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McIntosh MC-452 - page 1
McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, New Y ork 13903-2699 Phone: 607-723-3512 www .mcintoshlabs.com MC452 Quad Balanced Power Amplier Owner ’ s Manual ...
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McIntosh MC-452 - page 2
2 The lightning ash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s en- closure that may be of sufcient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to ale ...
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McIntosh MC-452 - page 3
3 Si x foot , 2 con duc tor shield ed , with t wo 1 /8 inch stere o mini phon e plugs. 2. F or a ddit ional conne ction in form ation, refer to the owner’ s ma nual( s ) for any component( s ) conne cted to the MC4 5 2. 3 . The MC4 5 2 mutes the spe aker out put fo r approxi- mately two seconds when f i r st t u r ned on. 4. F or the best p er fo ...
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McIntosh MC-452 - page 4
4 Cable Information, I ntroduct ion and Perfor mance Features X LR Connectors Bel ow is the Pin con f i g u r ation fo r t he XLR Bala nced Input, I nput /Out put Connect ors on t he MC4 5 2. Ref er to the d iag ra m for connect ion: P I N 1 : Shield/Grou nd P I N 2: + Input/Out put P I N 3 : - Input /Out put P ow er Con trol Connector The MC4 5 2 ...
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McIntosh MC-452 - page 5
5 Dimensions The fo llowing d imen sions can assist i n deter mi n ing the best locat ion f or your MC4 5 2. Dimensions Front V iew of the MC452 Rear V iew of the MC452 Side V iew of the MC452 17- 1/2 " 44.45cm 8- 7/8 " 22.54cm 9- 7/16 " 23.97cm 11 - 3/4 " 29.85cm 16 -13/16 " 42.70cm 20- 3/16 " 51.27cm 3/16 " 0.48 ...
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McIntosh MC-452 - page 6
6 Installation Installation The MC4 5 2 can be placed upr i g ht on a table o r she lf, st a ndi ng on its fo u r feet. It also can be custom in st alled i n a pi ece of f u r n it u re or cabinet of y ou r cho ice. The fo u r feet may be remo ved f rom the bot tom o f t he MC4 5 2 when it is custom i nst alled a s outlined bel ow . T he fo u r fee ...
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McIntosh MC-452 - page 7
7 Cau t ion: The Loud sp ea ke r Negat i ve Connec t i ons a re ab ove cha ss i s gro und . Do not c ombi ne any co nnec t ion s toge the r, ground t he m or conn ec t wi th a not her MC45 2 . Con ne ct t he MC4 5 2 power cord to a l ive A C outlet. Refer to t he rea r pa nel to det er mi ne the cor rec t vo lta ge PO W ER CONTRO L I N receives t u ...
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McIntosh MC-452 - page 8
8 How to Co nnec t Th is McIntosh M C45 2 Qu ad Bala nced Po wer Ampli- f ier is designed for Loudspe aker s with a n i mped a nce o f 2 oh ms, 4 oh ms or 8 oh ms. Con ne ct a single Loud- spea ker only to t he R ight and Left O ut put T er mi nals. W hen con nec ti ng Louds pea kers to t he MC4 5 2 it is ver y imp or t a nt to use cables o f a deq ...
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McIntosh MC-452 - page 9
9 1 0. Connect t he Louds pea ker hookup cables to the MC4 5 2 Negativ e Out put T er mi nal a nd Pos itiv e Out put T er mi nal i ndent if ied a s 2Ω ( oh ms ), 4Ω ( ohm s ) or 8Ω ( ohm s ) con nect ion to match the impe d ance of the Loudsp ea ker , b eing ca refu l to obser ve the cor re ct polar ities. In ser t the spade lug con nector or pr ...
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McIntosh MC-452 - page 10
10 Th is McIntosh M C45 2 Qu ad Bala nced Po wer Ampli- f ier is designed for Loudspe aker s with a n i mped a nce o f 2 oh ms, 4 oh ms or 8 oh ms. Con ne ct a single Loud- spea ker only to t he R ight and Left O ut put T er mi nals. W hen con nec ti ng Louds pea kers to t he MC4 5 2 it is ver y imp or t a nt to use cables o f a dequ ate size, so t ...
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McIntosh MC-452 - page 11
11 W A R NI NG: Louds pe ak er t er mina ls a re ha za rd - ous l ive and p re se nt a r is k of el ec t ric shoc k . For ad di t iona l in s tr uc ti on on mak ing Loud s pea ke r Conne ct i ons con - tac t you r McIntos h Dea le r or McIn- tos h T ech nic al Su pp or t . 1 4. Att a ch the T er m i nal Con nections Cov er s to t he MC4 5 2 Rear Pa ...
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McIntosh MC-452 - page 12
12 F ront Panel Display s and Controls Sta ndby Po wer On I nd icator PO W ER Switch T u r ns A C Po wer Of f, Remote, A C Po wer On MET ER Swit ch selects the d isplay modes of the Po wer Out put Met er a nd Meter I llu m i nat ion Meter i nd icate s the R ight Cha n nel O ut put of the amplif ier LED ind icate s when t he Lef t Cha n nel A mplif ...
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McIntosh MC-452 - page 13
13 How to Operate How to Operate Input M ode Switch The I nput Mode S witch, wh ich is l ocated on t he Rear Panel o f t he MC4 52, allo ws sel ect ion o f either the Bal- anced or Unbalanced I nput. Re fer to f igu re 1 1 . P ow er On T o hav e the MC4 5 2 automatically t u r n On or Of f when a control center t u r ns on or off, rotate t he pow e ...
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McIntosh MC-452 - page 14
14 Mc Intosh Labor ator y , t he company who int roduced the wor ld ’ s f i r st amplif ier that could be called “H igh F ide lit y” , h as done it again. T he Mc I ntosh engi neer i ng staf f ha s cre ated a pow er a mplif ier without compro- mise, usi ng the most advanced McIntosh circuit design conce pt s. The MC4 5 2 has a cont inuous ave ...
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McIntosh MC-452 - page 15
15 opti mum , causes more output cu r - rent to f lo w , which resu lts in ext r a heat being gener ated i n the pow er out put stage. Th is i ncrea se in t empe rat u re w ill resu lt in a reduce d life expect ancy for the a mplif ier . The sp ecial Balanced Wind i ng Au tof or me r cre - ates a n ideal match bet ween the power amplif ier ou t put ...
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McIntosh MC-452 - page 16
16 an a mplif ier cha n nel is ov e rd r iv en , the re wi ll be a dif ference bet ween t he t wo s igna l wav eform s. W hen t he dif ference ex ceed s 0.3 % , t he P ow er Gu ard a ctivates t he PG light and a dy na m ic el ect ronic att enuator at the amplif ier input reduces t he input vo lume just enough to p reven t any f u r ther i ncrea se ...
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McIntosh MC-452 - page 17
17 ov e r 20 amps of cur rent. Re fer to f ig u re 23 (go l f ball is fo r size compa rsion ). It is enc losed in t he le genda r y Mc Intosh Po t te d Encl o - su res a nd we ighs 30lbs. The fo u r supe r size mai n f ilter capacitors can st ore ov e r 200 Joules o f energ y for both amplif ier chan nels, necessa r y for the wide dy na mic ra nge ...
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McIntosh MC-452 - page 18
18 Specic ations Specic ations P ow er Output Mi n imu m sine wav e conti nuous av erage pow er out put per cha n nel, with both cha n nels operat i ng is : 4 50 watt s i nto 2 ohm load 4 50 watt s i nto 4 ohm load 4 50 watt s i nto 8 ohm load Output Load Impedance 2, 4 or 8 oh ms Rated Po wer Ban d 20Hz to 20,000H z T otal Har monic Distor t ...
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McIntosh MC-452 - page 19
19 Packing Instructions Packing Instructions In t he event i t is necessa r y to repa ck the equipment for shipment, the equ ipment must be packed exactly as sho w n belo w . It is v er y impor ta nt that t he fo u r plastic feet are at t ached to t he bott om o f the e quipment. F ou r 1 / 4 - 20x 2- 1/ 4 i nch screws and washer s must be use d to ...
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McIntosh MC-452 - page 20
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. McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, NY 13903 www .mcintoshlabs.com McIntosh Part No. 04122600 ...
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