your replies. it was a local purchase so no shipment. I did not mention that the UPA did have to go back once as the center channel amp quit working. The previous owner also told me that this was his fourth UMC-1 in a year. My buddies equipment that I used was an older Sherwood Newcastle 5 channel amp with an Outlaw 975 with my speakers as well as another friends Onkyo gear. I am at a loss. Only line filter we have tried was the different power conditioners we have tried . Thanks for your input! with a return rate of 4 in a year, either the previous owner has the worst luck (do not stand next to him in a rain storm on a golf course) or something in his environment was ruining his gear (might have already been on a golf course in a rain storm). It's possible that you got #4 just before he was going to have to go with #5. Get an RMA from Emotiva and send that beastie in. They'll take good care of you. By way of comparison; I'm on #1 since May 2010. YMMV |
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Deleted
Deleted Member
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Post by Deleted on Sept 10, 2013 21:34:46 GMT -5
do you have any cable tv connected I was getting a terrible hum from only my front two channels connected to my xpr-2 the other five were fine connected to an mps-2 but I disconnected the cable and the hum disappeared I now have it connected to my power center for filtering hum is gone
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Post by robbie on Sept 10, 2013 21:37:46 GMT -5
do you have any cable tv connected I was getting a terrible hum from only my front two channels connected to my xpr-2 the other five were fine connected to an mps-2 but I disconnected the cable and the hum disappeared I now have it connected to my power center for filtering hum is gone Yes and that was addressed. With every cable disconnected except the rcas there is still noise. |
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Post by meldhache on Sept 10, 2013 22:23:16 GMT -5
Sounds like a flaky Umc-1, have you tried reflashing the firmware but seems to be a mechanical/ electrical internal problem.
Mel
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Post by wizardofoz on Sept 10, 2013 22:30:13 GMT -5
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Post by Cory Cooper on Sept 10, 2013 22:34:23 GMT -5
Have you tried a form of a star ground system? Similar to what you explained at the end of your initial post, but using a ground terminal/screw on your power conditioner. Does your power conditioner have a grounding terminal/screw?
If so, connect a wire from a chassis screw on the side of the UMC-1 to the power conditioner ground terminal/screw. Do the same for the XPA-5, a wire from a chassis screw on the side to the power conditioner ground terminal/screw.
I had to do this when I switched from a Denon AVR to the UMC-1/XPA-5 combo. System is dead silent now.
C
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Post by wizardofoz on Sept 10, 2013 22:57:42 GMT -5
the XPA-5 has no ground pins in the IEC connector so there is no ground per se on the chassis connections, so doing as Cory suggests might indeed help. I would have to check the UMC-1, there maybe a ground in the connector but it might not be connected internally. you could also try to connect the UMC chassis to the XPA-5 chassis directly you could also measure the potential (voltage difference) between the chassis of each to the power conditioner ground. check both for AC and DC just to be sure. if you have some voltage there is could be the issue. from the looks of this image there might be a ground in the XMC-1...but there are several incarnations of the UMC-1 too so its hard to say for sure.  |
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Post by robbie on Sept 11, 2013 0:48:44 GMT -5
the XPA-5 has no ground pins in the IEC connector so there is no ground per se on the chassis connections, so doing as Cory suggests might indeed help. I would have to check the UMC-1, there maybe a ground in the connector but it might not be connected internally. you could also try to connect the UMC chassis to the XPA-5 chassis directly you could also measure the potential (voltage difference) between the chassis of each to the power conditioner ground. check both for AC and DC just to be sure. if you have some voltage there is could be the issue. from the looks of this image there might be a ground in the XMC-1...but there are several incarnations of the UMC-1 too so its hard to say for sure. Ill give the ribbon thing a try tomorrow. Thanks for the info. I did try connecting both chassis with no luck.Ill let you know tomorrow. |
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Post by robbie on Sept 11, 2013 11:29:43 GMT -5
Have you tried a form of a star ground system? Similar to what you explained at the end of your initial post, but using a ground terminal/screw on your power conditioner. Does your power conditioner have a grounding terminal/screw? If so, connect a wire from a chassis screw on the side of the UMC-1 to the power conditioner ground terminal/screw. Do the same for the XPA-5, a wire from a chassis screw on the side to the power conditioner ground terminal/screw. I had to do this when I switched from a Denon AVR to the UMC-1/XPA-5 combo. System is dead silent now. C I tried that 2 different times with the same result both times. |
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Post by robbie on Sept 11, 2013 11:33:31 GMT -5
the XPA-5 has no ground pins in the IEC connector so there is no ground per se on the chassis connections, so doing as Cory suggests might indeed help. I would have to check the UMC-1, there maybe a ground in the connector but it might not be connected internally. you could also try to connect the UMC chassis to the XPA-5 chassis directly you could also measure the potential (voltage difference) between the chassis of each to the power conditioner ground. check both for AC and DC just to be sure. if you have some voltage there is could be the issue. from the looks of this image there might be a ground in the XMC-1...but there are several incarnations of the UMC-1 too so its hard to say for sure. Ill give the ribbon thing a try tomorrow. Thanks for the info. I did try connecting both chassis with no luck.Ill let you know tomorrow. There is a ground pin on the umc-1. I have tried every suggestion under the sun. Still waiting on an email from Lonnie for 2 days now. Thanks for your time. |
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Post by robbie on Sept 11, 2013 12:03:47 GMT -5
Try a cheater plug on the umc yet? BTW this isn't a tech support site, but we can try to help. What gear did your buddy have that you used? Yes I tried a cheater plug. |
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