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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Kenwood KAC-818, 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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Unfortunately, only a few customers devote their time to read an instruction of Kenwood KAC-818. 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 Kenwood KAC-818 should contain:
- informations concerning technical data of Kenwood KAC-818
- name of the manufacturer and a year of construction of the Kenwood KAC-818 item
- rules of operation, control and maintenance of the Kenwood KAC-818 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
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Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Kenwood KAC-818 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 Kenwood KAC-818, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Kenwood 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 Kenwood KAC-818.
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Table of contents for the manual
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Page 1
KA C-818 © B64-1 355-00 (EM) MONO PO WER AMPLIFIER INSTR UCTION MANU AL[...]
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Page 2
2 English Saf ety pr ecautions T o prev ent injury or fire, tak e the follo wing precautions: • When extending the ignition, bat ter y , or ground wires, make sure to use automotive- grade wires or other wires with a 5mm 2 (A WG1 0) or more to prevent wire deterioration and damage to the wire coating. • T o prevent a short circuit, ne ver put o[...]
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Page 3
English 3 Installation pr ocedur e Installation Since the pow er amplifier has no parts which require operation, it can be installed at a position aw ay from the driver’ s seat without any hindrances. As generally accepted positions for its installation, places such as inside the tr unk, etc. can be considered. • Do not install the unit under t[...]
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Page 4
4 English Contr ols Operations of the f ollowing contr ol and switches ar e r equired in accor dance with the center unit and speak ers connected with this unit. MONO POWER AMPLIFIER L 25Hz 15Hz INFRASONIC OFF INPUT SENSITIVITY(V) LPF FREQUENCY(Hz) GND R LINE IN 0.3 0.5 1 2 3 4 5 0.2 150 100 70 50 200 LEFT RIGHT SPEAKER LEVEL INPUT POWER IN FUSE(20[...]
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Page 5
F or the pre-output level or the maximum po wer output, ref er to the “Specifications” in the instruction manual of the center unit. 0 RCA cable gr ound lead terminal ! LINE IN terminal @ Speaker le vel input terminals NO TE ■ P ow er indicator: When the pow er is turned on, the P ower indicator lights. If the P ow er indicator does not light[...]
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Page 6
• The genuine-accessory car stereo shall have a maximum pow er output of no more than 25 W . • Do not connect the speaker output leads from a pow er amplifier (Optional) to the speaker input terminals of this unit, for this may cause malfunction or damage. • Do not connect cables and leads to both RCA cable input jac ks and the speaker input [...]
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Page 7
English 7 SPEAKER OUTPUT SERVO ΙΙ ∑ SERVO ΙΙ ∑ POWER IN FUSE(20A) BATT GND FUSE(20A) P.CON(REMOTE) SPEAKER OUTPUT 20 20 SERVO ΙΙ ∑ SERVO ΙΙ ∑ - + ■ P ow er and Speakers cable connection T erminal cover Bat ter y Ground cable (Commercially av ailable part) Bat ter y cable (Commercially av ailable part) P ower control cable (Commerc[...]
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Page 8
8 English Sigma serv o f eed back The sound reproduced through conv entional amplifiers is distorted due to the counterelectromotive force produced in the oscillating system of the speak er . The counterelectromotive force is particularly high with the woof er whic h requires a large drive mass.The sigma servo connection reduces distortion caused b[...]
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Page 9
English 9 Specifications Specifications subject to c hange without notice. A udio Section Max P ower Output (2 Ω )..................................................................................................400 W × 1 Rated P ower Output (4 Ω ) ......................................................................................20 0 W × [...]