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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JBL 28T-60, 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.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of JBL 28T-60 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 JBL 28T-60. 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 JBL 28T-60 should contain:
- informations concerning technical data of JBL 28T-60
- name of the manufacturer and a year of construction of the JBL 28T-60 item
- rules of operation, control and maintenance of the JBL 28T-60 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 JBL 28T-60 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 JBL 28T-60, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JBL 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 JBL 28T-60.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JBL 28T-60 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
Control ® 28T -60 High Output Indoor/Outdoor Background/Foreground Speaker Key Features: 䉴 Isolation transformer for 70.7V/100V distributed-line sound systems 䉴 Components: 8” Polypropylene coated woofer , 1” Titanium coated horn loaded tweeter 䉴 Built-in InvisiBall TM mounting hardware* 䉴 W eather resistant enclosure and transducers ?[...]
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Page 2
䉴 Control ® 28T -60 High Output, Indoor/Outdoor , Background/Foreground Speaker Frequency Response in half-space with 70.7V input, taps #1 through #4. For 100V input, r aise each cur ve +3dB. Beamwidth Directivity Inde x, Q Horizontal Of f Axis F requency Response V er tical Off Axis Frequency Response (up) V er tical Off Axis Frequency Response[...]
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Page 3
Horizontal 1/3 Octave P olars Architectural Specifications: The loudspeaker shall consist of a 200mm (8 in) low frequency trans- ducer , 25mm (1 in) high frequency transducer , and frequency dividing network installed in a ported enclosure. The low frequency voice coil shall be 32 mm (1-1/4 in) in diameter . Performance specifications of a typica[...]
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Page 4
JBL Professional 8500 Balboa Boulevard, P .O. Box 2200 Northridge, California 91329 U.S.A. A Harman Inter national Company SSCONTROL 28T -60 CRP 10M 7/98 䉴 Control ® 28T -60 High Output, Indoor/Outdoor , Background/Foreground Speaker V er tical 1/3 Octave P olars[...]