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Post by Percussionista on Jan 8, 2017 17:57:06 GMT -5
The new Airmotiv S12 I received has a low hum/buzz when it's on. Not really "distracting" but it's there. Just in case there was a DC issue I tried plugging it into an Emo CMX-2 but there was no change so it appears to be internal to the S12. I'm running unbalanced mono into the S12 from the new Oppo 203 since it doesn't have a balanced out, and I'm still waiting on the Emo MC700 (at which point I will run a balanced line from it to the sub). There is also a small turn-on thump, neither surprising nor annoying. And no I do not wish to return the S12 (oh my aching back  ). |
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Post by Jim on Jan 8, 2017 18:01:45 GMT -5
You should contact support to troubleshoot it, if you believe it's abnormal.
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Post by Axis on Jan 8, 2017 18:08:57 GMT -5
The new Airmotiv S12 I received has a low hum/buzz when it's on. Not really "distracting" but it's there. Just in case there was a DC issue I tried plugging it into an Emo CMX-2 but there was no change so it appears to be internal to the S12. I'm running unbalanced mono into the S12 from the new Oppo 203 since it doesn't have a balanced out, and I'm still waiting on the Emo MC700 (at which point I will run a balanced line from it to the sub). There is also a small turn-on thump, neither surprising nor annoying. And no I do not wish to return the S12 (oh my aching back ). There should not be even low hum/buzz. Is the subwoofer cable and the Oppo 203 something new or have you used a sub with that cable and Oppo 203 before with no hum ? |
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Post by Percussionista on Jan 8, 2017 18:19:42 GMT -5
The new Airmotiv S12 I received has a low hum/buzz when it's on.... There should not be even low hum/buzz. Is the subwoofer cable and the Oppo 203 something new or have you used a sub with that cable and Oppo 203 before with no hum ? The Oppo 203 and the S12 are both new. Prior to this I was running a passive subwoofer that was powered from two channels of a UPA-500, and supplying audio signal from a 15 year-old AVP from EAD (Laserdisc era). So before, EAD -> UPA500 -> passive SW. When I got the Oppo, just a few weeks back, I removed the EAD from the chain and used the rudimentary SSP within the Oppo. I'm pretty sure there was no hum at that time, going Oppo -> UPA500 -> passive SW. As far as the S12 is concerned, just turning it on with no signal in, gives the hum. Even with no cable in. So it's definitely within the S12. Don't know if it could be proximity to other stuff. |
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Post by Axis on Jan 8, 2017 18:26:35 GMT -5
There should not be even low hum/buzz. Is the subwoofer cable and the Oppo 203 something new or have you used a sub with that cable and Oppo 203 before with no hum ? The Oppo 203 and the S12 are both new. Prior to this I was running a passive subwoofer that was powered from two channels of a UPA-500, and supplying audio signal from a 15 year-old AVP from EAD (Laserdisc era). So before, EAD -> UPA500 -> passive SW. When I got the Oppo, just a few weeks back, I removed the EAD from the chain and used the rudimentary SSP within the Oppo. I'm pretty sure there was no hum at that time, going Oppo -> UPA500 -> passive SW. As far as the S12 is concerned, just turning it on with no signal in, gives the hum. Even with no cable in. So it's definitely within the S12. Don't know if it could be proximity to other stuff. If you have hum with no cable you may need to return. I doubt Emotiva is going to say normal and built in subwoofer amps are known to be bad. One of my new Airmotiv powered monitors hummed and it was a bad new power supply. They charged me for a new one and sent it with return shipping. Just hand the person that delivers the new one the bad one with prepaid shipping. |
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Post by Percussionista on Jan 8, 2017 18:27:32 GMT -5
The new Airmotiv S12 I received has a low hum/buzz when it's on.... There should not be even low hum/buzz. Is the subwoofer cable and the Oppo 203 something new or have you used a sub with that cable and Oppo 203 before with no hum ? The cable is one of the Emo X RCA cables. I've actually tried both a 6 and 3 footer, and both have been used before. In any case, the S12 hums with no input cable attached at all. |
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Post by brutiarti on Jan 8, 2017 18:27:46 GMT -5
Did you try a cheater plug?
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Post by Axis on Jan 8, 2017 18:29:22 GMT -5
There should not be even low hum/buzz. Is the subwoofer cable and the Oppo 203 something new or have you used a sub with that cable and Oppo 203 before with no hum ? The cable is one of the Emo X RCA cables. I've actually tried both a 6 and 3 footer, and both have been used before. In any case, the S12 hums with no input cable attached at all. Sounds like something internal on the Sub. |
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Post by Percussionista on Jan 8, 2017 18:35:53 GMT -5
Did you try a cheater plug? Haven't tried this, though I did plug the sub into a CMX-2. So... just tried it, still hums the same with a cheater plug. |
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Post by Casey Leedom on Jan 8, 2017 18:39:42 GMT -5
Yeah, if it hums with no input at all, then it's just the sub and you'll have to decide if it's a "quiet hum of happy anticipation of providing you with all the bass you could ever ask for" or a confused hum of getting pissed off and liable to bark at you at any time". It's likely to be either a mechanical vibration within the power supply or something noisy in the power supply circuit which is being pushed out the speaker. If you lightly touch the speaker, is it vibrating and does that damp the hum?
Casey
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Post by Percussionista on Jan 8, 2017 20:13:04 GMT -5
... It's likely to be either a mechanical vibration within the power supply or something noisy in the power supply circuit which is being pushed out the speaker. If you lightly touch the speaker, is it vibrating and does that damp the hum? As far as I can tell/feel, the speaker is not vibrating (tried both the bottom woof and its side companion). Our finger tips are very sensitive, but this sound is fairly low level. So, seems like the internals. Well, I guess I can call Emo Monday (assuming we have no power/flooding issues ) and see what they think. This won't be noticeable once actual audio is playing, but I wouldn't want this to be a harbinger of something worse. |
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Post by solidstate on Jan 8, 2017 20:35:21 GMT -5
Did you try a cheater plug? Good call! |
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Post by Dan Laufman on Jan 8, 2017 21:14:54 GMT -5
Hi all,
Greetings from Las Vegas!
I spoke to Rory late last Friday while I was at CES and he told me that he had noticed a slight hum when using the production S12 in the sound room where it is very quiet. He then compared the quiescent noise level of the production unit to the approved sample, and yes, it definitely has a very low level hum that is not there on the approved unit. It's not particularly loud, but according to Rory, once you hear it, you can't stop hearing it in a quiet room. I didn't know if the issue was "real" (as in stop the presses) or not, and I told him I'd look at it with Lonnie on Tuesday morning when we returned. Apparently, it is REAL!
So, we've got to address this right away. BTW, when the unit goes into standby, it goes away. According to Rory, it is NOT the transformer, but it appears to be a minor ground loop. My suspicion is that an innocent change to either lead dress, or maybe a small board change is causing this issue.
Whatever the cause, we'll get this sorted out and replace your unit ASAP.
In the interim, if you are otherwise pleased with your unit, hang on to it. We'll send a replacement ASAP, along with a call tag for the original unit once we get a fix worked out. This should happen very quickly.
We'll extend your 30 day trial period while this is sorted out and also send all affected S10/S12 owners a formal note on with a plan of action early next week.
My sincere apologies for this issue. And thank you in advance for your patience and understanding.
Sincerely,
Dan
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Post by solidstate on Jan 8, 2017 21:17:54 GMT -5
Dan and friends, you guys are such a CLASS ACT!
Can you imagine people the president of say Harman, whilst at a busy trade show, to come on a public forum and address a product/production issue directly with a customer like that!?!
Dan you have a customer for life here.
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Post by novisnick on Jan 8, 2017 21:43:26 GMT -5
Hi all, Greetings from Las Vegas! I spoke to Rory late last Friday while I was at CES and he told me that he had noticed a slight hum when using the production S12 in the sound room where it is very quiet. He then compared the quiescent noise level of the production unit to the approved sample, and yes, it definitely has a very low level hum that is not there on the approved unit. It's not particularly loud, but according to Rory, once you hear it, you can't stop hearing it in a quiet room. I didn't know if the issue was "real" (as in stop the presses) or not, and I told him I'd look at it with Lonnie on Tuesday morning when we returned. Apparently, it is REAL! So, we've got to address this right away. BTW, when the unit goes into standby, it goes away. According to Rory, it is NOT the transformer, but it appears to be a minor ground loop. My suspicion is that an innocent change to either lead dress, or maybe a small board change is causing this issue. Whatever the cause, we'll get this sorted out and replace your unit ASAP. In the interim, if you are otherwise pleased with your unit, hang on to it. We'll send a replacement ASAP, along with a call tag for the original unit once we get a fix worked out. This should happen very quickly. We'll extend your 30 day trial period while this is sorted out and also send all affected S10/S12 owners a formal note on with a plan of action early next week. My sincere apologies for this issue. And thank you in advance for your patience and understanding. Sincerely, Dan
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Post by brand on Jan 8, 2017 21:47:37 GMT -5
What an unexpected feel good thread!  |
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Post by garbulky on Jan 8, 2017 22:27:40 GMT -5
Yes! It's great when a manufacturer acknowledges an issue quickly and acts. Well done!
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Post by Percussionista on Jan 8, 2017 23:38:08 GMT -5
Wow, so cool Big Dan! I'll start doing exercises to strengthen my back for the bring down and up of the old and new woofs (yes, hauled this puppy up to the second floor in one go ). Oh - not sure if you are intending to send a new power board or an actual whole unit, but either way.... much appreciation for quickly getting to this. |
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Post by solidstate on Jan 9, 2017 8:07:38 GMT -5
Wow, so cool Big Dan! I'll start doing exercises to strengthen my back for the bring down and up of the old and new woofs (yes, hauled this puppy up to the second floor in one go ). Oh - not sure if you are intending to send a new power board or an actual whole unit, but either way.... much appreciation for quickly getting to this. They'll probably do a plate-amp cross ship replacement if you feel confident enough removing the current one and it has a bleeder resister to discharge the caps. Isn't that impressive Dan would take the time while at CES to address your reported hum issue! And that they would spot it in some production models in their CES room. I'm most certain Dan and friends will take care of you. |
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Post by pmctexas on Jan 9, 2017 13:23:02 GMT -5
This has been an issue with my S10 from day 1 along with turn on pop.. Info is on another thread in subwoofer section. These subs definitely have a problem... Sometimes it doesn't pay to be first to buy...
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