Directed Electronics 250 manual

1
2
3
4
5
6
7
8
9
10
11
12

Go to page of

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of Directed Electronics 250, 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 Directed Electronics 250 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 Directed Electronics 250. 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 Directed Electronics 250 should contain:
- informations concerning technical data of Directed Electronics 250
- name of the manufacturer and a year of construction of the Directed Electronics 250 item
- rules of operation, control and maintenance of the Directed Electronics 250 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 Directed Electronics 250 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 Directed Electronics 250, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Directed Electronics 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 Directed Electronics 250.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the Directed Electronics 250 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

  • Page 1

    OWNER’S MANUAL Models 150/250/400[...]

  • Page 2

    © 1999 Directed Electronics, Inc CONGRA TULA TIONS Thank you for choosing a Directed Audio power amplifier . Directed has been the leader in high-quality and innovative security products in the U.S. since 1990. Now we introduce to the car audio industry the same winning formula - products that meet the strin- gent standards of today’ s mobile el[...]

  • Page 3

    1 © 1999 Directed Electronics, Inc T ABLE OF CONTENTS High-powered car audio systems may produce sound pressure levels that exceed the threshold at which hearing loss may result. They may also impair a driver’ s ability to hear traffic sounds or emergency vehi- cles. Use common sense and practice safe listening habits when listening to or adjust[...]

  • Page 4

    © 1999 Directed Electronics, Inc 2 INST ALLA TION GUIDELINES 1. Please read the owner’ s manual carefully before you install the amplifier . 2. Disconnect the battery ground terminal prior to making any elec- trical connections. 3. Check for any hazards or obstruc- tions such as gas tanks, fuel or brake lines, and wiring harnesses before mountin[...]

  • Page 5

    © 1999 Directed Electronics, Inc INST ALLA TION GUIDELINES (continued) 3 is generated. For low impedance speaker applications or restricted ventilation installations, an external cooling fan may be advisable. 9. Y our connections to the amplifier’ s speaker and power terminals should be made with crimped spade lugs, and the battery and ground co[...]

  • Page 6

    4 © 1999 Directed Electronics, Inc 1. GROUND TERMINAL - connect this terminal to the car chassis with a short heavy gauge wire, DO NOT CONNECT TO THE NEGA TIVE TERMINAL OF THE CAR BA TTERY or to factory chassis ground points already occupied by factory wires! If you are grounding multiple ampli- fiers, you may use a high-current distribution block[...]

  • Page 7

    5 © 1999 Directed Electronics, Inc 1. RCA INPUT JACKS - accepts line- level outputs from head units or signal sources at voltages from 200 mV to 8 volts. High-grade shielded or twisted pair RCA cables are recommended for this input. 2. GAIN ADJUSTMENT - controls the gain (input sensitivity) of the amplifier . 3. CROSSOVER SELECTION SWITCH - contro[...]

  • Page 8

    6 © 1999 Directed Electronics, Inc SPEAKER WIRING DIAGRAMS Stereo operation Mono operation Simultaneous stereo/mono operation[...]

  • Page 9

    7 © 1999 Directed Electronics, Inc CROSSOVER SETTINGS AND GAIN ADJUSTMENT Y our Directed Audio power amplifier needs to be adjusted carefully to achieve maximum performance. These are some guidelines to follow when fine-tuning the amplifier . • For full-range and simultaneous stereo/mono bass applications, the crossover selection switch should b[...]

  • Page 10

    8 © 1999 Directed Electronics, Inc SPECIFICA TIONS 150/250/400 RMS continuous power per channel , both chan- nels driven into 4 ohms from 20 to 20,000 Hz, with less than 0.08% T otal Harmonic Distor tion @ 14.4 VDC RMS continuous power per channel , both chan- nels driven into 2 ohms from 20 to 20,000 Hz, with less than 0.1% T otal Harmonic Distor[...]

  • Page 11

    9 © 1999 Directed Electronics, Inc Directed Electronics, Inc. (DEI ® ) promises to the original purchaser , to replace this product should it prove to be defective in workmanship or material under normal use, for a period of two years from the date of purchase by the dealer as indicated by the date code marking of the product PROVIDED the product[...]

  • Page 12

    • SINGLE AND DUAL VOICE COIL SUBWOOFERS • COAXIAL SPEAKERS • COMPONENT SPEAKER SYSTEMS © 1999 Directed Electronics, Inc • Vista, CA 92083 • All Rights Reser ved G45022 9/99 Always use a DEI is a proud member of • CLASS D MONO AMPLIFIERS • 2 CHANNEL AMPLIFIERS • 4 AND 5 CHANNEL AMPLIFIERS • SIGNAL PROCESSORS • SINGLE AND DUAL VO[...]