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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JBL SUB 550PBK, 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 JBL SUB 550PBK 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 SUB 550PBK. 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 SUB 550PBK should contain:
- informations concerning technical data of JBL SUB 550PBK
- name of the manufacturer and a year of construction of the JBL SUB 550PBK item
- rules of operation, control and maintenance of the JBL SUB 550PBK 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 SUB 550PBK 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 SUB 550PBK, 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 SUB 550PBK.
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 SUB 550PBK 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
1X Included Items Yo ur n ew J BL ® S UB 5 50 P 30 0- wa tt p ow er ed s ub wo of er i nc or po - ra te s a 10 " (2 50 mm ) fo rw ar d- fir in g co ne t ra ns du ce r an d a bu il t- in hi gh -p er fo rm an ce 3 00 -w at t RM S am pl ifi er t ha t de li ve r th e po we rf ul , dy na mi c an d ac cu ra te l ow -f re qu en cy p er fo rm an ce[...]
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Page 2
2 ImPort ant saFetY InstructIons 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8. Do not install near any heat sour[...]
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Page 3
3 w w w .j bl . co m Eng li sh suBWooFer rear-P anel controls and connectIons Phase switch: This switch determines whether the subwoofer driver’s piston-like action moves in and out in phase with the system’s other speakers. If the subwoofer were to play out of phase with the other speak- ers, the sound waves from the other speakers could parti[...]
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Page 4
4 PlacIng the suBWooFer The performance of a subwoofer is directly related to its placement in the listening room and its physical position relative to the other speakers in the system. While it is true that in general our ears do not hear directional sounds at the low frequencies where subwoofers operate, when installing a subwoofer within the lim[...]
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Page 5
5 w w w .j bl . co m Eng li sh oPera tIng the suBWooFer TURNING THE SUBWOOFER ON AND OFF Set the subwoofer’s Power switch to the “On” position. The subwoofer will automatically turn itself on when it receives an audio signal, and it will go into Standby mode after it has received no audio signal for 20 minutes. The subwoofer’s On/Standby LE[...]