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Related Manuals for Conrad-Johnson ART 27A
Summary of Contents for Conrad-Johnson ART 27A
- Page 2 Thank you for selecting the ART 27A Amplifier to power your audio system. The ART 27A Amplifier draws on four decades of research at conrad-johnson into the reproduction of recorded music. The result is a power amplifier with a remarkable ability to recreate the dynamics, textures, tonalities, and ambience of live musical performances.
- Page 3 Limited Warranty For Conrad-Johnson Components Conrad-Johnson Design, Inc. will provide service under warranty to the original owner on products sold new in the United States for the lesser period of three years from the date of purchase by the original purchaser, or five years from the date of shipment to the authorized conrad-johnson dealer.
- Page 4 Questions about this warranty should be addressed to: Service Department Conrad-Johnson Design, Inc. 2800K Dorr Avenue Fairfax, VA 22031 The conrad-johnson service department can also be reached by e- mail at service@conradjohnson.com or by phone at 703-698-8581. Service If your conrad-johnson audio component requires service, repack it using the original box and packing material and ship to the Service Department address above.
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Page 5: Installation
Installation As is the case with any vacuum-tube power amplifier, the ART 27A Amplifier dissipates a significant amount of heat. Provision must be made for adequate ventilation. Mount the unit on a flat, hard surface, taking care that the ventilation holes in the bottom are unobstructed. - Page 6 4" (100mm) away from input/output cables. Connection INPUT: Connect the preamplifier to your ART 27A Amplifier at the RCA type connectors located on the back of the amplifier. OUTPUT: Five-way binding posts are provided for connection of your loudspeakers, with correct spacing to accept a standard "double banana"...
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Page 7: Vacuum Tube Replacement
Vacuum Tube Replacement The ART 27A Amplifier uses seven vacuum tubes of two different types: three type 6922 (V1, V2, V3,) and four type KT88 (V4, V5, V6, V7.)The ART 27A amplifier was designed exclusively for the use of KT88’s. We know of no vacuum tubes available which will improve the sonic performance of your ART 27A Amplifier. - Page 8 PLATE FUSE: Your ART 27A Amplifier has been fitted with plate supply fuses that are installed to protect the amplifier circuitry in the event of output tube failure.
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Page 9: Absolute Phase
This will be the case if the number of phase inversions is even (or zero). The ART 27A Amplifier is phase correct (non-inverting). If your system has an odd number of inversions, (for example, if you have a phase inverting preamplifier) then you must add one phase inversion. - Page 10 The warm up period can be expected to last about fifteen minutes. Questions: If you have questions about the installation or function of your ART 27A Amplifier, do not hesitate to call Customer Service at (703) 698-8581. Conrad-Johnson ART 27A Amplifier Owner’s Manual...
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Page 11: Specifications
Net Weight: 63 lb net Fuses The ART 27A Amplifier power transformer is protected by a fuse on the ac power line (F5, located in a compartment in the ac line- cord receptacle mounted on the back of the amplifier), and by four separate internal fuses on the secondary circuits of the transformer (F1 –...
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