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At what vol level do you get rumble / flutter?

Hi everyone. I hope my Pro-ject Xpression has not started the dreaded rumble / wow / flutter problem. I recently tried a heavier MC Ortofon on my table and after switching it in and out (professionally done), my table will make the woofers rumble / wow / flutter as soon as my normal cartridge (Ortofon MC-3 turbo, HO MC) hits the record with the volume at about twice as high as my normal listening position, which is not party cranking levels, but twice as high is and that is where I see the rumble. Would you say this is normal for Pro-ject and similar tables? Will a Rega RP3 act similarly? Rest of system is posted and it is less noticeable with the rumble filter on. From what I remember, my table did not do this before the cartridge swap. Luckily, it is still under warranty.

TIA
sbrownnw

Showing 1 response by fleib

fleib
1,124 posts
 
Hi Sbrownnw,I haven't compared specs, but this is a very popular regulated switching power supply.
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=120-532

Not all records have built-in rumble, and even a cu/arm mass mismatch, tends to be dwarfed by acoustic and mechanical feedback, causing pumping. Spikes mass couple to the mount. Perhaps if you decouple your table from the shelf, it will help. That is another shelf under the table and supported by inverted cones. If you've already done this, sorry I missed it.
Regards,
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