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#266207 - 2017-07-20 13:50 Unwell DSP5000C
Registered: 2008-10-11
Posts: 408
Tarik Offline
Hitchhiker
Tarik Offline
Hitchhiker

Registered: 2008-10-11
Posts: 408
Loc: Gloucestershire, UK
I am getting a squeal when the speaker is powered on from the switch at the back and then a thrum-thrum-thrum-thrum through the speaker when the source is not switched on.

When the source is switched on it goes away. After that if the source is switched of unexpected sounds can still be heard sometimes.

Speaker otherwise plays ok and not a source or cable issue as when substituted all is ok.

I have replaced the electrolytic caps and resistors in the amp section and the issue is still there.

Any ideas/pointers where to look next?


Lounge: DSP5200, 518
Snug: DSP33 x 5, 518, C61R
Office: M33, 561

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#267922 - 2017-09-21 16:01 Re: Unwell DSP5000C [Re: Tarik]
Registered: 2006-09-18
Posts: 149
TimC Offline
Hitchhiker
TimC Offline
Hitchhiker

Registered: 2006-09-18
Posts: 149
Loc: Dorset, UK
Hi

Is the thrum thrum thrum happening when no source is connected? If not, it could be the source.

I have a set of DSP5000s (24 bit) and one of them squeals when powered on like yours. I asked Chris the Meridian repair guy when he was repairing stuff about that and he said don't worry about it... some speakers do that! I guess he didn't find the cause.

My workaround is to quickly flick the switch on the rear of squeaking speakers very quickly on and off... then on again. If I catch it right, it doesn't squeak.

I bought these speakers 2nd hand non working. I have had to play around with them to get them working and from memory I think the 'problem' is on the Amp board as I have swopped them over and the squeal moves with the Amp board. Other than that, they work OK and sound really good.


Main: 561M, DSP5000 x 4, DSP5000C, 598, 504, 2 x M&K850 Subs, Sony Blueray, LG 50" Plasma,

Attic: 565z3, 500, 562V, Audiolab 8000 C+P, Rega Planar 3, Michell Mycro, various cartridges, various tonearms, RPM 5.2, Musical Fidelity X-LPS V3, Rogers LS55
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#267952 - 2017-09-22 07:16 Re: Unwell DSP5000C [Re: TimC]
Registered: 2008-10-11
Posts: 408
Tarik Offline
Hitchhiker
Tarik Offline
Hitchhiker

Registered: 2008-10-11
Posts: 408
Loc: Gloucestershire, UK
I think I worked this one out.

The speaker was originally 115V and so to test it was working I temporarily took the transformer from one of my DSP5000s and connected it up to this speaker.

As I was being lazy I did not connect the earths to the screw on the rear panel. As a result I think I created some kind of earthing problem.

Lesson learnt.

As I've had no luck sourcing a transformer I am now thinking of breaking for spares.


Lounge: DSP5200, 518
Snug: DSP33 x 5, 518, C61R
Office: M33, 561

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