OWNER'S MANUAL
MV45A AND MV75A
VACUUM TUBE POWER AMPLIFIERS
conrad-johnson design, inc.
(703) 698-8581
Page 1: ...OWNER S MANUAL MV45A AND MV75A VACUUM TUBE POWER AMPLIFIERS conrad johnson design inc 703 698 8581...
Page 2: ...today You will find your amplifier capable of reproducing with great accuracy the dynamics tonalities and textures of a live musical performance The design and materials have been carefully selected t...
Page 3: ...he factory d Normal wear and maintenance are not covered by this warranty 3 The above warranty may be transferred to subsequent owners provided that the warranty registration card has been returned to...
Page 4: ...ay be returned to the factory for service All equipment serviced at the factory will perform to its published specifications when returned Factory service will be offered at reasonable rates Transfera...
Page 5: ...of high current triodes to provide balanced low impedance drive to the push pull output stage This stage features ultralinear operation which permits high power levels while greatly reducing the sourc...
Page 6: ...ld be open at both front and back For more restricted installations cooling fans are essential Optional panels are available to facilitate rack mount installation Again it is important that adequate c...
Page 7: ...n each speaker In phase connection of the speakers can be readily ascertained by ear With the preamplifier mode switch in the MONO position play a record of a solo vocalist With the speakers in phase...
Page 8: ...nominal impedance of your speakers with the amplifier output taps will not necessarily guarantee optimum performance The sound with a given set of speakers will vary with the different impedance taps...
Page 9: ...mplifier Also the tubes in your amplifier have been tempered by a controlled burn in procedure that permits them to perform for a greatly extended period without sonic degradation We anticipate one to...
Page 10: ...Tube locations Tube complement MV75A MV45A V1 5751 5751 V2 V3 6FQ7 6CG7 12AT7 V4 V7 6550 6CA7 EL34...
Page 11: ...river adjustable controls marked with a p in the diagram counterclockwise until the associated indicator LED just goes off Clockwise rotation may be necessary first to turn the LED on do not turn the...
Page 12: ...Phase Phase correct non inverting Frequency Response 20Hz to 20kHz to 5db Hum and Noise 100 db below full power output Input Impedance 100k ohms Dimensions 15 x 10 x 9 Weight 43 lbs MV45A Power 45 wat...
Page 13: ...MV75A only The power supply to the output stages of the MV75A are fused to prevent damage to the amplifier in the event of failure of an output tube The fuse holders are located adjacent to the outpu...
Page 14: ...and the set of tubes must be packed in the original factory carton and packing materials The amplifier should be shipped without its rackplate and cover To ship the amplifier MV45A remove the protect...
