Krell Industries MDA-300 Owner'S Reference Manual Download | Manualshive

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Summary of Contents for MDA-300

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Page 2: ...r _ a different function Asyou read throughthis O w ners Referenceyouwill become better acquaintedwith the features andfunctions that makethe MDA 300 500s a superb value A Question and Answer section is also included whereanswersto com monquestions are provided Should youhave any ques tions or suggestionsplease feel free to contact yourau thorized dealer or the KRELL staff for assistance In the un...

Page 3: ...G AND ASSEMBLY BASIC INSTALLATION AND OPERATION INPUT AND OUTPUT CONNECTIONS 8 AMPLIFIER OPERATION 9 PROTECTION CIRCUITRY 10 REAR PANEL DES CRIPTIONS 12 QUESTIONS AND ANSWERS 14 SPECIFICATIONS 15 WARRANTYAND SERVICE INFORMATION 3 ...

Page 4: ...y onto its handlesandre movethe second piece of foam Thefollowing items will nowbe visible in each box 1 MDA 300 500 monaural amplifier 1 Warrantycard 1 ACpower cord 4 or 5 Rubberbottoms MDA 500 has 5 feet NOTE If any of these items are not included please contact your authorized dealer immediatelyf6r assis tance 6 Remove the plastic bag fromthe amplifier 7 Repeatprocedurefor the secondamplifier N...

Page 5: ...erally with the front andrear of a cabinet open 2 3 inches of clearance oneach side and8 inches of clear ance abovethe amplifiers should provide adequate venti lation The exact dimensions for the MDA 300 and MDA 500 are in the Specifications Sectionbelow 3 The MDA 300 500s should have a dedicated 20 amp line for each amplifier and shouldonly be operatedwith the powercords supplied Use of other pow...

Page 6: ...cold solderjoints 2 Connectthe interconnect cables fromyour preampli fier to the input of each MDA 300 500 Thewiring to andfromthe amplifiers and all compo nents in general shouldbe arrangedin a neat organized manner Specifically ACwires should be separated from audio wires This practice avoids humor ottier unwanted noise frombeing inducedinto the system The MDA 300 500s have balanced and single e...

Page 7: ...ch channel is wired_in parallel with pin 2 the non inv erted input Only one ot these inputs Shouldbe connectecl to a preamplifier 3 Insert the ACpow6rcord into the receptacle located on the back of eachMDA 300 500 Insert tile other end into the wall ACreceptacle Refer to section C Basic Instal lation and Operation for ACpower requirements 7 ...

Page 8: ...ry e asy Equallyimportantis an understandingof the care that should be exercised whenoperating the systemas a whole in relation to the enormous poweroutput of the MDA 300 500s Simple mistakes such as switching betweenactive sources without mutingthe preampfifier 9utput or bumping miscuing a cartridge can generate large transients at lowfrequencies Withthis type of transient the MDA 300 500s can ge...

Page 9: ...ection circuitry is designedto avoiddamage to the amplifiers or speakerscausedbyother d efecti e components faulty wiring mishandlingof the systemoy amplifierfailure When the protection circuit is engage l the a mplifierswill shut off andshort tlaeir output After resolving either the input or output problemthe amplifi ers can15eturnedon Theamplifiers also havecircuit breakers ontheir backpanelfor ...

Page 10: ... 3 pin XER connector Single ended via RCA connector XLR PIN CONFIGURATION p n 1 Shield ground p ln 2 Non invertingor 0 degrees hot pan3 Inverting or 1 80 degrees OUTPUT Two pairs of five waybinding posts in parallel OTHER Standard ACreceptacle 20 ampcircuit breaker OPTIONS Black Faceplate 11 ...

Page 11: ... or Krell industries Q When I turn the amplifier on there is a loud hum through the speakers There wasnever a humbefore the MDA 300 500 was in the system Whatshould I do A Often whena newcomponentis introduced into an audio systema hummay15ec ome present This is often causedby_a groundloop in tlae system _Tryputting a 3 prong to 2 prongACadaptor cheate r plug on the powercord lifting the groundfro...

Page 12: ... or Krell Q I tried a newpreamplifier in myaudio system and whenI turned the unit on the MDA 300 500 shut off Is the amplifier defective A Morethan likely the amplifier is not defective When connecting components you should always keep the amplifier off Tile amplifer sensed a bad input signal and slaut off protecting itself and the speakers There also could tiave been a bad cable connection or exc...

Page 13: ...ts 1 ohm 2400watts DIMENSIONS 19 0 WIDE 9 5 DEEP with handles 8 5 HIGH with feet SHIPPING WEIGHT 105 pounds MDA 500 GAIN 26dB SIGNAL TO NOISE 106dBunweighted THD 1Kat 8 ohms less than 2 20Kat 8 ohms less then 5 INPUT IMPEDANCE 47 000 ohms 47K INPUT SENSITIVITY 3 2 volts for 500watts out OUTPUT IMPEDANCE 15ohms OUTPUT VOLTAGE 179volts peakto peak OUTPUT POWER All readings are continuous output powe...

Page 14: ...tallation andoperation are completed Thewarrantyfor Krell productsis valid n in t he coun try to whichthey wereoriginally shippedandat tlae factory If youtfiink there are problems with yourunit pleasecontact yourdealer distributor or the factory immediately Plea s edonot returl anyunit to KRELL for repair with out first calling to discussthe problem andto ot tain a R etu rn Authorization number Fr...

Page 15: ...KRELL INDUSTRIES 35 HIGGINSDRIVE MILFORD CT 06460 SALES203 874 3139 FAX203 878 8373 COPYRIGHT1992 KRELLINDUSTRIES MDA9204 ...

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