Micro Reference satellites are ideally suited for use as surround speakers in a high-quality home theater system or as extension speakers for another room in the house. MagnaGuard magnetic shielding allows placement next to a television or computer monitor. 3/4 inch Tweeter, 3 and 1/2 in Bass Unit, 120 –20,000Hz, 89dB, 15-100 watts, 8 ohms. Dimensions 6⅞ in X 4¼ in X 5¾ in. Also See Boston Acoustics Center Channel Speaker