In my old house I had to remove the sub and shuffle everything over to accommodate the Christmas tree.

In the new house everything stays exactly where it’s best and calibrated for.

Thus I want to mount my speakers on a preexisting console,…

Can you explain what you mean by Console, and perhaps provide a link to a photo of the console or one similar to it?

If by console you simply mean the cabinet with your Audio Equipment is in, then that is not the prime choice. It is a Workable Choice, but not the Ideal Choice. Rather than placing the speakers on a cabinet top, you are better off buying or making Speaker Stands.

In general, you want the speakers away from Boundaries - walls, ceiling, floor, counter tops - probably the most critical boundary is the wall behind the speaker. The amount away from boundaries is based on the size of the speaker, and the amount of bass it already has. Floorstanding speakers need more space (generally) and Bookshelf need less space (generally).

Putting the speakers on top of a cabinet, introduces a very close boundary, the tabletop. If you place the speaker on a counter top, it is recommended that they be as far forward on the counter top as possible, and in some cases some would say overhanging the front edge by a small amount.

If you decide to use Speaker Stands, remember that to keep the stand stable, you can fill them with SAND or Aquarium Gravel. They don’t necessarily have to be FULL, you can decide for yourself how much you want to put in.

And if you Custom Build your own stands, make sure you can remove the Top (or Bottom) in order to fill and empty the Stands. And make sure that the Column of the Stand is sealed so Sand Dust does not leak out. The nice thing about Aquarium Gravel is that will very small granules, there is no Dust.

Walmart - Aquarium Gravel -

https://www.walmart.com/search?q=aquarium gravel 25 lbs&typeahead=aquarium gravel

Plain (not colored) Gravel is the cheapest. Here is 25 Pounds for roughly 88¢/pound -

https://www.walmart.com/ip/Aqua-Culture-Aquarium-Gravel-Natural-25-lb/10449968?from=/search

Common Sand (Play Sand) on the other hand is about $7 for 50 Pounds - ~14¢/pound -

https://www.homedepot.com/p/SAKRETE-50-lb-Play-Sand-40100301/202007298

It must be DRY SAND, Kiln Dried Sand.

Also, when adding Sand, you can put the Sand in smaller Zip-Lock bags and just drop many bags into the column.

Can you put Speakers on a Cabinet Top - Yes? Should you - Maybe? It is certainly functional, but I don’t think anyone would say it is ideal. That said, we all do what we have to do given our circumstances.

So, my main point, outside of all the rambling, is - can you show us the console or a photo of a similar cabinet? That would give us some perspective. And can you identify the Speakers in question?

Have I found the sweet Spot in my room? No, but I have found the best spot under the circumstances, and that is with the speakers about 16" forward of the wall behind (16" from the wall to the back of the speaker, 27" from the wall to the front of the speaker).

As to moving the Speakers, yes, on occasion I do have to move the speakers, though it is uncommon.

I had floor-standers (with passive radiators in the rear) against the back wall for years; when I changed floor covering from carpet to laminate, it changed the room response sufficiently that moving them out from the wall by a foot improved imaging and frequency response noticeably. I would never lock in a position - changes as small as different furniture can make a difference in SQ.

I have them on wheels. Wheels/wood/rubber/wood/rubber/concrete/spikes. Move them in between tv and daytime listening position

It’s something I tweak every now and then. Realistically, it’s my chair moving though.