Pure Resonance Audio SD4 SuperDispersion Ceiling Speaker Array, Built-In 8 Ohm/70 V Transformer Omni Directional Speaker Coverage 360 x 180 hemispherical. Infinite-baffle in-ceiling speakers drops into standard ceiling tile openings Powerful - 160 Watts at 8 Ohms, 64 Watts at 70 Volts. 4 6.5-Inch High compliance aluminum woofers with ported bass response and high frequency dome tweeters. Uniquely designed fire retardant ABS housing may be painted to match any dcor.