Trafomatic Audio Premise Evolution, User Manual

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PREMIS E EVOLUTION - TUBE INTEGRATED STEREO Amplifier - User Manual
GETTING STARTED
ABOUT YOUR AMPLIFIER
Your Premise Evolution Integrated Amplifier was designed to provide an excellent value
based on its high performance, which is a result of carefully designed circuit and optimized com -
ponent selection. The design utilizes minimum number of active parts and top quality passive
elements. The Premise Evolution carved a place of its own within Trafomatic Audio’s Evolution
product lineup.
The design is based on Tungsol EL84 power tubes . Four tubes in each channel are configured
to operate in push-pull and biased to operate in pure Class A. The power output of 25W per
channel is adequate to drive even the most demanding speakers.
The operation of output tubes can be switched between Triode and Ultralinear by a top-plate
mounted switch. Make sure to turn the amplifier off when changing the mode of operation.
Life of the output tubes is maximized by a proprietary auto standby circuit. Automatic bias en -
sures optimized performance throughout life of the tubes without need for periodic adjustments.
Fit and finish of the Premise Evolution makes it a welcome addition to every living environment.
The Premise Evolution Integrated Stereo Amplifier has four (4) line-level inputs and dedicat -
ed outputs for four (4) or eight (8) ohm speakers.
HANDLING AND REPLACING VACUUM TUBES
Many people have never had experience handling vacuum tubes. Process is very similar to
handling incandescent light bulbs. As with the 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 may break or change critical operating parameters. When replacing the tubes, allow sufficient
time, minimum 30 minutes, for tubes to cool down and internal capacitors to discharge.
Before you insert a tube you should make certain that the unit is disconnected from the AC out -
let. 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 unit is powered on. Carefully align the pins
with the socket and gently insert the tube.
Never force a tube into a socket.
Only the same type of vacuum tubes can be used - no substitutions are allowed. Should you
decide to buy replacement tubes from Trafomatic Audio, rest assured that they were fully tested
before the shipment.