This makes it harder to stand up vertically without the help of the sold seperately expensive stand. If the speakers are meant to fill up a large room with sound, they won't, but they will perform admirably for a smaller space. The maximum input power is 50 watts and the suitable amplifier power range goes from 15 watts to 100 watts. The internal volume of the speaker is 2.9L, which is also 0.10 cubic feet. The speaker is 4-1/4 inches high, 12 inches wide and 5-5/8 inches deep. It comes with three options for finishes: Black, Silver or White.