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post #26191 of 26212 Old 05-25-2017, 02:51 PM
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Originally Posted by ebdixson View Post
Are you leaning towards the 13's now versus the 16's?

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Are you liking your SB16s and do they still seem adequate in your space?
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post #26192 of 26212 Old 05-25-2017, 03:24 PM
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Hi all,

I'm new here. I've bought SB16 Ultra few week ago and pretty happy with it. However, I just realized it has humming noise, it sounds like the white noise from TV or radio. It makes me feel like there's a fan running inside the sub constantly. I've contacted SVS customer service and they were very helpful, after few emails, they decided to send me a new amp to try out. However the new amp does the same thing. I've tested the sub when it only plugged into outlet.

My question is: is there any level of humming sound acceptable for sub? or it's by design?

Thanks
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post #26193 of 26212 Old 05-25-2017, 03:49 PM
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Quote:
Originally Posted by mleee View Post
Hi all,

I'm new here. I've bought SB16 Ultra few week ago and pretty happy with it. However, I just realized it has humming noise, it sounds like the white noise from TV or radio. It makes me feel like there's a fan running inside the sub constantly. I've contacted SVS customer service and they were very helpful, after few emails, they decided to send me a new amp to try out. However the new amp does the same thing. I've tested the sub when it only plugged into outlet.

My question is: is there any level of humming sound acceptable for sub? or it's by design?

Thanks
Do you have any "Three Pronged" plugged in fans etc or over head fans, light dimmers etc running on the same circuit breaker as the amp?

Can you move the sub ( I know HEAVY) and plug it into the wall on a different circuit?

I ran into this problem with a "Ground Loop" hum with my Hafler Pro Amp for my R2R and TT. I went crazy unplugging devices etc and finally found a

a old power strip with a 3 prong plug fan for my AVR. I used a 3 into 2 plug adaptor and all is well again.

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post #26194 of 26212 Old 05-25-2017, 04:09 PM
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Originally Posted by B T C View Post
Are you liking your SB16s and do they still seem adequate in your space?
I've had them for about 7 or 8 months now and I've honestly had zero regrets or urges to upgrade to something else.

I don't really push them that much and even being in relatively big space, there is still a great deal of additional output I could tap into if I wanted to. For me and my room they more than meet what I'm looking for with both music and movies.

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post #26195 of 26212 Old 05-25-2017, 04:18 PM
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Originally Posted by mleee View Post
Hi all,

I'm new here. I've bought SB16 Ultra few week ago and pretty happy with it. However, I just realized it has humming noise, it sounds like the white noise from TV or radio. It makes me feel like there's a fan running inside the sub constantly. I've contacted SVS customer service and they were very helpful, after few emails, they decided to send me a new amp to try out. However the new amp does the same thing. I've tested the sub when it only plugged into outlet.

My question is: is there any level of humming sound acceptable for sub? or it's by design?

Thanks
A hum is not white noise. Big difference caused by different things.

Unplug your sub from everything. Just plug in the power cord. What do you hear?
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Last edited by Mongo171; 05-25-2017 at 05:05 PM.
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post #26196 of 26212 Old 05-25-2017, 04:49 PM
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Quote:
Originally Posted by mleee View Post
Hi all,

I'm new here. I've bought SB16 Ultra few week ago and pretty happy with it. However, I just realized it has humming noise, it sounds like the white noise from TV or radio. It makes me feel like there's a fan running inside the sub constantly. I've contacted SVS customer service and they were very helpful, after few emails, they decided to send me a new amp to try out. However the new amp does the same thing. I've tested the sub when it only plugged into outlet.

My question is: is there any level of humming sound acceptable for sub? or it's by design?

Thanks
My PB16 has a slight hum.. But I need to sit almost next to my sub to hear it so it has never bothered me.. I only noticed it because a few people did experience the same as you... but my PB13s are dead silent..
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post #26197 of 26212 Old Yesterday, 08:14 AM
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Some sort of founding issue with a wire perhaps?
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post #26198 of 26212 Old Yesterday, 08:40 AM
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Originally Posted by januza View Post
My PB16 has a slight hum.. But I need to sit almost next to my sub to hear it so it has never bothered me.. I only noticed it because a few people did experience the same as you... but my PB13s are dead silent..
Is it an actual hum or a hiss? Both of my SB13Us have a faint hiss, need to be about 8" or closer to hear it, but it is normal. If it is a hum, are you hearing it form the driver, is it possibly the amp?

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post #26199 of 26212 Old Yesterday, 09:29 AM
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Originally Posted by Louis Bartay View Post
Do you have any "Three Pronged" plugged in fans etc or over head fans, light dimmers etc running on the same circuit breaker as the amp?

Can you move the sub ( I know HEAVY) and plug it into the wall on a different circuit?

I ran into this problem with a "Ground Loop" hum with my Hafler Pro Amp for my R2R and TT. I went crazy unplugging devices etc and finally found a

a old power strip with a 3 prong plug fan for my AVR. I used a 3 into 2 plug adaptor and all is well again.
The sub has three pronged plug, I've tried different outlet in my house already, the issue is still there. I also tried cheater plug (3 to 2 plug) as well, no luck at all.
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post #26200 of 26212 Old Yesterday, 09:32 AM
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Originally Posted by Mongo171 View Post
A hum is not white noise. Big difference caused by different things.

Unplug your sub from everything. Just plug in the power cord. What do you hear?
It's hard to explain because this is the first time I have this issue. When I unplug everything but the power, I hear the "hum" noise. the strength of the noise is constant, no matter what I turn volume all the way up or all the way down.
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post #26201 of 26212 Old Yesterday, 09:36 AM
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Originally Posted by januza View Post
My PB16 has a slight hum.. But I need to sit almost next to my sub to hear it so it has never bothered me.. I only noticed it because a few people did experience the same as you... but my PB13s are dead silent..
It's hard too hear in most cases, however, in quite scene, I can hear it from my listening position (about 9 feet from the sub). Mine also has a thump when it comes out from standby mode, which I think it pretty normal.

This is my first SVS sub so I'm pretty anxious about it. I mean, I would expect more from $2k sub than the humming noise.
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post #26202 of 26212 Old Yesterday, 10:08 AM
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Originally Posted by mleee View Post
It's hard to explain because this is the first time I have this issue. When I unplug everything but the power, I hear the "hum" noise. the strength of the noise is constant, no matter what I turn volume all the way up or all the way down.
Hums will be florescent lights, light dimmers, ground loop, electrical panel nearby. It's a process of elimination. I had a hiss when I got a new Blu-ray player. Turned out to be my pre-pro. Took it out of the loop and I have silence.
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post #26203 of 26212 Old Yesterday, 10:11 AM
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Originally Posted by mleee View Post
It's hard too hear in most cases, however, in quite scene, I can hear it from my listening position (about 9 feet from the sub). Mine also has a thump when it comes out from standby mode, which I think it pretty normal.

This is my first SVS sub so I'm pretty anxious about it. I mean, I would expect more from $2k sub than the humming noise.
It would still hum with a 10K sub. It might be the sub, but call SVS and they will be more than helpful to you to troubleshoot this. Remember, no matter how much something costs, there is an accecptable amount of failure. NOTHING is 100% perfect.

Just be open to accepting help. SVS is known for that. Give them a call.
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post #26204 of 26212 Old Yesterday, 10:30 AM
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It would still hum with a 10K sub. It might be the sub, but call SVS and they will be more than helpful to you to troubleshoot this. Remember, no matter how much something costs, there is an accecptable amount of failure. NOTHING is 100% perfect.

Just be open to accepting help. SVS is known for that. Give them a call.
Yes, I understand that, every electrical equipment has some kind of "noise" and it's ok to have that. That's why my first question is about acceptable level for humming noise from the sub since it's my first sub.

Actually, SVS customer server was very helpful and they sent me a new amp to try out and I have been contacting them try to resolve the issue. I put my question here just to get answers from "the wisdom of Crowds".
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post #26205 of 26212 Old Yesterday, 10:55 AM
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Originally Posted by mleee View Post
The sub has three pronged plug, I've tried different outlet in my house already, the issue is still there. I also tried cheater plug (3 to 2 plug) as well, no luck at all.
Did you turn OFF all ceiling fans, fluorescent lights, dimmer switches, alarms with motion detectors etc and unplug ALL three prong devices except the AVR and sub and try it?

You might have a poor/loose connection to the ground rod from outside to the electric meter, that is a earth ground for the breaker box.

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post #26206 of 26212 Old Yesterday, 11:30 AM
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I believe that Ed has said in the past that the new Ultra's have a higher gain structure than the old ones. One of my PB16's has a slight hum, which I believe is due to distance. I used a 50' RCA connection that winds around the room under baseboards. A PB13 in that same position didn't hum, and the two PB16's on shorter cables don't hum. If it bothered me, I could use a different (XLR) connection or even try replacing the amp, but it's a fairly soft hum so I haven't bothered.

Regards,
Mike
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post #26207 of 26212 Old Yesterday, 12:00 PM
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Originally Posted by mleee View Post
It's hard too hear in most cases, however, in quite scene, I can hear it from my listening position (about 9 feet from the sub). Mine also has a thump when it comes out from standby mode, which I think it pretty normal.

This is my first SVS sub so I'm pretty anxious about it. I mean, I would expect more from $2k sub than the humming noise.
Hearing it from 9' is NOT normal. Of my two subs, one at 7' one at 9' feet, they are dead silent unless being fed source material. They have a hiss that is normal. but this requires essentially sticking my ears on the dang things (8 inches or closer), and it's faint. Folks do get thumps in subs and speakers, I do not. Neither of mine thump coming out of standby, dead quiet from the drivers. Don't know if this is a RCA vs. XLR thing or not, mine are connected via XLR, which could very well play into a true 60Hz HUM issue, don't know if it could affect thumping?

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Originally Posted by mthomas47 View Post
I believe that Ed has said in the past that the new Ultra's have a higher gain structure than the old ones. One of my PB16's has a slight hum, which I believe is due to distance. I used a 50' RCA connection that winds around the room under baseboards. A PB13 in that same position didn't hum, and the two PB16's on shorter cables don't hum. If it bothered me, I could use a different (XLR) connection or even try replacing the amp, but it's a fairly soft hum so I haven't bothered.

Regards,
Mike
I don't have XLR output from my AVR so I can't try that. The subs is pretty near the AVR (cable is SVS 2m length ~ 6 feet). I'm in mood to accept that hum and focus more on sound quality until I find it bothers me too much.
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Hearing it from 9' is NOT normal. Of my two subs, one at 7' one at 9' feet, they are dead silent unless being fed source material. They have a hiss that is normal. but this requires essentially sticking my ears on the dang things (8 inches or closer), and it's faint. Folks do get thumps in subs and speakers, I do not. Neither of mine thump coming out of standby, dead quiet from the drivers. Don't know if this is a RCA vs. XLR thing or not, mine are connected via XLR, which could very well play into a true 60Hz HUM issue, don't know if it could affect thumping?
Maybe I overstated it however last night when kids already went to bed and the night was quiet, the hum was noticeable from my listening position. And it does the same thing alone when no cables connected to it. So it's probably not ground loop issue.
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Maybe I overstated it however last night when kids already went to bed and the night was quiet, the hum was noticeable from my listening position. And it does the same thing alone when no cables connected to it. So it's probably not ground loop issue.
Perhaps try running an extension cord to a different outlet/circuit in the house and test again - or haul it next door if you are friendly with the neighbor and see if it still hums while connected to power in their home?
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post #26211 of 26212 Old Yesterday, 04:36 PM
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Maybe I overstated it however last night when kids already went to bed and the night was quiet, the hum was noticeable from my listening position. And it does the same thing alone when no cables connected to it. So it's probably not ground loop issue.
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Originally Posted by MN_Moody View Post
Perhaps try running an extension cord to a different outlet/circuit in the house and test again - or haul it next door if you are friendly with the neighbor and see if it still hums while connected to power in their home?
It could still be a ground loop issue, try what MN recommends if you can. Ground loop issues can be REALLY odd in their behavior - there is always an explanation, but they don't always make sense at first. But a hum isn't necessarily a ground loop hum - get close to it; is it emanating from the driver? Or the amp? If it's NOT from the driver, it's not a 60HZ ground loop hum, it's somewhere else in the hardware.

OF COURSE - consult with SVS too......and don't get yourself into the mood to accept it until it bothers you - it already bothers or you probably wouldn't be bringing it up here - so KILL it now, before you simply accept it and don't actually do anything about it! You spent good money, let's make sure you are happy with the experience.

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Originally Posted by mleee View Post
Maybe I overstated it however last night when kids already went to bed and the night was quiet, the hum was noticeable from my listening position. And it does the same thing alone when no cables connected to it. So it's probably not ground loop issue.

Swap out the sub cable with a high quality one and see if that stops the hum noise you're hearing.

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