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Congratulations on your purchase of the conrad-johnson MV125 ampli-
fier. You have acquired one of the finest pieces of music reproduction
equipment available today. You will find it to be capable of reproducing
with remarkable accuracy the dynamics, tonalities, and textures of live
music performances. The design and materials have been carefully
selected to yield years of unvarying excellence.
Please take a few minutes to read this manual so that you will better
understand the featues and capabilities of your MV125.
MV125 Owner's Manual
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Summary of Contents for Conrad-johnson design MV125
- Page 1 Congratulations on your purchase of the conrad-johnson MV125 ampli- fier. You have acquired one of the finest pieces of music reproduction equipment available today. You will find it to be capable of reproducing with remarkable accuracy the dynamics, tonalities, and textures of live music performances.
- Page 2 MV125 1. conrad-johnson design, inc. warrants to the original owner that the conrad-johnson MV125 will be free from defects in material and work- manship for a period of three years from the date of original purchase. 2. During the warranty period, conrad-johnson will repair defective units...
- Page 3 Proper registration of the warranty is important! It will enable us to inform you of any alterations in the design of a given model and of any new products we offer which are likely to be of interest to you. MV125 Owner’s Manual...
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Page 4: Circuit Design
Accord- ingly, the audio circuit of the MV125 is remarkably straightforward. A triode input amplifier comprised of paralleled sections of a 5751 is direct... - Page 5 For more restricted installations, cooling fans are essential. The front panel of the MV125 will fit in a standard 19" equipment rack and is designed to carry the weight of the unit so that it may be rack mounted.
- Page 6 With the speakers con- nected out of phase, the voice will be diffused, with no identifiable source. Relative phase may be reversed by switching the "+" and "-" leads at one speaker only. MV125 Owner’s Manual...
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Page 7: Absolute Phase
"phase inverting". Each component in the stereo system is either phase correct or phase inverting (including the cartridge and speakers-these are normally phase correct). Your MV125 is phase correct. It is of no consequence if an individual component is phase inverting, as long as the system as a whole is phase correct. - Page 8 Consult your conrad- johnson dealer for recommendations for your specific system. QUESTIONS? If you have any questions about the installation or function of your MV125 do not hesitate to call Customer Service at (703) 698- 8581. MV125 Owner’s Manual...
- Page 9 No a-c balance adjustment is necessary. It is necessary to re-bias the amplifier when the output tubes are replaced. The MV125 has built in bias indicators so that no instru- ments are required to make this adjustment.
- Page 10 WITH A FUSE OF DIFFERENT TYPE OR RATING THAN THAT SUP- PLIED BY THE FACTORY. PLATE FUSE: Your MV125 has been fitted with plate supply fuses which are designed to protect the amplifier circuitry in the event of output tube failure. The fuse holders are physically located near the speaker connectors.
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Page 11: Specifications
Small Siganal Distortion: Less than .1% at midband Phase: Phase correct (non-inverting) Frequency response: 20Hz to 20KHz +0, -.5dB Hum and noise: 96dB below full power output. Input impedance: 100K ohms. Dimensions: 20.5D x 19W x 8.75H inches. Weight: 80 lbs. MV125 Owner’s Manual... - Page 12 If the problem is intermittent, please indicate. If you do not have the original packing material, replacements are avail- able from conrad-johnson design at a nominal charge. If the unit is under warranty, be sure to enclose a copy of your receipt as proof of purchase.
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