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Bass distortion-Playing LP's only,,,,please help

VPI Prime----Ortofon Black Quintet (low output moving coil cart)-----Plinius Koru Phono Pre( loading at 20 ohms/gain at 66 db)-----Parasound Halo Integrated -----Martin Logan Montis speakers which have powered bass cabinets.

Using any other source component I have absolutely no issues. When I play an LP and increase the volume past 10 O'clock which is a little loud....but not ridiculously loud-I at times get this huge wave of bass distortion. I do have bass controls on the Montis's...and I have turned them down into the negative, but I still get what I previously described occasionally. 

Any and all help would be appreciated. This doesn't always happen, but its frequent enough to drive me crazy.

Thanks in advance.

krelldog

Showing 4 responses by krelldog

krelldog OP
313 posts
 
Wow.... I have never heard of a rumble filter....but it sounds spot on to my issue. My bass cabinets aren't accessible,so I can't confirm the rumble. However for 180 bucks its worth a try.... thanks guys.
krelldog OP
313 posts
 
I ordered the KAB Rumble filter.....I'll let you know what the results are. I can't move my turntable due to my setup. I did move the M/L Montis's out into the room more.....The amazing thing is: It doesn't happen all the time. The sound in my new setup is spectacular. I just want to cure the rumble issue.
krelldog OP
313 posts
 
The KAB rumble filter did not solve the issue. In fact my system did not like the addition. I am solving the issue by adjusting the bass controls on the Martin Logan Montis's,,,,,and moving the Montis's farther out into the room away from the turntable. I did try these adjustments before I bought the rumble filter.....but for some reason I'm having better results now. I'm still considering a isolation platform for my VPI Prime also.....thanks for all the suggestions.
krelldog OP
313 posts
 
I get the cartridge loading, I have a lot of choices with my Plinius Koru.

Without sounding stupid...and I've never proclaimed myself an audio expert....

What exactly is Turntable isolation???  The first thing that comes to mind is a 2-3 inch platform underneath the turntable. I'm all in on this. I've certainly made the investment in LP playback. What else am I missing in terms of isolating my turntable???

As always I truly appreciate the help and guidance of other audiophiles that know a helluva lot more about this stuff than I do.
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