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Standard User Seansmit17
(eat-sleep-adslguide) Tue 05-Mar-19 21:09:26
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Speakers Clipping


[link to this post]
 
Hoping someone can help me out with this issue.

I have Microlab Solo 8C speakers.

Had no issue with them for the past 3 years or so but about 3-4 months ago they started to hum slightly when I turn them on (On any input or muted) and clipping with high volumes or with bass.

I am going to go in and check some voltages and see if I can find something "Hinky" But is there anything else I should be looking for?

TalkTalk 80Mb
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Standard User micksharpe
(legend) Sun 14-Apr-19 17:36:34
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Re: Speakers Clipping


[re: Seansmit17] [link to this post]
 
At a guess, the power supply is failing and cannot provide the peak current that the amplifier is asking for. You may need to replace the capacitors. Note that this is a "current" issue, not a "voltage" issue, so checking the voltages probably won't tell you much.

'Sir, please,' she said ... 'Will you not share your wisdom with us?'
'I have no wisdom,' he told her.
'Your experiences, then?'
'They have been trivial, uninteresting, and full of error.'
Iain M. Banks -- Feersum Endjinn
Standard User Seansmit17
(eat-sleep-adslguide) Thu 12-Dec-19 15:58:39
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Re: Speakers Clipping


[re: micksharpe] [link to this post]
 
Thanks Mick

I am still having this issue. But not got round to trying to fix it yet.

I might try and get some new caps and replace them if its not to much money to do so.

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Standard User duncan5
(newbie) Tue 17-Dec-19 00:01:09
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Re: Speakers Clipping


[re: Seansmit17] [link to this post]
 
A voltage drop will occur if the supplied current into a constant load is not able to maintain the peak current required ,depending on the design of the amp that requires large value capacitors to provide that peak current so maintaining a good quality sine wave at the output.

If the amp is only a few years old that's a pretty quick breakdown in smoothing and reservoir capacitors,
a coupling capacitor between stages can cause hum and distortion as well, earthing should also be checked
if applicable .
Its not a good idea to continue to use them at high levels as the tweeters can be easily damaged by clipping.

Edited by duncan5 (Tue 17-Dec-19 00:07:21)

Standard User Seansmit17
(eat-sleep-adslguide) Wed 29-Jan-20 18:57:31
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Re: Speakers Clipping


[re: Seansmit17] [link to this post]
 
Managed to get the 2 caps I was worried about replaced and it has fixed the issue. All working good again smile

It gets quite warm inside the speaker so I might add a small cooling fan to it to help components last longer

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Standard User micksharpe
(legend) Wed 05-Feb-20 11:28:11
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Re: Speakers Clipping


[re: Seansmit17] [link to this post]
 
Glad to hear that you got it sorted. smile

'Sir, please,' she said ... 'Will you not share your wisdom with us?'
'I have no wisdom,' he told her.
'Your experiences, then?'
'They have been trivial, uninteresting, and full of error.'
Iain M. Banks -- Feersum Endjinn
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