Related Manuals for Conrad-johnson design PREMIER 17LS
Summary of Contents for Conrad-johnson design PREMIER 17LS
- Page 2 Our reputation for producing among the industry’s most reliable compo- nents is a natural consequence of this engineering approach. Although the Premier 17LS has been designed to operate in an intui- tively apparent way, you will find useful information on it’s installation and operation in this manual.
- Page 3 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 pur- chaser, or five years from the date of shipment to the authorized conrad-johnson dealer.
- Page 4 Be aware that requesting an estimate will delay service to your unit as we will have to contact you for your approval before commencing service. Registering The Warranty Please return the enclosed card to the factory within 30 days of pur- chase to register the warranty Premier 17LS Owner’s Manual...
- Page 5 The first step in preparing your Premier 17LS preamplifier for use is to install the vacuum-tubes. To do this, remove the top plate of the tube guard by removing the four screws securing it to the guard. The Premier 17LS uses four type 6922 tubes.
- Page 6 Electromagnetic Interference (EMI) Considerable care has been taken in the design of the Premier 17LS to minimize it’s susceptibility to radio frequency interference and other forms of EMI. Choice of materials, physical layout, grounding practice, and power supply design have all been specified with a view to reducing the impact of electromagnetic fields on the performance of this unit.
- Page 7 We recommend the use of an amplifier with an input impedance of 20k ohms or higher. Since the Premier 17LS 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 17LS"...
- Page 8 When EPL2/THEATER is selected, the level will be set and locked to unity gain. vol dn, vol up: Level setting on the Premier 17LS is achieved by using a programmed microprocessor to select combinations from among an array of high-quality precision resistors.
- Page 9 With each step, a slight "click" will be heard from the opening and closing relays inside the Premier 17LS. Balance can only be set via the remote control. mute: Pressing the mute button will silence the preamplifier main outputs, and set the level display to zero on both channels.
- Page 10 Tube Replacement The Premier 17LS circuit employs four vacuum tubes (V1 - V4), all 6922s. The 6922 offers low noise, low 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...
- Page 11 This will be the case if the number of phase inversions is even (or zero). The Premier 17LS is phase inverting. If your system has an odd number of inversions, (for example, if the Premier 17LS 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 Premier 17LS do not hesitate to call Customer Service at (703) 698-8581. Premier 17LS Owner’s Manual...
- Page 13 Net Weight: 21 lbs total. Fuses The Premier 17LS has two power transformers (one for the tube circuitry, one for the control circuits), each of which is protected by a fuse. A failure of either of these fuses is a symptom of a more serious problem, and a competent service technician should be consulted.
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