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Related Manuals for Conrad-Johnson LP140M
Summary of Contents for Conrad-Johnson LP140M
- Page 1 Conrad-Johnson Owner’s Manual LP140M Vacuum-Tube Amplifier conrad-johnson It just sounds right.
- Page 2 Thank you for selecting the LP140M to power your audio system. The LP140M draws on three 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 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 LP140M 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. LP140M Owner’s Manual...
- Page 7 INPUT: Connect the preamplifier to your LP140M amplifier at the RCA type connector 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 bal- ance adjustment is necessary. It is necessary to re-bias the ampli- fier when the output tubes are replaced. The LP140M has built in bias indicators so that no instruments are required to make this ad- justment.
- Page 9 PLATE FUSE: Your LP140M 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 LP140M is phase correct (non-inverting). If your system has an odd number of inversions, (for example, if you have a phase in- verting 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 LP140M do not hesitate to call Customer Service at (703) 698-8581. LP140M Owner’s Manual...
- Page 12 Net Weight: 54 lb net Fuses The LP140M 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 the secondary circuits of the transformer (F1 –...
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