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tech / rec.audio.pro / Re: NHT Super One monitor distortion

SubjectAuthor
* NHT Super One monitor distortionTim Sprout
+- Re: NHT Super One monitor distortionpalli...@gmail.com
+* Re: NHT Super One monitor distortionDon Pearce
|`* Re: NHT Super One monitor distortionpalli...@gmail.com
| +* Re: NHT Super One monitor distortiongeoff
| |`* Re: NHT Super One monitor distortionpalli...@gmail.com
| | `* Re: NHT Super One monitor distortiongeoff
| |  `- Re: NHT Super One monitor distortionpalli...@gmail.com
| `* Re: NHT Super One monitor distortionDon Pearce
|  `- Re: NHT Super One monitor distortionpalli...@gmail.com
`- Re: NHT Super One monitor distortionScott Dorsey

1
NHT Super One monitor distortion

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From: timspr...@yahoo.com (Tim Sprout)
Newsgroups: rec.audio.pro
Subject: NHT Super One monitor distortion
Date: Sun, 17 Jul 2022 15:19:25 -0800
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 by: Tim Sprout - Sun, 17 Jul 2022 23:19 UTC

One of my NHT Super One near field monitors is distorting through the
range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
shelf onto my desk. There is no apparent damage to the speakers and I
only just noticed the distortion now. Could a loud volume spike have
fried the woofer? Any ideas how to troubleshoot and repair?

Any recommendations for a replacement set of passive monitors? I am
driving them with an Adcom GFA 535II amp. Are the NHT SuperOne 2.1's
comparable?

Thanks.

- Tim Sprout

Re: NHT Super One monitor distortion

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Subject: Re: NHT Super One monitor distortion
From: palliso...@gmail.com (palli...@gmail.com)
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 by: palli...@gmail.com - Mon, 18 Jul 2022 00:11 UTC

Tim Sprout wrote:
=================
> One of my NHT Super One near field monitors is distorting through the
> range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
> shelf onto my desk. There is no apparent damage to the speakers and I
> only just noticed the distortion now. Could a loud volume spike have
> fried the woofer? Any ideas how to troubleshoot and repair?
>

** Remove the woofer and take a look inside.
There may be a loose object in the box or caught in the back of the woofer.
Also check the feed wires are free to move and not touching the frame or each other.
I've seen one example where they touched under drive at a particular low frequency.

...... Phil

Re: NHT Super One monitor distortion

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From: spa...@spam.com (Don Pearce)
Newsgroups: rec.audio.pro
Subject: Re: NHT Super One monitor distortion
Date: Mon, 18 Jul 2022 07:23:13 GMT
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 by: Don Pearce - Mon, 18 Jul 2022 07:23 UTC

On Sun, 17 Jul 2022 15:19:25 -0800, Tim Sprout <timsprout@yahoo.com>
wrote:

>One of my NHT Super One near field monitors is distorting through the
>range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
>shelf onto my desk. There is no apparent damage to the speakers and I
>only just noticed the distortion now. Could a loud volume spike have
>fried the woofer? Any ideas how to troubleshoot and repair?
>
>Any recommendations for a replacement set of passive monitors? I am
>driving them with an Adcom GFA 535II amp. Are the NHT SuperOne 2.1's
>comparable?
>
>Thanks.
>
>- Tim Sprout

It is possible that as a result of the fall the coil is now rubbing
against the magnet. Push the coil gently in and out. Any grating sound
and that is the problem. The fix may be as simple as tapping the
magnet assembly with a soft mallet. You will have to remove the cone's
dust cover to see which side is touching.

d

--
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Re: NHT Super One monitor distortion

<tb4fll$ma5$1@panix2.panix.com>

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From: klu...@panix.com (Scott Dorsey)
Newsgroups: rec.audio.pro
Subject: Re: NHT Super One monitor distortion
Date: 18 Jul 2022 20:26:29 -0000
Organization: Former users of Netcom shell (1989-2000)
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 by: Scott Dorsey - Mon, 18 Jul 2022 20:26 UTC

Tim Sprout <timsprout@yahoo.com> wrote:
>One of my NHT Super One near field monitors is distorting through the
>range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
>shelf onto my desk. There is no apparent damage to the speakers and I
>only just noticed the distortion now. Could a loud volume spike have
>fried the woofer? Any ideas how to troubleshoot and repair?

Pull the woofer out and see. Is the magnet still firmly attached to the rear?
Does the cone move in and out evenly with pressure straight down from your
fingers or does it scrape? If you carefully cut open the dust cap (cut
around the outer edge so it can be reglued) you can see if there is damage
to the voice coil or if the voice coil has come off.

If the driver is damaged, send it to a speaker reconing place and have
them fix it. Speaker Factory in Gaithersburg, MD or the Circuit Shop in
Kentwood, MI both do good work on consumer drivers.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Re: NHT Super One monitor distortion

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Subject: Re: NHT Super One monitor distortion
From: palliso...@gmail.com (palli...@gmail.com)
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 by: palli...@gmail.com - Tue, 19 Jul 2022 05:23 UTC

Dope Pearce wrote:
=================
>
> >One of my NHT Super One near field monitors is distorting through the
> >range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
> >shelf onto my desk. There is no apparent damage to the speakers and I
> >only just noticed the distortion now. Could a loud volume spike have
> >fried the woofer? Any ideas how to troubleshoot and repair?
> >

> >
> >Thanks.
> >
> >- Tim Sprout
> It is possible that as a result of the fall the coil is now rubbing
> against the magnet.

** FFS - it only fell "12 inches ".

> Push the coil gently in and out. Any grating sound
> and that is the problem. The fix may be as simple as tapping the
> magnet assembly with a soft mallet.

** ROTFL !

.... Phil

Re: NHT Super One monitor distortion

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 by: geoff - Tue, 19 Jul 2022 10:03 UTC

On 19/07/2022 5:23 pm, palli...@gmail.com wrote:
> Dope Pearce wrote:
> =================
>>
>>> One of my NHT Super One near field monitors is distorting through the
>>> range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
>>> shelf onto my desk. There is no apparent damage to the speakers and I
>>> only just noticed the distortion now. Could a loud volume spike have
>>> fried the woofer? Any ideas how to troubleshoot and repair?
>>>
>
>>>
>>> Thanks.
>>>
>>> - Tim Sprout
>> It is possible that as a result of the fall the coil is now rubbing
>> against the magnet.
>
> ** FFS - it only fell "12 inches ".

Enough to do damage depending on what it landed on.

>
>
>> Push the coil gently in and out. Any grating sound
>> and that is the problem. The fix may be as simple as tapping the
>> magnet assembly with a soft mallet.
>
> ** ROTFL !

Yes for sure.

But more likely to be the pole-piece moved anyway.

geoff

Re: NHT Super One monitor distortion

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Subject: Re: NHT Super One monitor distortion
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 by: palli...@gmail.com - Tue, 19 Jul 2022 22:32 UTC

geoff wrote:
>> > Dope Pearce wrote:
> > =================
>
> >> It is possible that as a result of the fall the coil is now rubbing
> >> against the magnet.
> >
> > ** FFS - it only fell "12 inches ".

> Enough to do damage depending on what it landed on.

** That is total BS and we are told how it landed.


> >> Push the coil gently in and out. Any grating sound
> >> and that is the problem. The fix may be as simple as tapping the
> >> magnet assembly with a soft mallet.
> >
> > ** ROTFL !
>
> Yes for sure.

** Yawwnnnnnn....

> But more likely to be the pole-piece moved anyway.

** Very unlikely in fact.

The OP needs to DO what I posted.

...... Phil

Re: NHT Super One monitor distortion

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 by: geoff - Wed, 20 Jul 2022 00:20 UTC

On 20/07/2022 10:32 am, palli...@gmail.com wrote:
> geoff wrote:
>>>> Dope Pearce wrote:
>>> =================
>>
>>>> It is possible that as a result of the fall the coil is now rubbing
>>>> against the magnet.
>>>
>>> ** FFS - it only fell "12 inches ".
>
>> Enough to do damage depending on what it landed on.
>
> ** That is total BS and we are told how it landed.
>
>
>>>> Push the coil gently in and out. Any grating sound
>>>> and that is the problem. The fix may be as simple as tapping the
>>>> magnet assembly with a soft mallet.
>>>
>>> ** ROTFL !
>>
>> Yes for sure.
>
> ** Yawwnnnnnn....
>
>> But more likely to be the pole-piece moved anyway.
>
> ** Very unlikely in fact.

> The OP needs to DO what I posted.

Yes , do what you posted and if not that then what I suggested is the
next most likely possibility. Especially if a particularly solid desk.

Similar with dynamic mics. Actual experience with both types of gear.

Time to take yer meds again phalluson.

geoff

Re: NHT Super One monitor distortion

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Subject: Re: NHT Super One monitor distortion
From: palliso...@gmail.com (palli...@gmail.com)
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 by: palli...@gmail.com - Wed, 20 Jul 2022 00:33 UTC

geoff wrote:
==========
>>>>> Dope Pearce wrote:
> >>> =================
> >>
> >>>> It is possible that as a result of the fall the coil is now rubbing
> >>>> against the magnet.
> >>>
> >>> ** FFS - it only fell "12 inches ".
> >
> >> Enough to do damage depending on what it landed on.
> >
> > ** That is total BS and we are told how it landed.
> >
> >>>> Push the coil gently in and out. Any grating sound
> >>>> and that is the problem. The fix may be as simple as tapping the
> >>>> magnet assembly with a soft mallet.
> >>>
> >>> ** ROTFL !
> >>
> >> Yes for sure.
> >
> > ** Yawwnnnnnn....
> >
> >> But more likely to be the pole-piece moved anyway.
> >
> > ** Very unlikely in fact.
>
> > The OP needs to DO what I posted.
>
> Yes , do what you posted and if not that then what I suggested is the
> next most likely possibility. Especially if a particularly solid desk.

** Horse manure.
> Similar with dynamic mics.

** Complete bullshit.

...... Phil

Re: NHT Super One monitor distortion

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From: spa...@spam.com (Don Pearce)
Newsgroups: rec.audio.pro
Subject: Re: NHT Super One monitor distortion
Date: Wed, 20 Jul 2022 07:30:52 GMT
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 by: Don Pearce - Wed, 20 Jul 2022 07:30 UTC

On Mon, 18 Jul 2022 22:23:51 -0700 (PDT), "palli...@gmail.com"
<pallison49@gmail.com> wrote:

> Dope Pearce wrote:
>=================
>>
>> >One of my NHT Super One near field monitors is distorting through the
>> >range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
>> >shelf onto my desk. There is no apparent damage to the speakers and I
>> >only just noticed the distortion now. Could a loud volume spike have
>> >fried the woofer? Any ideas how to troubleshoot and repair?
>> >
>
>> >
>> >Thanks.
>> >
>> >- Tim Sprout
>> It is possible that as a result of the fall the coil is now rubbing
>> against the magnet.
>
>** FFS - it only fell "12 inches ".
>
>
>> Push the coil gently in and out. Any grating sound
>> and that is the problem. The fix may be as simple as tapping the
>> magnet assembly with a soft mallet.
>
>** ROTFL !
>
>
>... Phil

A 12 inch drop onto a solid surface is plenty enough to shift a
speaker magnet. A movement of less than 1mm is sufficient to cause the
symptoms described here.

d

--
This email has been checked for viruses by Avast antivirus software.
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Re: NHT Super One monitor distortion

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Subject: Re: NHT Super One monitor distortion
From: palliso...@gmail.com (palli...@gmail.com)
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 by: palli...@gmail.com - Wed, 20 Jul 2022 22:36 UTC

Dope Pearce wrote:
=================
>>
> >> >One of my NHT Super One near field monitors is distorting through the
> >> >range of 20 Hz - 1000 Hz. It fell about 12 inches recently off it's
> >> >shelf onto my desk. There is no apparent damage to the speakers and I
> >> >only just noticed the distortion now. Could a loud volume spike have
> >> >fried the woofer? Any ideas how to troubleshoot and repair?
> >> >
> >
> >> >
> >> >Thanks.
> >> >
> >> >- Tim Sprout
> >> It is possible that as a result of the fall the coil is now rubbing
> >> against the magnet.
> >
> >** FFS - it only fell "12 inches ".
> >
> >
> >> Push the coil gently in and out. Any grating sound
> >> and that is the problem. The fix may be as simple as tapping the
> >> magnet assembly with a soft mallet.
> >
> >** ROTFL !
> >
> >
> A 12 inch drop onto a solid surface is plenty enough to shift a
> speaker magnet.

** Yawnnnnn..........

But not at all likely in the case actually described.

....... Phil


tech / rec.audio.pro / Re: NHT Super One monitor distortion

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