I managed to make mine out of that scrap lumber and it will work just fine behind my false wall, but it is pretty ugly.
Nice and tall... "Ear height" on the tweeters...
Pretty darn solid and surprisingly not tipsy...
With some quality wood, some schedule 40 pvc pipe, a hole saw and a little planning, you could make a nice looking stand. The good wood for the top/bottom plates. Use the hole saw NOT to cut holes, but to cut "partial" holes in the top and bottom, clean and slightly scuff the PVC pipe, cut the pipe, epoxy into the holes in the top and bottom plates, paint...
You wouldn't need something really pricey like oak, but something with a night tight grain and no knots. You could go with a black base coat and then spray a light layer of "hammered metal" or some "textured" spray paint. Light coat being the key to a nice finish. Cover it with a hard enamel clear coat and you are done.
