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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Boston Acoustics 251, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Boston Acoustics 251 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Boston Acoustics 251. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Boston Acoustics 251 should contain:
- informations concerning technical data of Boston Acoustics 251
- name of the manufacturer and a year of construction of the Boston Acoustics 251 item
- rules of operation, control and maintenance of the Boston Acoustics 251 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Boston Acoustics 251 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Boston Acoustics 251, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Boston Acoustics service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Boston Acoustics 251.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Boston Acoustics 251 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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Page 1
25 1 26 1 Designer Series In-W all Speaker Systems[...]
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Page 2
2 Specifications 251 261 Frequency Response (±3dB) 66 – 20,000Hz 58 – 20,000Hz Recommended Amplifier Power 10 – 1 00 watts 1 0 – 1 00 watts Nominal Impedance 8 ohms 8 ohms Sensitivity [1 watt (2.83v) at 1m] 89dB 90dB T weeter 3 ⁄ 4 " (19mm) dome 3 ⁄ 4 " (19mm) dome Bass Unit 5 1 ⁄ 4 " (135mm) copolymer 6 1 ⁄ 2 &quo[...]
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Page 3
3 Installation Instructions IMPORT ANT : 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 envir onment behind the wall or ceiling in which the speakers will be installed. Quantity Description 2 Designer Series Speakers 2 Mounting Br[...]
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Page 4
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 r elocation of the furniture in the r oom, while still allowing for an unobstructed sound path from the speakers to the listening area. W ithin reason, wher[...]
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Page 5
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. 3. After painting, remove the mask by car efull[...]
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Page 6
6 Pr eparing for Installation Map out the wiring paths from the speakers to the amplifier . We recommend 18-gauge wir e for runs up to 25 feet, and 16-gauge or thicker for longer runs. Be sure the speaker wir e 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 t[...]
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Page 7
3. Remove the speaker grille. Carefully pry each corner with an awl or a small screwdriver . 4. Prepar e 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 thr ough the cable clam[...]
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Page 8
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 r epeated operation of yo[...]