disknic, the problem is not so much how the speaker sounds, it is how the cabinet sounds which is dependent on its construction. 1/4" plywood backs are going to resonate like a drum head and other loose parts are going to vibrate and potentially make a lot of noise.
The best cabinets for bookshelf speakers have no backs at least in the bookshelf section and are solidly constructed with fixed and dovetailed shelves at least an inch thick. Knock down construction is a nightmare.
If you wind up with a few buzzes you can find them by damping various parts with your hand. Once you find them just jamb a little butyl glazing tape in there and that should stop it. You can get the tape at your local Portland Glass dealer or any place that glazes windows.
The large Advents sound best upright on stands. Why are you putting two pairs of speakers in the cabinet? Doing that will ruin your imaging if you care about that.
The best cabinets for bookshelf speakers have no backs at least in the bookshelf section and are solidly constructed with fixed and dovetailed shelves at least an inch thick. Knock down construction is a nightmare.
If you wind up with a few buzzes you can find them by damping various parts with your hand. Once you find them just jamb a little butyl glazing tape in there and that should stop it. You can get the tape at your local Portland Glass dealer or any place that glazes windows.
The large Advents sound best upright on stands. Why are you putting two pairs of speakers in the cabinet? Doing that will ruin your imaging if you care about that.