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 2 responses by tooblue

Best case scenario is that you will solve your problem before adding a subsonic filter, I personally haven't needed them in my systems since moving up from an AR EB101 to a VPI Scoutmaster then a Prime. If you decide that you need the filter search for the Nakamichi SF-10 or SF18 which are 10Hz and 18Hz filters with a 6 db roll off they were my go to filters when needed and they do fix the problem. I sold mine with the AR or I would give you mine. Good luck
If you decide on using the filters and you have no issues with other sources then plug directly into phono stage and then plug table into them.