Go to page of
A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of McIntosh MC-252, 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 McIntosh MC-252 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 McIntosh MC-252. 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 McIntosh MC-252 should contain:
- informations concerning technical data of McIntosh MC-252
- name of the manufacturer and a year of construction of the McIntosh MC-252 item
- rules of operation, control and maintenance of the McIntosh MC-252 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 McIntosh MC-252 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 McIntosh MC-252, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the McIntosh 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 McIntosh MC-252.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the McIntosh MC-252 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
MC252 Owner ’ s Manual McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, New Y ork 13903-2699 Phone: 607-723-3512 F AX: 607-724-0549 Power Amplifier[...]
-
Page 2
2 IMPOR T ANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERA TING THIS EQUIPMENT . W ARNING - T O REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” with[...]
-
Page 3
3 Customer Service T echnical Assist ance Please T ake A Moment Thank Y ou Copyright 2003 by McIntosh Laboratory , Inc. The serial number , purchase date and McIntosh Dealer name are important to you for possible insurance claim or future service. The spaces below have been provided for you to record that information: Y our decision to own this[...]
-
Page 4
4 Performance Features Introduction • Power Output The MC252 consists of two separate power amplifier chan- nels, each capable of 250 watts into 2, 4 or 8 ohm speakers with less than 0.005% distortion. The two channels can be combined into a single channel with 500 watts into 1, 2, 4, 8 or 16 ohm speakers with less than 0.005% distortion. • •[...]
-
Page 5
5 Connector Information, Introduction, Performance Features and Dimensions The following dimensions can assist in determining the best location for your MC252. There is additional informa- tion on the next page pertaining to installing the MC252 into cabinets. 17- 1/2 " 44.45cm 8- 13/16 " 22.38cm Front V iew of the MC252 Rear V iew of the[...]
-
Page 6
6 Inst allation Caution: The MC252 Amplifier weight is 94.5 pounds (42.87 kilograms). It requires two or more persons to safely handle when moving the amplifier . The MC252 can be placed upright on a table or shelf, standing on its four feet. The four feet may be removed from the bottom of the MC252 when it is custom installed as outlined below . T[...]
-
Page 7
7 T op Panel Connections and Switch Connect the MC252 power cord to a live AC outlet. Refer to information on the back panel to deter- mine the correct voltage BALANCED INPUTS for an audio cable from a preamplifier or control center audio outputs RIGHT Channel OUTPUT s connections for 2 ohm, 4 ohm and 8 ohm Loudspeakers Main Fuse holder, refer to i[...]
-
Page 8
8 Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective T erminal Connection Covers have been inst alled. Failure to observe this could result in Electric Shock. 1. For Remote Power Control, connect a power control cable[...]
-
Page 9
9 How to Connect in Stereo T o AC Outlet 4 ohm Loudspeaker McIntosh C45 Audio Control Center MC252 T op Rear V iew 4 ohm Loudspeaker[...]
-
Page 10
10 Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective T erminal Connection Covers have been inst alled. Failure to observe this could result in Electric Shock. There are two different ways of operating the MC252 mon- [...]
-
Page 11
11 How to Connect in Mono Bridged Mode T o AC Outlet 4 ohm Loudspeaker McIntosh C45 Audio Control Center MC252 T op Rear V iew M ono B r idge H ookup C onne cti ons Louds pe ak e r I mpe danc e Loudspe aker N egat iv e ( -) Connec t ion Loudspe ak e r P os it iv e (+ ) Conne ct ion 4 S (O h m ) Le f t O ut p ut 2 S Po sitive (+ ) Co nne ct ion Ri g[...]
-
Page 12
12 Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective T erminal Connection Covers have been installed. Failure to observe this could result in Electric Shock. There are two different ways of operating the MC252 mon- a[...]
-
Page 13
13 How to Connect in Mono Bi-Amp (Parallel) Mode M ono B i - A m p (P ar al le l ) H o okup C onne ct ion s Loudspe ak e r I mpe danc e Loudspe ak e r Negat i v e (- ) Connect ion Loudspe ak e r P os it iv e (+ ) C onnect ion 1 S (O h m ) Lef t and R ig ht O ut p ut 2 S N eg at iv e (- ) Co nn ect io n Lef t and R ig ht O ut p ut 2 S Po siti v e (+[...]
-
Page 14
14 Front Panel Displays and Controls METER indicates the Power Output of the Left Channel Amplifier METER Switch selects the display modes of the Power Output Meter POWER GUARD LED lights when the amplifier Right Channel POWER GUARD circuit activates POWER Switch T urns AC power On/Off, or On/Remote Remote On Indicator lights when the amplifier is [...]
-
Page 15
15 How to Operate How to Operate Power On T o have the MC252 automatically turn On or Off when a control center turns on or off , rotate the power switch to the remote position. For manual op- eration, rotate the power switch to the On or Off position as de- sired. Refer to figure 10. Note: Ther e must be a power control connection between the MC25[...]
-
Page 16
16 T echnical Description McIntosh Laboratory , the company who introduced the world’ s first amplifier that could be called “High Fidelity”, has done it again. The McIntosh engineering staff has cre- ated a power amplifier without compromise, using the most advanced McIntosh circuit design concepts. A continuous average power output rating o[...]
-
Page 17
17 T echnical Description rent gain over the entire current range they must cover . Output transistors in particular , have matched uniform cur- rent gain, high current-bandwidth product and large active region safe operating area. An automatic tracking bias sys- tem completely eliminates any trace of crossover distor- tion. Precision metal film re[...]
-
Page 18
18 Figure 19 W ith Power Guard Figure 18 W ithout Power Guard Figure 17 Input T est Signal Figure 16 lower than optimum, causes more output current to flow , which results in extra heat being generated in the power output stage. This increase in temperature will result in a reduced life expectancy for the amplifier . The Autoformer creates an ideal[...]
-
Page 19
19 T echnical Description, con’t tronic attenuator at the amplifier input reduces the input volume just enough to prevent any further increase in dis- tortion. The Power Guard circuit acts so fast that there are absolutely no audible side effects and the sonic purity of the music reproduction is perfectly preserved. The MC252 Power Amplifier with[...]
-
Page 20
20[...]
-
Page 21
21 Notes[...]
-
Page 22
22 Specifications Specifications Power Output S tereo Minimum sine wave continuous average power output per channel, all channels operating is: 250 watts into 2 ohm load 250 watts into 4 ohm load 250 watts into 8 ohm load Power Output Mono Bridged Minimum sine wave continuous average power output is: 500 watts into 4 ohm load 500 watts into 8 ohm l[...]
-
Page 23
23 Packing Instructions Packing Instructions Quantity Part Number Description 1 034256 Shipping carton only 2 034250 Foam end cap 1 034198 Inner carton top 1 034199 Inner carton bottom 1 034188 Foam pad 1 034037 Inner carton pad 1 033699 Shipping skid 7 017218 Plastic foot 4 100159 #10-32 x 3/4” Machine screw 2 104083 #10 x 7/16” Flat washer 3 [...]
-
Page 24
McIntosh Part No. 040815 McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice. Printed in the U.S.A.[...]