Last ditch attempt to save my B&W MM-1 - Would higher rated PSU help?

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Originally Posted by Kendalbeefcake

Hi Alan,
I'd say it's detectable @ 50% volume, but at higher volumes it becomes so pronounced it begins to ruin the experience on about 20% of tracks. Certain frequencies is probably a better explanation; it's always certain points in certain tracks; some albums are perfect.

Describing the distortion is tough; it's like the vocal is suddently being routed through some particularly tinny laptop speakers; the verse ends and it soars once again..It's not a bass issue as far as I can tell; if anything it's the reverse; it's treble that seems to be the victim... Does that shed any light?

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It sounds like a resonance within the speakers, being set off by the volume level.
Without looking inside the speakers/ enclosure it is difficult to pin down further.

:)

Hi Kendal,

Have you tried contacting B&W service? They may be able to look at them properly for you, before attempting a non-standard power supply.

Here's their contact number: 0800 232 1513.

Cheers

Thanks for your assistance; I did briefly consider contacting B&W support, but at the last minute I re-ran one of my earlier tests on the Analogue line-in and couldn't reproduce the issue. So as was suggested I ordered the attenuator plugs..And it's much better. Certainly, 4/5 of my "worst offender" tracks are perfect, and only one is still has some "crackle", but is still much better than it was. I'm still not 100% happy, but spending £40 has stopped me from spending £600+ for the forseeable future. Thanks again for your help people :)