...'Is this large object going in the same room where you are putting the speakers on the shelf ( because there is not enough room for speaker stands ) ?'...
It's already there. I'm figuring the front legs of the (steel) drafting table could be fitted with side shelves so as to function as quasi stands which would move something like a Dynaudio X12 or a ProAc Tablette approx 30" out from the front wall and 27"ish from the side walls with 4' of not necessarily empty space between inside edges of the speaker cabinets and put the tweeters at much closer to ear level for the critical listening position approx. 6' from the speakers.
It's already there. I'm figuring the front legs of the (steel) drafting table could be fitted with side shelves so as to function as quasi stands which would move something like a Dynaudio X12 or a ProAc Tablette approx 30" out from the front wall and 27"ish from the side walls with 4' of not necessarily empty space between inside edges of the speaker cabinets and put the tweeters at much closer to ear level for the critical listening position approx. 6' from the speakers.