Related Manuals for Conrad-Johnson ART88
Summary of Contents for Conrad-Johnson ART88
- Page 1 Conrad-Johnson Owner’s Manual ART88 Preamplifier conrad-johnson It just sounds right.
- Page 2 Please take a few minutes to read the manual to better understand the features and capabilities of your ART88 Preamplifier. Note that this unit is phase inverting. See the section entitled “Getting The Most From Your ART88 Preamplifier"...
- 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 origi- nal purchaser, or five years from the date of shipment to the authorized conrad-johnson dealer.
- Page 4 Service Department conrad-johnson design, inc. 2733 Merrilee Drive Fairfax, VA 22031 The conrad-johnson service department can also be reached by e- mail at service@conradjohnson.com, by phone at 703-698-8581, or by fax at 703-560-5360. 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: Electromagnetic Interference (Emi)
All ART88 Preamplifiers sold in the United States are configured for operation on a 60Hz ac power line producing between 108 and 126 volts. Export versions of the ART88 Preamplifier will have the correct operating voltage and frequency clearly marked on the back panel of the unit, near the ac power cord. - Page 6 Physical location and cable “dress” can be an important factor in minimizing hum pickup. The installation should situate the preamplifier well away from the power amplifier, and power (ac mains) cords should be dressed to remain at least 4" (100mm) away from input/output cables. Conrad-Johnson ART88 Preamplifier Owner’s Manual...
- Page 7 (or crossover in a bi-amplified system). We recommend the use of an amplifier with an input impedance of 20k ohms or higher. Since the ART88 Preamplifier inverts phase, it may be necessary to invert the speaker leads to maintain correct absolute phase.
- Page 8 The muting relay also grounds the outputs immediately at turn-off or in the event of any power line interruption. When the ART88 Preamplifier is turned off (by pressing the power switch again), the standby led will be illuminated. When first connected to ac mains, or after an interruption of power,...
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Page 9: Remote Control
THEATER is selected, the level will be set and locked to unity gain. Remote Control All operations of the ART88 Preamplifier can be controlled by the wireless remote unit. MUTE: Pressing the mute button will cause the main outputs to mute and the level display to be zero. -
Page 10: Vacuum Tube Replacement
Vacuum Tube Replacement The ART88 Preamplifier circuit employs four vacuum tubes (V1 – PCC88's. PCC88 V4), offers noise, microphonics, and gain well suited to use in a zero-feedback line-stage. The brands of tubes we supply have been chosen by first selecting those brands which are known to be most reliable,... -
Page 11: Absolute Phase
This will be the case if the number of phase inversions is even (or zero). The ART88 Preamplifier is phase inverting. If your system has an odd number of inversions, (for example, if the ART88 Preamplifier... - Page 12 Questions: If you have questions about the installation or function of your ART88 Preamplifier do not hesitate to call Customer Service at (703) 698-8581. Conrad-Johnson ART88 Preamplifier Owner’s Manual...
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Page 13: Specifications
Dimensions: 16"D x 18.75"W x 5.44"H Net Weight: 33 lbs. Fuses The ART88 Preamplifier has two power transformers (one for the tube circuitry, one for the control circuits), each of which is protected by a fuse. In addition there is one fuse on the ac mains.
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