Boston acoustics 251 - Manuals

2 Specifications 251 261 Frequency Response (±3dB) 66–20,000Hz 58–20,000Hz Recommended Amplifier Power 10–100 watts 10 –100 watts Nominal Impedance 8 ohms 8 ohms Sensitivity [1 watt (2.83v) at 1m] 89dB 90dB Tweeter 3 ⁄ 4 " (19mm) dome 3 ⁄ 4 " (19mm) dome Bass Unit 5 1 ⁄ 4 " (135mm) copol...

3 Installation Instructions IMPORTANT: This manual assumes the installer possesses skill in the proper use of hand and power tools, a knowledge of local building and fire codes, and a familiarity with the environment behind the wall or ceiling in which the speakers will be installed. Quantity Descri...

4 Placement Since the speaker installation is permanent and the furniture placement may not be, the user should first determine the best long-term location — one that will accommodate future relocation of the furniture in the room, while still allowing for an unobstructed sound path from the speaker...