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Related Manuals for Conrad-Johnson LP70S
Summary of Contents for Conrad-Johnson LP70S
- Page 1 Conrad-Johnson Owner’s Manual LP70S Vacuum-Tube Amplifier conrad-johnson It just sounds right.
- Page 2 Thank you for selecting the LP70S to power your audio system. The LP70S draws on three decades of research at conrad-johnson into the reproduction of recorded music. The result is a power am- plifier with a remarkable ability to recreate the dynamics, textures, tonalities, and ambience of live musical performances.
- 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 origi- nal purchaser, or five years from the date of shipment to the au- thorized 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)
+ 5/- 10% of the nominal rated voltage. Electromagnetic Interference (EMI) Considerable care has been taken in the design of the LP70S to minimize its susceptibility to radio frequency interference and other forms of EMI. Choice of materials, physical layout, grounding prac-... - Page 6 Physical location and cable “dress” can be an important factor in minimizing hum pickup. The installation should situate the pream- plifier 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. LP70S Owner’s Manual...
- Page 7 INPUT: Connect the preamplifier to your LP70S 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 "dou- ble banana"...
- Page 8 No a-c balance ad- justment is necessary. It is necessary to re-bias the amplifier when the output tubes are replaced. The LP70S has built in bias indica- tors so that no instruments are required to make this adjustment.
- Page 9 PLATE FUSE: Your LP70S 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 10: Absolute Phase
This will be the case if the number of phase inver- sions is even (or zero). The LP70S is phase correct (non-inverting). If your system has an odd number of inversions, (for example, if you have a phase invert- ing preamplifier) then you must add one phase inversion. - Page 11 The warm up period can be expected to last about fifteen minutes. Questions: If you have questions about the installation or function of your LP70S do not hesitate to call Customer Service at (703) 698-8581. LP70S Owner’s Manual...
- Page 12 Net Weight: 54 lb net Fuses The LP70S power transformer is protected by a fuse on the ac power line (F5, located in a compartment in the ac line-cord recep- tacle mounted on the back of the amplifier), and by four separate internal fuses on t h e secondary circuits of the transformer (F1 –...
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