Conrad-Johnson LP70S Owner'S Manual Download | Manualshive

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Conrad-Johnson Owner’s Manual

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LP70S Vacuum-Tube Amplifier

conrad-johnson

It just sounds right.

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Summary of Contents for LP70S

Page 1: ...Conrad Johnson Owner s Manual LP70S Vacuum Tube Amplifier conrad johnson It just sounds right ...

Page 2: ...it designs parts and materials for all conrad johnson products are selected with a view to maintaining optimal performance over the years Our reputation for producing among the industry s most reliable components is a natural consequence of this engineering approach Although operation of the LP70S is quite straightforward please take a few minutes to read this manual for useful information on it s...

Page 3: ...nson dealer in the United States for use in the United States d Normal wear e Incidental or consequential damages are not covered under this warranty Some states do not allow the exclusion of inci dental or consequential damages so this exclusion may not apply to you Obtaining Warranty Service To obtain warranty service the unit must be shipped along with evidence of purchase in factory pack ing t...

Page 4: ...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 Boxes and packing materials can be purchased through our service department if you no longer have yours ...

Page 5: ...ncy interference and other forms of EMI Choice of materials physical layout grounding prac tice and power supply design have all been specified with a view to reducing the impact of electromagnetic fields on the perform ance of this unit At the same time however our primary goal is the accurate reproduction of recorded music in the normal home environment and we have elected not to compromise this...

Page 6: ...able 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 ...

Page 7: ... together Terminals on speakers are usually coded one designated C ground or black the other des ignated or red In phase connection of the speakers can nor mally be achieved by taking care to connect the wire from the amplifier terminal to the red or coded terminal on each speaker and connecting the terminal to the black or coded terminal on each speaker In phase connection of the speakers can be ...

Page 8: ...mmend that you purchase re placement tube sets from conrad johnson design We anticipate tube life to accommodate two to three years of op eration without degradation in normal use if the amplifier is switched off when not in use If it is left on at all times tube life can be exhausted in a matter of a few months The LP70S has been designed to make tube replacement as sim ple as possible Because th...

Page 9: ...Your LP70S has been fitted with plate supply fuses that are installed to protect the amplifier circuitry in the event of output tube failure The fuse holders are physically located on the back panel near the speaker connectors The cap unscrews counter clockwise to remove the fuse KTK 1 An LED near the fuse holder will light when the fuse is blown What happens when the fuse blows If one of these fu...

Page 10: ...essure and the system is said to be phase inverting Each component in the stereo system either preserves the phase of the incoming signal and is said to be phase correct or inverts the phase and is said to be phase invert ing It is unimportant whether an individual component is phase correct or phase inverting as long as the system as a whole is phase correct This will be the case if the number of...

Page 11: ... interconnects will be system dependent those that are top ranked on one system may be a poor choice for a different system Consult your conrad johnson dealer for recommendations for your specific system Performance Tip Warm up the LP70S before listening The sonic performance of the LP70S improves noticeably as the unit warms up The midrange becomes more lucid the highs smoother and the soundstage...

Page 12: ... 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 the secondary circuits of the transformer F1 F4 located on the bottom of the pc board A failure of any of these fuses is a symptom of a more serious problem and a competent servi...

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