Weird issue with my VPI... please help

I have a VPI Scoutmaster with a Shelter 501 MKII cartridge.

This is fairly new, so cartridge has maybe 40 hours on it.

Imagine a graphic EQ where you pushed the lowest band up full... and did the same to one other band in the upper midrange... and that's what it sounds like.

I thought it was something else in the playback chain, but I've isolated it to the turntable (switched phono stages to be sure). Other sources play fine so it's not the preamp or speakers etc.

Any ideas? I don't know if it's always been like this because when I first got the turntable I had some serious speaker issues where I couldn't hear the difference between any electronics (had a very muddy sound). Now that I have that cleared up (CDs sound great) I can hear the difference between different preamps etc... so I finally sit down to hear what my new vinyl collection actually sounds like... only to find out I have a problem of sorts.

The cartridge was setup by Elusivedisc.com where I bought the turntable.

Any help much appreciated!