McIntosh MC-2255 manual

TH E MclNTOS H M C 225 5 SOLI D STAT E STERE O POWE R AMPLIFIE R Readin g Time : 3 1 Minute s Pric e $2.0 0[...]

VARIOU S REGULATOR Y AGENCIE S REQUIR E THA T W E BRIN G TH E FOLLOWIN G INFORMATION T O YOU R ATTENTION . PLEAS E REA D I T CAREFULLY . WARNING : T O PREVEN T FIR E O R SHOC K HAZARD , D O NO T EXPOS E THI S UNI T T O RAI N O R MOISTURE . Th e Mclntos h yo u hav e purchase d i s a Mode l M C 2255 . I t ha s a seria l numbe r locate d o n th e rea [...]

You r M C 225 5 Stere o Powe r Amplifie r wil l giv e yo u man y year s o f pleasan t an d satisfactor y performance . I f yo u hav e an y questions , pleas e contact : CUSTOME R SERVIC E Mclntos h Laborator y Inc . 2 Chamber s Stree t Binghamton , Ne w Yor k 1390 3 Phone : 607-723-351 2 Tak e Advantag e o f 3 year s o f Contrac t Service.. . Fil l[...]

Ho w t o Connec t INPU T STERE O OPERATIO N Us e shielde d cable s t o connec t th e signa l fro m th e preamplifie r o r signa l sourc e t o th e powe r amplifier . T o minimiz e th e possibilt y o f hu m th e shielde d cable s shoul d b e ru n paralle l t o eac h othe r o r loosel y twiste d together . Locat e th e cable s awa y fro m speake r le[...]

anothe r lea d fro m th e othe r termina l o f th e loudspeake r t o th e lef t outpu t termina l marke d fo r th e impedanc e o f th e speake r o n th e LEF T OUTPU T termina l strip . Th e righ t channe l speake r i s con - necte d i n th e sam e manne r t o th e RIGH T OUTPU T termina l strip . Whe n multipl e speaker s ar e t o b e connecte d t[...]

Stereophoni c Connection s RIGH T SPEAKE R MUS T B E I N STERE O POSITIO N FO R STERE O PROGRAM S 6 LEF T SPEAKE R PROGRA M SOURC E[...]

Mono-Bridg e Connection s (CONNECTION S FO R 8 OH M SPEAKE R ILLUSTRATED ) CONNECTION S SHOW N FO R MON O WHE N MOD E SWITC H I S I N TH E MONO-BRIDG E POSITIO N SPEAKE R 7 PROGRA M SOURC E[...]

Mono-Paralle l Connection s (CONNECTION S FO R 4 OH M SPEAKE R ILLUSTRATED ) SPEAKE R CONNECTION S SHOW N FO R MON O WHE N MOD E SWITC H I S I N TH E MONO-PARALLE L POSITIO N 8 PROGRA M SOURC E[...]

Th e Fron t Pane l Control s an d Ho w t o Us e The m METER S Outpu t powe r monito r meter s indicat e th e outpu t powe r o f eac h channel . Eac h mete r ha s tw o primar y scales : WATT S an d DECIBELS . Whe n th e METE R RANG E switc h i s i n on e o f th e decibe l (dB ) posi - tions , pea k signa l reading s ar e indicate d o n th e lowe r D[...]

WATT S POWE R I n th e WATT S positio n th e meter' s primar y calibra - tio n i s fro m .002 5 watt s (tw o an d a hal f milliwatts) , u p t o 25 0 watts , th e rate d powe r outpu t o f th e M C 2255 . Th e meter i s calibrate d fo r 50 0 watt s a t th e righ t han d en d o f th e mete r scale . Whil e th e M C 225 5 canno t reac h thi s pow[...]

Rea r Pane l informatio n MOD E SWITC H Th e M C 225 5 wil l operat e i n thre e modes , Stereo , Mon o Bridge , an d Mon o Parallel . Th e Mon o mode s diffe r i n th e load s the y wil l driv e an d th e connectio n sequenc e t o th e speake r terminals . LEF T an d RIGH T OUTPU T TERMINAL S Fo r stere o operation , outpu t impedance s o f 1 , 2 [...]

Performanc e Limit s PERFORMANC E GUARANTE E Performanc e Limit s ar e th e maximu m deviatio n fro m perfectio n permitte d fo r a Mclntos h instru - ment . W e promis e yo u th e M C 225 5 yo u bu y mus t b e capabl e o f performanc e a t o r exceedin g thes e limit s o r yo u ge t you r mone y back . Mclntos h i s th e onl y manufacture r tha t [...]

Performanc e Chart s PERFORMANC E CHART S AR E FO R ON E STERE O CHANNE L WIT H BOT H CHANNEL S OPERATING . MON O OPERATIO N I S IDENTICA L EXCEP T POWE R I S DOUBLE D FO R TH E SINGL E MON O OUTPUT . 1 3 FREQUENC Y I N H z FREQUENC Y I N H z FREQUENC Y I N H z[...]

1 4 POWE R I N WATT S FREQUENC Y I N H z[...]

Technica l Descriptio n INPU T AMPLIFIE R Eac h channe l inpu t contain s a complet e seve n transisto r lo w powe r amplifier . A differentia l tran - sisto r pai r provide s hig h inpu t impedanc e an d lo w noise . Th e differentia l signal s ar e combine d i n a cur - ren t mirro r circui t whic h drive s a clas s A amplifie r stage . Th e foll[...]

circui t als o illuminate s re d LIMI T indicato r lamp s whe n th e amplifie r i s drive n beyon d it s maximu m outpu t capacity . Powe r Guar d prevent s loudspeake r damag e an d eliminate s hars h outpu t distortio n cause d b y amplifie r clipping . Th e Powe r Guar d circui t consist s o f a wavefor m comparato r whic h monitor s th e wav e [...]

Bloc k Diagra m 1 7[...]

MclNTOS H LABORATOR Y INC . 2 CHAMBER S ST. , BINGHAMTON , N.Y . 1390 3 607-723-351 2 Th e continuou s improvemen t o f it s product s i s th e polic y o f Mclntos h Laborator y Incorporate d wh o reserv e th e righ t t o improv e desig n withou t notice . Printe d i n U.S.A . 03925 8[...]