Theater Solutions C1 Bookshelf Center Channel Speaker Surround Sound Home Theater Theater Solutions C1 home theater 3-way center channel bookshelf speaker, recommended power is 10-200 watts, efficiency is 91dB, frequency response is 70Hz-22 kHz, 8ohm 3-way design and functionality, bi-laminate composite, balanced shielded woofers, ferro fluid cooled, titanium coated, balanced, shielded tweeter, 3KHz, 18dB per octave crossover frequency Dual rear port vents, spring loaded raw wire connections, non-resonant MDF enclosure with black wood grain finish, detachable black fabric grill, speaker size is (H x W x D) 6.5"  18"  7.5" Designed and engineered in the USA, this speaker requires a home audio receiver or amplifier to power it Use for surround sound, center channel, home theater, multiple room system, industrial sound, bookshelf, this listing and price is for 1 indoor center speaker