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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JBL Professional 18S/ST, 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 Professional 18S/ST 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 Professional 18S/ST. 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 Professional 18S/ST should contain:
- informations concerning technical data of JBL Professional 18S/ST
- name of the manufacturer and a year of construction of the JBL Professional 18S/ST item
- rules of operation, control and maintenance of the JBL Professional 18S/ST 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 Professional 18S/ST 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 Professional 18S/ST, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JBL Professional 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 Professional 18S/ST.
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 Professional 18S/ST 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 ® 18S/ST Indoor/Outdoor Subwoofer Key Features: 䉴 Component: Long excursion 200 mm (8 in) driver 䉴 Built-in patented InvisiBall TM mounting hardware 䉴 Overload protection circuitry (Control 18S) 䉴 Complements full-range Control Contractor Series systems 䉴 W eather resistant enclosure and transducer 䉴 High-pass output for satell[...]
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Page 2
Dimensions in inches (mm) 䉴 Control ® 18S/ST Indoor/Outdoor Subwoofer The Control 18S can be connected into a system in a number of configurations: In parallel with full-range speakers resulting in a bass-overlap configuration (which is often acceptable); With an electronic crossover and separate amplifier channel, or; Running a full-range si[...]
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Page 3
Architectural Specifications: The subwoofer loudspeaker shall consist of a 200 mm (8.0 in) low frequency transducer in a vented enclosure. The voice coil sha ll be 38 mm (1 ½ in) in diameter and the coil former shall be of aluminum for maximum heat dissipation. Performance specifications of a typical production unit shall be as follows: Measured[...]
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Page 4
JBL Professional 8500 Balboa Boulevard, P .O. Box 2200 Northridge, California 91329 U.S.A. A Harman International Company SS Control 18S CRP 15M 6/99 䉴 Control ® 18S/ST Indoor/Outdoor Subwoofer[...]