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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
czarivey
5,946 posts
 
So are these electrostatic panels shielded or not?
How does 4kv static charge sounds to ya and how it's compared to the delicate LOMC output? 

krelldog OP
317 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.
moonglum
619 posts
 

Czarivey, it works wonderfully well, thank you for asking. ;^)

 

On the other hand it’s not entirely clear what is being asked as the question is somewhat nebulous?

The first argument was EMI based but now the goalposts have moved?

Are you asking about possible stray capacitance?

A possible potential gradient between an electrostatic loudspeaker stator and nearby objects?

Or, entering Dr Strange territory, “a quantum field relationship” between the elements of a hifi system? ;^)

moonglum
619 posts
 

OP, personally, I would tend to explore the rumble filter option last rather than first.

Have you tried messing with the sub-woofer bass contour controls? Mine are 4.5ft from the front wall but I still need a sizeable bass cut to avoid overwhelming the room. :)

The added benefit is that it stops the spikes and panel bolts from vibrating loose! ;^) :D


I think it’s a given that you probably visit the MLC website but if you do there will be plenty of good advice there as well.

Good luck!

feinstei
1 posts
 
I can also add my praise for the KAB Rumble filter.  I had a horrible time with my McIntosh turntable thumping on certain LP's.   The KAB Rumble filter totally eliminated the problem and made all of my LP's sound better.
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