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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of NAD 2200, 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 NAD 2200 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 NAD 2200. 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 NAD 2200 should contain:
- informations concerning technical data of NAD 2200
- name of the manufacturer and a year of construction of the NAD 2200 item
- rules of operation, control and maintenance of the NAD 2200 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 NAD 2200 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 NAD 2200, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the NAD 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 NAD 2200.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the NAD 2200 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
2200 Power Amplifier Date of manufacture : Jan 87 - Feb 89 Please note that this document contains the text from the original product br ochure, and some technical statements may now be out of date Reproducing musical signals, the NAD 2200 r outinely delivers over 500 watts per channel into typical loudspeaker impedances. In actual measurement with[...]
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Page 2
The 2200 virtually redefines the concept of dynamic head-r oom. Its high power reserves ar e available, not only for the short 20-millisecond bursts used in the standard IHF dynamic headroom test, but also for musical surges and climaxes lasting ten times longer . Even with compressed r ecordings of r ock music in which the peaks may be only 8 dB h[...]
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Page 3
“Audible Clipping” Indicator T o enable the user to make the fullest use of the dynamic power of the 2200, a front-panel “Overload” LED indicator illuminates whenever the amplifier is driven into clipping (or exhibits any other distortion) for a long enough time to be audible. Its calibration is based on psycho-acoustic studies showing that[...]
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Page 4
(2) The 2200 does not abruptly switch from one supply to the other . The output stage is permanently connected to the lower -voltage supply . The commutator is simply an electronic gate that opens when needed to allow current to flow fr om the high-voltage supply-quickly enough to supply the power needed for sudden full-power transients, but smooth[...]
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Page 5
POWER AMP SECTION Continuous output power into 8 Ω * 100W (20dBW) Rated distortion (THD 20Hz - 20kHz) 0.03% Clipping power (maximum continuous power per channel) 140W IHF Dynamic headroom at 8 Ω +6dB IHF dynamic power (maximum short term power per channel) 8 Ω 400W (26dBW) 4 Ω 600W (28dBW) 2 Ω 800W (29dBW) Damping factor (ref. 8 Ω , 50H[...]