Related Manuals for Conrad-Johnson ET7
Summary of Contents for Conrad-Johnson ET7
- Page 1 Conrad-Johnson Owner’s Manual ET7 Vacuum-Tube Line-Stage 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 ET7. Note that this unit is phase inverting. See the section entitled “Getting The Most From Your ET7" for details on correct hookup in your system.
- 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. 2800K Dorr Avenue 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: Installation
5/- 10% of the nominal rated voltage. Electromagnetic Interference (EMI) Considerable care has been taken in the design of the ET7 to minimize its susceptibility to radio frequency interference and other forms of EMI. Choice of materials, physical layout, grounding... - 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 ET7 Owner’s Manual...
- Page 7 20k ohms or higher. Since the ET7 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 ET7" for an explanation. Conrad-Johnson ET7 Owner’s Manual...
- Page 8 When first connected to ac mains, or after an interruption of power, the ET7 will turn on in a default mode (after auto-muting), with the level set at 20, and the CD input selected. In subsequent sessions, as long as the ac mains supply has not suffered a power outage, the unit will turn on at the last used volume setting and input.
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Page 9: Remote Control
When THEATER is selected, the level will be set and locked to unity gain. Remote Control All operations of the ET7 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
We know of no vacuum tubes available which will improve the sonic performance of your ET7. The tubes that we supply have been tempered by a controlled burn-in procedure that permits them to perform for a greatly extended period without sonic degradation, and then selected for minimum residual noise. -
Page 11: Absolute Phase
This will be the case if the number of phase inversions is even (or zero). The ET7 is phase inverting. If your system has an odd number of inversions, (for example, if the ET7 is the only phase inverting unit in the chain) then you must add one phase inversion. - Page 12 The warm up period can be expected to last about fifteen minutes. Questions: If you have questions about the installation or function of your ET7 do not hesitate to call Customer Service at (703) 698- 8581. Conrad-Johnson ET7 Owner’s Manual...
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Page 13: Specifications
Net Weight: 19 lbs. Fuses The ET7 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. A failure of any of these fuses is a symptom of a more serious problem, and a competent service technician should be consulted.
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