McIntosh C48 manual

McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, New Y ork 13903-2699 Phone: 607-723-3512 www .mcintoshlabs.com C48 Au dio P rea mpl ifier Owner ’ s Manual[...]

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 sufcient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to al[...]

3 Y ou r decision to o w n t his McIntosh C48 Audio Pre- amplif ier ran ks you a t t he v er y top a mong discr i m i- nati ng music listener s. Y ou now ha ve “The Best. ” T he Mc Intosh ded ication to “Qu alit y , ” is a ssu ra nce t hat yo u wi ll rec eiv e many year s o f musical enj oyment f rom th is u n it. P lease t a ke a sho r t t[...]

4 Data P or t Connectors The C 48 Data O ut P or t s send Remote Control S ign als to Sourc e Components. A 1/ 8 inch ster eo m in i phone p lug is used for con nection. General Infor mation and Connector Infor mation Connector and Cable Informat ion X LR Connectors Bel ow is the Pin con f i g u r ation fo r t he XLR Bala nced Input and O ut put Co[...]

5 Introduct ion Per formance Features Introduct ion and Per formance Features The McIntosh C48 A ud io Prea mplif ier is one o f t he f i nest P rea mplif iers ever cre ated. T he versat ile Prea m- plif ier provides con nect ions f or var ious i nput sources both a nalog and digital. T he C48 Out puts hav e the ability t o d r iv e multiple P ow e[...]

6 Dimensions Dimensions The fo llowing d imen sions can assist i n deter mi n ing the best locat ion f or your C 48. There is a dditional in form ation on the next page per t ai n ing to i n sta lli ng the C48 i nto cabinets. 17- 1/2 " 44.45cm 13 - 1/4 " 33.66cm 17- 1/8 " 43.50cm 3/16 " 0.48cm 13/16 " 2.06cm 10- 9/16 "[...]

7 Installation Installation The C 48 can be placed upr ight on a t abl e or she lf, sta ndi ng on its four feet. I t also ca n be cust om in- stal led in a piece of fu r nit 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 C48 when it is custom in sta lled as outli ned be - lo w . T he four feet together[...]

8 Rear P anel Connect ions The identif ication o f Rear Panel Connec tions for the C48 Audio Preamplif ier is located on a separ ate fo lded sheet contai ned i n the O w ner’ s Ma nual Packet. Re fer to sepa r ate sheet “ Mc2B ” for the Rear Panel Con ne ct ions. Rear P anel Connect ions C48 A udio Preamplif er Rear Pane l[...]

9 Connecting Components Connecting Components The C 48 has t he ability t o automatically switch pow er On / Of f to Sour ce Components via t he P ow er Cont rol con nect ions. The Data Por t Con nect ions allo w for the remote ope rat ion o f ba sic fu nct ions using t he C48 Remote Control. W ith an exte r nal sensor con nec ted to the C 48, remo[...]

10 Displays On Sc ree n Fu nct ions on t he Mc I ntosh Music Ser ver and a va r iet y of other McIntosh Comp onent s Remote Control P ush- But tons Pre ss t o Po wer the C 48 ON Selects one of the eight available A ud io Sour ces Selects a Di sc Play er, Music Ser ver or Recorde r Func tion. Se ek Sta - tions Up or Dow n t he A M / F M Dial. Select[...]

11 How to use the Remote Control How to use the Remote Control The supplied H R0 72 R emote Cont rol is capab le o f di rect ly controlling t he f u nct ions o f contempora r y Source Components c on necte d to t he C48 via t he Data Po r t s. Note: I f at any t im e the C48 see ms u nre spon sive to HR07 2 Rem ote Cont rol Co mma nd s pre ss the P[...]

12 IR Se ns or receives com ma nd s f rom a Remote Cont rol ST A N DB Y /O N Pu sh- but ton w ith ind icator, switches the C 48 ON or OFF ( Sta ndby ) and r eset s the m icrop roce ssor s V OLUM E C ont rol allows adjust me nt of the list en i ng leve l for both cha n nels Con ne ct ion for l ow imp ed a nce dy n am ic head phones, for pr ivate li [...]

13 Pu sh-butt on the Set up Menu wil l advance t o the next Men u Selection. Re fer to f igu re 3. 4. T o exit f rom the Set up Mode, press t he EQ B Y - P ASS/ SETU P P ush-but ton. T he LED abo ve the TR IM P u sh-button w ill ext i ng uish a nd the Fro nt Panel Disp lay will rever t ba ck to its nor mal d is- pla y . Re fer to f ig u re 1 . Y ou[...]

14 1 . Pre ss and hol d t he EQ B Y P ASS/S ETU P P u sh- button u nt il the Set up Mode is act ive . The n press the OUT PUT 2 / ME N U ► P u sh-button t o sel ect the Set up Menu item “SETU P: S OURCE IN PUT , TU N ER :R CA ” . Re fer to f igu re 4. 2. Rotate the I NPUT Cont rol unti l “CD2 : R CA ” appea rs on t he F ront Panel Infor m[...]

15 4. R otate t he I N PUT Cont rol unti l “LEV EL : SR V R _._ ” appe ar s on the Fron t Panel Infor mat ion Displa y . The il lust r ation in f igu re 1 0 i ndicates a - 2 .5dB dec rease i n t he SR V R Level to match the v olume lev el o f t he CD I nput. 5 . Rep eat ste p 4 for o the r Inputs w ith component source s con nect ed u ntil t he[...]

16 appea rs on t he F ront Panel Alphanumer ic Display . Re fer to f igu re 1 4. 3 . Pres s the EQ B Y P ASS/ SETU P P ush-but ton to exit the Set up Mode. 5 . Rotat e the V OLUM E/ ADJUST Con t rol unti l “ A c- tion: SO U R CE” appea rs. Ref er to f igu re 1 7 . 6. Then pres s the OUT PUT 2 / M EN U ► P u sh- button u nt il the Set up Menu [...]

17 C. Pre ss t he 3, 2, 4, 2 and 9 P ush -but ton s w ith i n 5 sec onds. D . T he “Mc” Pu sh- but ton f lashes t w ice. Note: T o re set the Re mote Con tr ol to nor mal code s pe r form s tep s A and B th en e nte r 3, 2, 4, 2 and 8 for ste p C . 5 . P res s the V OLUM E U P / D O W N Pu sh-butt on on the Remote Control to verif y proper ope [...]

18 P ow er On and Off The Red LED abov e the ST A N DB Y /ON Push-but ton lights to i ndicate t he C48 is i n Sta ndby mode . T o switch ON the C48, press t he S T A N DB Y /ON Push- button on t he F ront Pane l or the ( Po wer On ) Pu sh-butt on on the Remote Control. The C48 wi ll go th roug h a br ief star t up i nitial iz ation with t he F ront[...]

19 ance pe r form t he fo l lo wi ng: 1 . Pre ss the T R I M P u sh-button re peat edly on the Remote Control until “ B A LA NCE 0 d B” appear s on the Fro nt Panel Infor mation Display . Re fer to f ig u re 54. Note: The Front Panel T R I M Push -b ut ton toget her with the OUT PUT 1 / OUTPUT 2 / ◄ M EN U ► Push- b ut ton s ma y also be u [...]

20 Af t er approxim ately 4 seconds the A lphanume r ic Displa y ret u r ns to i ndicate the Sou rce Sel ect ion and V ol u me Level . Mono Pre ss the Fron t Panel M ON O Pu sh-butt on to change f rom Stereo to Mono Mode f or the cu r rently se lected I nput Source. T he LED abo ve the MO NO Push-but ton w ill i l- lum i nate. Re fer to f i g u re [...]

21 outputs ( Mai n , Out put 1 , O ut put 2 and Headphones ) ex cept t he R EC OUT PUT . T he Fron t Panel Infor ma- tion Displa y wi ll i ndicate t he Source Name and t he w ord M U TE i n place of the act u al vo lu me set t ing. Re fer to f igu re 70 . Pre ssing the Mute Pu sh-butt on a second ti me or adjusti ng the vo lume cont rol ( either t [...]

22 The il lust r ation to the r ight sho ws the f u nd a mental f requency r ange of acoustical musical inst r u ments and the hum an voi ce. I t also show s t he ra nge o f a djust ment o f f re quencies f or each of the Equ ali zer Cont rols o f the C48 at t he +6d B a nd - 6d B p oints. Passthr u W hen t he C48 is con necte d together with a McI[...]

23 Reset of Micropr oce ssors In t he u nl i ke ly ev ent t he controls o f the C 48 stop f u nc- tioni ng, the m icroprocessors ca n be re set by per form- ing t he f ollo wi ng: 1 . Pre ss and hol d t he S T A N DB Y /ON Push-but ton for approximately ten second s and t hen release. 2. T o switch the C 48 back on press the O n ST AN D - B Y /O N [...]

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26 Specif icat ions Specif icat ions Frequen cy Response +0, - 0.5 d B f rom 20Hz to 20,000H z +0, - 3dB f rom 1 5Hz t o 1 0 0, 0 00H z T otal Har monic Distor t ion 0. 0 02% from 20Hz t o 20, 00 0H z Rated Out put (Ma in ) 2.5V Unb ala nced , 5V Balance d Max imum V olt age Output 8V RMS Unbalanced, 1 6 V R MS Balance d Sensit iv it y ( for ra te [...]

27 Packi ng Instr uct ions Packi ng Instr uct ions 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 plas- tic feet are at t ached to t he bot tom o f t he equipment. Th is w ill e nsu re t he proper e quipment location on the b[...]

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. 04122801[...]