251 261 Designer Series In-Wall Speaker Systems
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.
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.
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 speakers to the listening area. Within reason, wherever the speakers look right is where they’ll sound right. For best results, place the speakers 6 to 10 feet (1.8–3.
Painting the Speakers If you intend to paint the speakers, it’s best to do so before installation. 1. Remove the speaker grille. Carefully pry at each corner with an awl or a small screwdriver. 2. Use the form-fitting painting mask provided to paint the housing. Cover the slots with masking tape. Use masking tape to cover slots Bosto n 3. After painting, remove the mask by carefully inserting a screwdriver into the slots. Do not puncture the drivers behind the mask with the screwdriver. 4.
Preparing for Installation Map out the wiring paths from the speakers to the amplifier. We recommend 18-gauge wire for runs up to 25 feet, and 16-gauge or thicker for longer runs. Be sure the speaker wire does not rest or rub against any sharp or pointed objects. The speakers should be mounted on a flat surface to form a good seal between the speaker flange and the mounting surface. Each speaker is 8 ohms nominal.
3. Remove the speaker grille. Carefully pry each corner with an awl or a small screwdriver. 4. Prepare the speaker/bracket assembly for installation as shown. For new construction, an optional bracket (Model 35UB for the 251, Model 36CB for the 261) is available from your Boston Acoustics dealer. 5. Route the speaker wire through the cable clamp and connect the wire to the speaker.
Listening Levels and Power-Handling The power recommendation for the speakers assumes that you will operate the amplifier in a way that will not produce distortion. Even our rugged speakers can be damaged by an amplifier if it is producing distortion. If you hear a harsh, gritty noise, turn down the volume. Prolonged or repeated operation of your speaker with a distorted signal from the amplifier can cause damage that is not covered by the warranty.
