If you hide most of these speakers, they will sound lousy. You won't get any imaging or bass and the phantom center won't work very well. You need speakers designed for wall mount or bookshelf mount. These won't be nearly as affected by your trying to hide them. KEF, Vienna Acoustics, Soliloquy (defunct but great deals on Sat-5's) and Thiel are a small sample of companies that have done this.
I had gallos and they worked ok but had a very narrow "sweet spot" when trying to hide them. My best results were from Klipsch Cornwalls (indestructible and no sub needed) and from Realistic Pro LX5 (great sound stage but need a sub).
I had gallos and they worked ok but had a very narrow "sweet spot" when trying to hide them. My best results were from Klipsch Cornwalls (indestructible and no sub needed) and from Realistic Pro LX5 (great sound stage but need a sub).