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WLM Acoustic Sonata Owner's Manual page 5

Vacuum tube integrated amplifier

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Getting Started - About Your Amplifier
Sonata
Your
amplifier was designed to provide a significant value based on a high
performance to price ratio. Two matched pairs of EL34 power output tubes and four
ECC82 input stage tubes are used by your
20 watts RMS per channel, and in Class AB up to 35 watts RMS per channel. All parts
have been carefully chosen for the optimum sound quality and the overall circuit layout
is maximized for sonic purity.
Construction and Testing
Sonata
Your
amplifier has been carefully built by highly skilled European craftsmen. To
assure consistent performance, each
testing before being shipped. This time-consuming perfectionist approach in the design
and manufacturing of audio equipment is intended to provide the best in musical
satisfaction with lasting value.
Handling Vacuum Tubes
Many people have never had experience handling vacuum tubes. The process is very
similar to handling incandescent light bulbs. As with light bulbs, you should not touch a
vacuum tube when it is operating since you can burn yourself. Similarly, if a tube is
dropped on a hard surface it will break. When replacing the tubes allow sufficient time (a
minimum of 15 minutes) for the tubes to cool down and internal capacitors to discharge.
Before you insert a tube you should make certain the unit is disconnected from the AC
outlet and that the tube has cooled down. Inspect the tube for cracks and physical
damage. Make sure that the pins are straight. If you need to straighten the pins, be very
careful as it may cause the glass envelope to break, causing the tube to lose the vacuum
and fail as soon as the amplifier is powered on. Carefully align the pins with the socket
and gently insert the tube. Never force a tube into a socket.
Packaging
Save all the packaging in a dry place. Your
instrument and should be properly packaged any time shipment is made. Because of its
weight, it is highly probable that the unit will be damaged during shipment if repackaged
in a box and packing other than that designed for the unit.
Sonata
, which operates in Class A for the first
Sonata
amplifier goes through extensive electrical
Sonata
amplifier is a precision electronic

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