I do exactly as you describe, wheels to the rescue.
my speakers are quite heavy, but 60-80 lbs is a lot, heavy enough for wheels IMO. Go to Home Depot, pick up an 80 lb bag of concrete, walk the length of the aisle. Put it on the floor, try to push it with your foot. I’ve done spikes/wheels, nothing lost by wheels, much flexibility gained.
the advantages of easy toe-in modification for two listeners important as well as ’parking’ them. Luckily I have a wood floor with a grid, alternate symmetrical location marks easy.
3 wheels (2 front, 1 rear center), always avoids wobble, more weight per wheel than 4. (more below). Not swivels, too much easy movement, you can slip/slide sideways as straight rolling wheels slowly roll forward.
four alternate positions
a. ideal for listening, out, away from rear and side walls, toed in to pre-defined angle,
b. toed in further when/for two chairs and a small center table. either chair closer to one speaker but other speaker aimed more directly, volumes equal enough to preserve imaging for two.
c. half way ’back’ lower volume listening, more room to get around.
d. fully ’parked’ in the corners when needed/desired, in your case also WAF.
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rear ’slightly short’ corner blocks, to prevent tipping.
3 wheels is unstable, I put two rear corner blocks, 1/4" shorter than the rear center wheel. any tip is ’caught’ quickly by the corner block, but when in position the blocks do not touch the floor.
therefore a rectangular dolly can be modified, move one of it’s rear wheels to the center, and add some ’slightly short’ rear corner blocks/
a triangular dolly will have no place to attach corner blocks, so you need to attach a rectangular platform to the top of the triangular dolly.
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skirt
a skirt around the rolling platform can be built to conceal the wheels.
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tilt speakers back slightly?
Add a block above the two front wheels to raise the speaker’s front up (situation varies of course). After forward location and toe-in is essentially solved, listen, then try a temporary block,
a. time alignment of drivers (highs travel faster than lows) (also WAF involved)
b. aim tweeter’s narrower sound waves directly to ear height of listening position
c. non-parallel initial and reflected sound waves to floor, ceiling, and reflections off rear wall will be more diffuse. toe-in avoids this for side walls.
Mine: a matching wood skirt, 3 permanent wheels, rear anti-tilt corner blocks, and front lift.
Wheels: mine: enough surface to avoid marking the wood floor, but the smaller the contact surface, the more weight/contact area, and
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office chairs, professionally ordered, offer two types of casters:
hard wheels on carpet/soft surfaces. slightly soft surface wheel on hard floor material.
Note: you don’t need to get perfect wheels to get started if you set it up to change them later if you find something preferable.
