Explain the BRUSH? Is this one attached to the Cartridge or Tonearm, or is it just a hand held brush for cleaning the records before you play them?
I have a Stanton that as a brush attached, and it does require extra weight to offset the upward force of the brush.
I think it requires an extra 1 gram of tracking force. So if I functionally want 2g, then I have to set it for 3g.
Perhaps this not what you meant, but it wasn't clear.
What you are likely experiencing is Rumble,
which is a type of low frequency feedback. The needle vibrates the speakers, the speakers in turn vibrate the needle causing a feedback loop.
Consider where the Turntable is in relation to the speakers, sometime all it take is a small repositioning of the speakers or turntable to stop the feedback.
That's why people asked about whether the cover was up or down. If the cover is down it could help block the sound from the speakers, though it could also set up a resonant cavity, so it is not sure thing.
I suspect, moving the speaker forward would make the most difference. Try moving the speakers forward by about a Meter or a Yard, and see if you still have the feedback. This may not be practical in your room, but it serves as a test to verify the problem.
Also, putting the speakers literally back against the wall or in the corners is not a good thing. True it boost the bass, but it does so at the sacrifice of Mid/High clarity. While the bass is boosted, what you hear is the Mid/High becoming more recessed and muddy.
In my case, I have my turntable next to a pretty big speaker, but I am able to offset any feedback problems by careful placement of the speakers.
Shear Volume can also be a problem. If you are playing excessively loud, that could explain the feedback.
Again, if this is a placement issue of the Turntable relative to the Speakers, I can think of several potential solutions, but I don't really have enough of a sense of the system or the room to make those suggestions. A photo would be helpful.
Again, a list of the equipment you have and a photo would be very helpful to solving the problem.
Keep in mind, there is a (Square)
factor, as in X²
, which is why small changes in the position can make a big difference in the feedback problem.