The ultimate in audio perfection, the ID1.15 series includes 3-Way and 4-Way speakers in tower, in-wall, and on-wall designs. Built to function as left and right mains, these speakers pump an ultra rich sound from deep bass to crystal clear highs. With massive dual 15" subwoofers and an 8" mid-woofer in a high-power 4-Way/3-Way floor standing speaker, the ID1.15 minimizes floor space requirements for multiple subwoofers. A switch on the back of the speaker separates the subwoofers for use in home theater applications by switching out the internal 80 Hz crossover so that the two subs can be separately powered by a subwoofer amplifier. Carpet spikes included.