Level the floor

Yeah, I had no idea to even start with this.  For example:

You could try something as simple/cheap as hockey pucks.

I had no idea!  (I don't suppose there's a preferred brand of... no no no ignore that.)

So, first: thanks for the questions.  Somewhere to think from.

Type of floor: carpet on top of concrete.  Changes to the carpet, like cuts of sections, for example, are out of the question.

Adjustment on the front of the system stacks: I'm guessing the question there is, can I change the shape of the equipment stack itself?  If so then the answer is, "no", it's a series of steel needles on a metal frame.  For this part, I think "pucks".  Done.

The speakers are my main concern.  Each channel involves two sections:

A small, light channel expects to run near eye-level, standing some inches away from the main stack.  Here too I think "pucks", done.

The primary speaker stack is my chief concern.  It weighs about 120 lbs, measures about 20" deep, 16" wide, expects to sit near floor level.

These speakers are known for being room-sensitive; tweak, shove, tweak AHA!  Glory!  ...so adjustability is important; standing it on sets of spikes of adjustable lengths wouldn't be good.

Currently I'm thinking: first layer, pucks; on top of that, a flat sheet of something that we set between the speakers and the pucks.  "Something simple and cheap" would be grand, but nothing is springing to mind.  Stability is obviously important, non-resonance...  Light weight would be nice, but flimsy would be bad.  Ugly, I don't care, sheets of fabric solve all things.

I do have some access to tools.  While "two circles of steel" would be a dumb idea (uh, right?), something similar to that might not be out of the question, depending, maybe.

Thanks, all.

Yeah.  At this point, cushions atop chair, mix and match, but, yeah.  One issue at a time.

Ehem.

[exhale]  Well done, well done.

I had no idea that custom-size hunks of granite were cheap, and/or subject to such fine specs.  See, this (and others) are just the info I came in without.

Thanks, all.

The only item which MUST be level is a turntable, and that is usually easily fixed.

Right.  This floor is not flat.

As discussed (and, okay, discussed...), this is some serious tilt.  I wouldn't want to have a desk that tips this much.  Okay, so, stick some books under the desk -- 'tis the way -- but sound-making machinery is prone to Surprises and I didn't want to learn that I'd solved this the dumb way when I heard a bang.  So, I asked.

Turntable: pucks.  Huzzah.

Speakers: I wouldn't want to run those on a tilt either.  Call me picky, but this set is modular, irreplaceable, with some heavy magnets at the top, and this much tilt makes me nervous.  I also want to be able to adjust them, the floor is carpet, that can cause surprises, and and and.

I've learned, for which I'm grateful.

jonwolfpell

 

That’s a big slope but just because the basement floor sunk or rose in as area, doesn’t necessarily, & hopefully not, mean the foundation walls moved. They’re most likely not contiguous.

This is a common shape on houses here.  19th/20th century Illinois; when they were first built the basement was not a useful floor, so much as a "bottom".  The concrete was poured in sometime after, with existing pipes and whatever already in place, so a perfectly level floor would have led to a ceiling hitting heads.

It's not sinking, it was made that way.