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McIntosh MC-2505 - page 1
MC250 5 SOLI D STAT E PRIC E $1.2 5 STERE O POWE R AMPLIFIE R MC25O 5 ...
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McIntosh MC-2505 - page 2
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McIntosh MC-2505 - page 3
Th e Mclntos h "wil l t o perfection " require s tha t w e prob e constantl y int o th e unknow n t o brin g th e performanc e o f ou r electroni c equipmen t close r t o perfectio n tha n eve r before . Thi s require s a constan t an d relentles s searc h fo r lo w noise , broa d ban d conservativ e desig n wit h a n eve r lowe r distort ...
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McIntosh MC-2505 - page 4
GENERA L DESCRIPTIO N Th e dramati c differenc e i n th e qualit y o f musi c reproduce d throug h a Mclntos h instrumen t i s du e t o lo w distortion . Th e distortio n o f you r MC250 5 i s guarantee d t o b e les s tha n 0.25 % a t an y frequenc y fro m 2 0 H z t o 2 0 kH z wit h bot h channel s operatin g a t 5 0 watt s RMS . Distortio n i s m ...
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McIntosh MC-2505 - page 5
Th e outpu t stage s ar e matche d t o th e loa d b y th e Mclntos h auto - former . Th e Mclntos h autoforme r i s carefull y woun d usin g Mcln - tos h trifila r windin g an d interleavin g techniques . Trifila r windin g an d interleavin g give s th e transformer s exceptiona l bandwidth . Th e autoformer s properl y matc h th e powe r transisto ...
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McIntosh MC-2505 - page 6
Ordinar y meter s lac k th e capabilit y o f indicatin g th e shor t interva l powe r i n a soun d wave . Th e mas s o f th e mete r movemen t i s to o grea t t o re - spon d t o instantaneou s change s i n musi c pro - gra m material . Mclntos h superio r engineerin g ha s develope d ne w circuitr y tha t permit s th e meter s o n th e MC250 5 t o ...
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McIntosh MC-2505 - page 7
RELATIV E OUTPU T LEVE L I N d B RELATIV E OUTPU T LEVE L I N d B 2 0 10 0 IDEA L RIA A SYSTE M RESPONS E USIN G CB S ST R 10 0 TES T RECOR D FREQUENC Y I N H z 1 k 10 k 20k 4 2 0 - 2 - 4 - 6 - 8 -1 0 -1 2 1 4 -1 6 -1 3 -20 IDEA L RIA A SYSTE M RESPONS E USIN G CB S ST R 10 0 TES T RECOR D 2 0 100 FREQUENC Y I N H z 1 k 10 k 20 k 4 2 0 -2 - 4 - 6 - ...
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McIntosh MC-2505 - page 8
RELATIV E OUTPU T LEVE L I N d B RELATIV E OUTPU T LEVE L I N d B 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 4 2 0 - 2 -4 -6 -8 -10 -12 -14 -16 -18 -20 20 k 10 k 1 k FREQUENC Y I N H z IDEA L RIA A SYSTE M RESPONS E USIN G CB S ST R 10 0 TES T RECOR D 2 0 IDEA L RIA A SYSTE M RESPONS E USIN G CB S ST R 10 0 TES T RECOR D 6 20 100 10 0 FREQUENC Y I N ...
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McIntosh MC-2505 - page 9
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McIntosh MC-2505 - page 10
TYPICA L PERFORMANC E DAT A HARMONI C DISTORTIO N v s POWE R OUTPU T FREQUENC Y I N HERT Z 1 k 10 k 100 k 10 0 100 0 1 0 PERCENTAG E INTERMODULATIO N DISTORTIO N 0. 6 0. 5 0. 4 0. 3 0. 2 0. 1 1 0 POWE R OUTPU T I N EQUIVALEN T RM S WATT S 8 POWE R OUTPU T I N RM S WATT S 2 0 H z 2kH z 20kH z 10 0 1 0 PERCENTAG E HARMONI C DISTORTIO N 0. 6 0.5 0. 4 ...
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McIntosh MC-2505 - page 11
SPECIFICATION S POWE R OUTPUT : STEREO — 5 0 RM S watt s continuou s pe r chan - ne l int o 4 , 8 , o r 1 6 ohm s bot h channel s oper - ating . HARMONI C DISTORTION : STEREO—Les s tha n 0.25 % a t 5 0 watt s outpu t fro m 2 0 H z t o 2 0 kH z bot h channel s operating . Typica l performanc e i s les s tha n 0.1 % a t rate d power . Distortio n ...
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McIntosh MC-2505 - page 12
I F YOU'R E I N A HURR Y POWE R OF F O N Turn s th e amplifie r on/off . SPEAKE R OF F O N Turn s th e speake r o n / off . HEADPHON E T o connec t a se t o f lo w impedanc e stere o headphones . METE R RANG E Adjus t mete r reading s t o powe r outpu t level . 1 0 ...
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McIntosh MC-2505 - page 13
INSTALLATIO N Adequat e ventilatio n extend s th e trouble-fre e lif e o f electroni c instruments . I t i s generall y foun d tha t eac h 10 ° centigrad e (18 ° F ) ris e i n temperatur e reduce s th e lif e o f electrica l insulatio n b y on e half . Adequat e ventilatio n i s a n inexpensiv e an d effectiv e mean s o f pre - ventin g insulatio ...
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McIntosh MC-2505 - page 14
TYPICA L HOO K U P T O 11 7 V A C OUTLE T ALTERNAT E SPEAKE R LEA D CONNECTIO N T O B E USE D WHE N PHAS E SWITC H AN D PHON E JAC K O N C2 4 AR E T O B E USED . 1 2 TUNE R ROTATO R DIRECTIONA L F M ANTENN A PREAMPLIFIE R MC250 5 POWE R AMPLIFIE R A C LIN E A C LIN E ...
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McIntosh MC-2505 - page 15
CONNECTIN G TH E MC250 5 INPUT-STERE O Th e shielde d cabl e fro m th e lef t outpu t o f th e Mclntos h preamplifie r i s plugge d int o th e lef t jack . Th e shielde d cabl e fro m th e righ t outpu t o f th e Mclntos h preamplifie r i s plugge d int o th e righ t jack . SPEAKER S Speaker s ar e connecte d a t th e barrie r strip s marke d OUT - ...
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McIntosh MC-2505 - page 16
BLOC K DIAGRA M 1 4 ...
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McIntosh MC-2505 - page 17
OPERATIN G TH E M C 250 5 STERE O AMPLIFIE R LEF T GAI N Us e th e lef t gai n contro l t o adjus t th e volum e i n th e lef t channe l t o th e desire d listenin g level . Tur n th e contro l clockwis e t o increas e th e volume . RIGH T GAI N Us e th e righ t gai n contro l t o adjus t th e volum e i n th e righ t channe l t o th e desire d list ...
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McIntosh MC-2505 - page 18
A n applicatio n fo r a FRE E 3 YEA R FACTOR Y SERVIC E CONTRAC T i s include d i n th e pac k wit h thi s manual . Th e FRE E 3 YEA R FAC - TOR Y SERVIC E CONTRAC T wil l b e issue d b y Mclntos h Laborator y upo n receip t o f th e completel y fille d ou t applicatio n form . Th e term s o f th e contrac t are : 1 . Transportatio n charge s ar e ...
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McIntosh MC-2505 - page 19
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McIntosh MC-2505 - page 20
MclNTOS H LABORATOR Y INC . 2 CHAMBER S ST. , BINGHAMTON , N . Y . 1390 3 607-723-351 2 Desig n subjec t t o chang e withou t notice . Printe d i n U.S.A . 038-34 1 BE04200 3 ...
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