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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JL Audio 12W0v2-4, 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 JL Audio 12W0v2-4 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 JL Audio 12W0v2-4. 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 JL Audio 12W0v2-4 should contain:
- informations concerning technical data of JL Audio 12W0v2-4
- name of the manufacturer and a year of construction of the JL Audio 12W0v2-4 item
- rules of operation, control and maintenance of the JL Audio 12W0v2-4 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 JL Audio 12W0v2-4 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 JL Audio 12W0v2-4, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JL Audio 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 JL Audio 12W0v2-4.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JL Audio 12W0v2-4 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
12WØv2-4 Subwoofers owner’ s manual Congratulations on your purchase of a JL Audio subwoofer component. Your JL Audio subwoofer is a precision loudspeaker which has been engineered to produce the highest quality sub-bass performance in your vehicle. Authorized JL Audio dealers have extensive technical information for many different applications [...]
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Page 2
2 JL AUDIO 12WØv2-4 SUBWOOFER 12WØv2-4 Fr ee Air Resonance (Fs): 28.43 H z Electrical “Q” (Qes): 0.715 Mechanical “Q” (Qms): 10.709 T otal Speaker “Q” (Qts): 0.670 Equivalent Compliance ( Vas): 2.530 ft 3 71.64 liters One-way, Linear Excursion (Xmax)*: 0.45 in. 11.4 mm Efficiency (1W/1m)**: 85.64 dB SPL Effective Piston Area (Sd): 74.[...]
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Page 3
JL AUDIO 12WØv2-4 3 SUBWOOFER RECOMMENDED SEALED ENCLOSURE V olume (net int.) External D imensions ( W idth x H eight x D epth) F3 (Hz) Fc (Hz) Q tc 12WØv2-4 1.375 f t 3 38.94 liters 16 in. x 19 in. x 11.75 in. 406 mm x 483 mm x 298 mm 36.0 47.91 1.179 All specifications are subject to change without notice. SUBWOOFER RECOMMENDED PORTED ENCLOSURE[...]
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Page 4
MINIMUM OPTIMUM MAXIMUM LEGEND: W ARRANTY V OID 12 WØ v2 60 W 1 2 5W 2 5 0 W 5 00 W 30 W Printed in China JLA12WØ v2_MAN_02_09 JL AUDIO warrants this speaker to be free of defects in materials and workmanship for a period of one (1) year from the original date of purchase. Dama ge cause d b y t he foll owing is no t c over ed under wa rranty: a c[...]