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OWNER'S MANUAL

PREMIER FOUR

VACUUM TUBE POWER AMPLIFIER

conrad-johnson design, inc.

703-698-8581

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Содержание Premier Four

Страница 1: ...OWNER S MANUAL PREMIER FOUR VACUUM TUBE POWER AMPLIFIER conrad johnson design inc 703 698 8581 ...

Страница 2: ...elity audio equipment with a reference quality amplifier Its unique circuit design embodies the results of 10 man years of research into the technology of the reproduction of recorded music The design has been uncompromisingly executed in the finest available component parts and each unit painstakingly assembled and tested to insure enduring sonic excellence and trouble free operation Please take ...

Страница 3: ...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 conrad johnson design inc within 30 days of the original purchase and that the registered owner provides the factory with a signed notice giving the new owner s name and address and the model and serial...

Страница 4: ...utput stage utilizes paralleled EL34s a total of four per channel This stage features ultralinear operation which permits high power levels while greatly reducing the source impedance of the stage As a result the amplifier is capable of supplying the large current demands of high amplitude musical transients driven into reactive speaker loads A substantial main power supply of nearly 2 000 microfa...

Страница 5: ...h front and back For more restricted installations cooling fans are essential The front panel of the Premier Four will fit in a standard 19 equipment rack and is designed to carry the weight of the unit so that it may be rack mounted Again it is important that adequate clearance be provided above the Premier Four so that ventilation is not impeded About eight inches of the front of the rack should...

Страница 6: ...e same coded terminal on 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 the voice should be clearly focused between the two speakers With the speakers connected out of phase the voice will be diffused with no identifiable source Relative phase may b...

Страница 7: ...n occurs in either your pre preamplifier the HV 1 is inverting or in your preamplifier phono stage but not both Making the correction at the cartridge will then permit phase correct tape recording and playback If you do not know the phase of each component in your system try listening with your speakers hooked up both ways When correctly phased plucked strings and other sharp transients will sound...

Страница 8: ...Tube locations Tube complement V1 V2 5751 V3 V4 6FQ7 6CG7 V5 V12 EL34 V1 V2 V3 V4 V5 V7 V9 V11 V6 V8 V10 V12 ...

Страница 9: ...rformance of your Premier Four 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 two years of operation without degradation in normal use We highly recommend that when the time comes to replace the vacuum tubes you purchase replacement tube sets from conrad ...

Страница 10: ...just described should be repeated NOTE It is normal for these LEDs to flash or flicker when the amplifier is in use This is normal and no cause for alarm This biasing procedure should be performed whenever the amplifier s output tubes are replaced and also after each six months of average use Fuse The AC line is fused to protect the power transformer This fuse will not fail in normal operation Fai...

Страница 11: ...otal harmonic distortion or intermodulation distortion Sensitivity 875mv to full power Small Signal Distortion less than 05 at midband Phase Phase correct non inverting Frequency Response 20Hz to 20kHz 0 5 db Hum and Noise 96 db below full power output Input Impedance 100k ohms Dimensions 20 x 19 x 9 Weight 80 lbs ...

Страница 12: ...onrad johnson design inc 2733 Merrilee Drive Fairfax VA 22031 Be sure to enclose a note explaining the problem you are having in as much detail as possible If the problem is intermittent please indicate If you do not have the original packing material replacements are available from conrad johnson design If you have any questions about service or other questions about operation of your Premier Fou...

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