Conrad-johnson design MV50 User Manual
Congratulations on your purchase of the conrad-johnson MV50 ampli-
fier. You have acquired one of the finer pieces of musical reproduction
equipment available today. You will find it to be capable of reproducing
with great accuracy the dynamics, tonalities, and textures of live musical
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 MV50.
MV50 Owner’s Manual 1
LIMITED WARRANTY FOR THE CONRAD-JOHNSON
MV50
1. conrad-johnson design, inc. warrants to the original owner that the
conrad-johnson MV50 will be free from defects in material and workmanship for a period of three years from the date of original purchase.
2. During the warranty period, conrad-johnson will repair defective units
without charge for labor or parts (with the exception of the vacuum
tubes) subject to the following conditions:
a) The unit must not have been altered or damaged through
misuse, abuse, negligence, accident or improper operation.
b) The purchaser must provide evidence of purchase at the time
service is requested.
c) All repairs must be undertaken at the factory or other service
center designated by conrad-johnson design, inc. Units submitted
for warranty repairs must be shipped in the factory packing carton
to conrad-johnson design or its designated service center, freight
and insurance prepaid by the owner, and will be returned to the
owner, freight and insurance prepaid by conrad-johnson design.
Replacement cartons are available from the factory for a nominal
charge.
d) Normal wear and maintenance are not covered by this warranty.
3. The above warranty may be transferred to subsequent owners provided that the warranty registration card has been returned to conradjohnson design, inc. within 30 days of the original purchase and that the
registered owner provides the factory with a signed notice giving the new
owner’s name and address and the model and serial number of the unit.
4. Where permitted by law, conrad-johnson design’s liability shall be
limited to that set forth in this warranty. No other warranty of any kind,
expressed or implied, is made by conrad- johnson design, inc., and all
implied warranties, including merchantability and fitness for a particular
"purpose", which exceed the obligations and time limits set forth herein
are hereby disclaimed. conrad-johnson design, inc. shall not be liable for
incidental or consequential damages. Some states do not allow the
exclusion or limitations on how long an implied warranty lasts, so the
above limitation or exclusion may not apply to you.
MV50 Owner’s Manual 2
5. This warranty gives you specific legal rights, and you may also have
other rights which vary from state to state. Questions about warranty
service should be addressed to:
Service Department
conrad-johnson design, inc.
2800 R Dorr Avenue
Fairfax, VA 22031
REGISTERING THE WARRANTY
Please return the enclosed card to the factory within 30 days of purchase to register the warranty. 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.
MV50 Owner’s Manual 3
CIRCUIT DESIGN
It has been our experience that simple designs with few active stages
when executed with care and great attention to detail will be both more
musical and more reliable than overcomplicated alternatives. Accordingly, the audio circuit of the MV50 is remarkably straightforward. A
single triode input amplifier is direct coupled to a cathode follower. This
arrangement offers exceptional phase linearity. This stage is direct
coupled to a cathode coupled differential phase inverter using high
current triodes to provide balanced, low impedance drive to the pushpull output stage. The output stage features ultralinear operation which
permits high power levels while greatly reducing the source impedance
of the stage. As a result, the amplifier is capable of supplying the large
current demands of high amplitude musical transients driven into reactive speaker loads. A substantial main power supply enables the MV50
to easily meet these extraordinary current demands. Voltage regulators
for the voltage amplifiers and phase inverters provide nearly absolute
isolation of these sensitive stages from the output stages.
MV50 Owner’s Manual 4
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