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Congratulations on your purchase of the conrad-johnson Premier Seven
vacuum tube preamplifier. You have acquired one of the finest pieces of
musical reproduction equipment available today. The result of a decade
of research by conrad-johnson design into the application of vacuum
tube devices to the reproduction of recorded music, the Premier Seven
was designed to establish the reference standard among preamplifiers
for reproducing the dynamics, tonalities, textures and ambience of a live
musical performance. The design and materials have been carefully
selected to yield years of unvarying excellence.
Please take a few minutes to read this manual so that you will better
understand the features and capabilities of your Premier Seven. NOTE
THAT THE Premier Seven LINE STAGE IS PHASE INVERTING. See
the section entitled "Getting the most from your Premier Seven" for
details on correct hookup in your system.
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Summary of Contents for Conrad-johnson design PREMIER SEVEN
- Page 1 The result of a decade of research by conrad-johnson design into the application of vacuum tube devices to the reproduction of recorded music, the Premier Seven was designed to establish the reference standard among preamplifiers for reproducing the dynamics, tonalities, textures and ambience of a live musical performance.
- Page 2 Seven 1. conrad-johnson design, inc. warrants to the original purchaser that the Premier Seven will be free of defects in materials and workmanship for a period of three years from the date of original purchase. 2. conrad-johnson will repair defective units without charge for labor or...
- Page 3 Premier Seven Owner’s Manual...
- Page 4 The Premier Seven requires an ac power line providing between 108 and 125 volts at 50 to 60 Hz. Alternatively, the Premier Seven is optionally available for operation on 100, 220, or 240 volt power lines.
- Page 5 Premier Seven inverts phase, it may be necessary to invert the speaker leads to maintain correct absolute phase. See the section on "Getting the most out of your Premier Seven" for an explanation of this. USE OF EXTERNAL TONE CONTROLS OR OTHER EXTERNAL SIGNAL PROCESSING DEVICES: Use Tape 1 and Record 1 for your tape recorder.
- Page 6 "howling" sound. LEVEL: The Premier Seven volume controls are twenty-three position stepped attenuators, selecting among twenty-three pairs of precision resistors. A front panel LED lights to display the selected attenuation.
- Page 7 ACUUM TUBE REPLACEMENT Each channel of the Premier Seven uses six vacuum tubes-one 6CW4 and 5 6GK5s. Each type has been carefully chosen for its particular circuit application. It is well known that tubes of a given type vary sonically depending on the manufacturer. We have chosen the brands...
- Page 8 THE Premier Seven IS PHASE INVERTING. If your system has an odd number of inversions, then you must add one phase inversion. This will be the case if the Premier Seven is the only unit in the chain that inverts phase. THIS IS CONVENIENTLY DONE BY REVERSING THE POSI- TIVE AND NEGATIVE CONNECTIONS TO YOUR SPEAKERS (be sure to reverse both channels).
- Page 9 It is possible to minimize these current flows by carefully selecting the way in which each component is plugged into the wall outlet. Because the power cords on the Premier Seven are not polarized, each can be plugged in two ways. It will normally sound better in one orientation than in the others.
- Page 10 Phase: line section inverts phase of all inputs (including phono) at main out Ouput impedance: less than 200 ohms Mechanical: Dimensions: Audio chassis: 19"W x 7"H x 16 3/8"D Power supply: 19"W x 3.5"H x 16"D Net Weight: 60 lbs. Premier Seven Owner’s Manual...
- Page 11 SERVICE In the event your conrad-johnson Premier Seven stereo preamplifier requires service, repack it in the original packing material and ship via United Parcel Service (UPS) to: Service Department conrad-johnson design, inc. 2733 Merrilee Drive Fairfax, VA 22031 Be sure to include a copy of your sales receipt from the original purchase, along with a note explaining the problem you are having in as much detail as possible.
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