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McIntosh MC303 manual

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Table of contents for the manual

  • Page 1

    McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, New Y ork 13903-2699 Phone: 607-723-3512 www .mcintoshlabs.com MC303 Owner ’ s Manual P ow er Amp li f ier[...]

  • Page 2

    2 The lightning ash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “danger - ous voltage” within the product’s enclosure that may be of sufcient magnitude to constitute a risk of electric shock to persons. 1. Read these instructions. 2. Keep these instructions. 3. Heed all wa[...]

  • Page 3

    3 Thank Y ou Y our decisio n to own t his McIntosh M C3 03 P ow er A mpli- f ier ra n k s y ou at the ver y top among disc r im in ati ng musi c liste ners. Y ou no w have “The Best. ” T he Mc I ntosh dedica- tion to “Qu alit y , ” is assu ra nce t hat y ou will r eceiv e many years of musi cal enj oyment f rom th is u nit. P lease t ake a [...]

  • Page 4

    4 X LR Connectors Bel o w is the Pi n conf igu r ation f or the X LR Balanced I nput Con nectors on t he MC 30 3. R ef e r to t he diag ra m f or con- ne c t ion: P I N 1 : Shie ld/Grou nd P I N 2 : + Out put P I N 3 : - Out put P ow er Con trol Connector The MC3 03 ’ s P ower Control Inputs receive On /Off si g n als o f +5 v ol ts. A n add itio[...]

  • Page 5

    5 Dimensions Dimensions The fo llo wi ng di mensions can a ssist in deter mi n ing the best location f or y our MC30 3. There is add itional in forma - tion on the next page per t ai ni ng to in sta lli ng the MC3 03 into cabinet s. F15AH 125V 17- 3/4 " 45.09cm 10- 7/8 " 27.62cm 12- 3/8 " 31.43cm 18" 45.72cm 19- 1/2 " 49.50[...]

  • Page 6

    6 Installation Installation The MC3 03 can be placed upr ight on a tabl e or she lf, sta ndi ng on its f our feet. It also can be cu stom in stal led in a pi ece of fu r n it u re or cabinet o f yo ur choice . The four feet may be remov ed f rom t he bott om o f t he MC 30 3 when it is custom i nst alled a s outlined belo w . T he fo u r feet tog e[...]

  • Page 7

    7 F15AH 125V Rear P anel Connections and Swi tch Con nec t the MC30 3 power cord to a live A C outlet. Ref er to t he re ar panel to d eter m ine t he cor re ct vol tage PO W ER CONT RO L I N receives t u r n O n /Of f signal f rom a McIntosh comp onent and t he PO W ER CON TRO L OUT send s a t u r n O n /Off signa l to t he next Mc Int osh Com pon[...]

  • Page 8

    8 How to Co nnect for Center and Surround Channels the con nect ion o f a single Loudsp eaker pe r amplif ier chan nel, with a n impe da nce o f 2 ohm s, 4 ohm s or 8 oh m s. Note: The rem aining Amplif ier Lo ud spea ke r T er minals shou ld not be co nnec ted to a nothe r Lou dsp eak er. 6. Prepa re the L oudspea ker Hookup Cables that at t ach t[...]

  • Page 9

    9 How to Co nnect How to Co nnect for Lef t , Center and Right Channels Note : Th e remai ning Amplif ie r Lou ds peak er T e rmin als shou ld not be co nnec ted to a nothe r Lou dsp eak er. 6. Prepa re the L oudspea ker Hookup Cables that at t ach to the A mplif ier by choos ing one of the methods belo w: Bare w ire cable ends : Caref ul ly remo v[...]

  • Page 10

    10 F ront Panel Displa ys and Switches Sta ndby Po wer O n Ind icator Meter s i ndicate t he A mplif ier Po wer O ut put of Chan nels 1 - 3 LEDs i ndicat e when A mplif ie r Cha n nels 1 - 3 P O W ER GU A R D ci rcu its a ctivate PO W ER Sw itch T u r n s A C Pow e r On /Off, or O n / Re mot e MET ER Switch select s Meter I llu m in ation Auto ( O [...]

  • Page 11

    11 P ow er On T o hav e the MC3 03 automatically t u r n O n or Off when an A / V Cont rol Center or Prea mplif ier t u r ns on or off, rotate the pow er sw itch to the R EMOTE position. F or manual op erat ion, rotate t he pow e r switch to the ON or OFF posi tion as desi red. Ref e r to f ig u re 8. Note : T here m ust be a p ower co n- tr ol con[...]

  • Page 12

    12 T echnical Description In side Bott om View o f t he MC30 3 Mc I ntosh Laborator y , the company who int roduced the w orl d ’ s f i rst a mplif ier that cou ld be called “High Fi delit y” , has done it again. T he Mc I ntosh engi neer i ng st aff ha s cre - ated a pow er amplif ier without compromise, using the most advance d Mc I ntosh c[...]

  • Page 13

    13 ra nge o f music conditions with t he benef its o f lo wer dist or - tion and cooler operat ion. The MC3 03 can pro vide g reater t ha n 60 ampe res pe ak output cu r re nt to dr ive uneven speaker load s. Some poor spea ker designs have input imped ance t hat dip to 1 or 2 ohm s at var ious fre quencies and the MC3 03 has the out put cu r rent [...]

  • Page 14

    14 inc rease i n temp erat u re w ill res ult in a red uced life expect ancy for the amplif ier . The Auto fo r mer c reates a n ideal match bet ween the P ow er A mplif ier Out put Circuit r y a nd the Loudsp ea ker . The re is abso lutel y no per fo r ma nce li mit ation with an Au tof or mer . Its f requency re sponse f rom belo w 20H z to we l [...]

  • Page 15

    15 can store ov er 200 Joules of energy , for the th ree a mplif ier chan nels, necessa r y for the wide dy nam ic range “Digital Audio ” de mand s. Re fer to f igu re 22. The re is also a f ul ly regulate d lo w vo ltage pow e r supply to g ua ra ntee exce l lent s ignal t o no ise rat io . Ref e r to f igu re 22. Also, most o w ners desi re o[...]

  • Page 16

    16 T op View of the MC3 03[...]

  • Page 17

    17 Photos Rear View of the MC3 03 A ngle View o f t he MC30 3[...]

  • Page 18

    18 Specif ications Specif ications P ow er Out pu t Mi ni mum si ne wa ve con ti nuous av e rage pow e r output per chan nel, all chan nels oper ati ng: 300 watt s i nto a 2 ohm, 4 oh m or 8 ohm load Output Load Impedance 2, 4 or 8 oh ms Rated Po w er Band 20Hz to 20,000H z T otal Har monic Distor tion 0. 0 05 % ma xi mum h ar monic distor t ion at[...]

  • Page 19

    19 Packi ng Instr uctions Quan ti ty Par t Number De s c r ip t ion 1 03 4 1 05 Shipping car ton top 1 03 4 1 0 4 Shipping car ton bot tom 2 03 44 3 9 F oa m Pad ( top and bot tom ) 3 03 44 4 1 F oa m R ing 4 0 1 8 44 5 F eet Packi ng Instr uctions In t he ev ent it is necessar y to re pack the equ ipment f or shipment, the equ ipment must be packe[...]

  • 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. 04109800[...]