Trafomatic Audio LARA, User Manual

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05
LARA - LINE LEVEL Preamplifier - U ser Manual
GETTING STARTED - ABOUT
YOUR LINE PREAMPLIFIER
Your LARA Line Level Preamplifier was designed to provide high value based on its high
performance, which is a result of a carefully designed circuit and optimized component selec -
tion. The design utilizes minimum number of active parts and top quality passive elements. The
LARA was conceived as a preamplifier with recognized Trafomatic Audio sound quality while
occupying more affordable price level.
The design is based on a very linear 6N30P vacuum tube and features maximum gain
of 20dB . The preamplifier operates in Class A with custom designed output transformers. A
dedicated power supply is housed in a separate chassis, for maximum separation. LARA pre-
amplifier comes with a standard, beautifully crafted remote control.
The LARA has three (3) single-ended (RCA) and two (2) balanced (XLR) inputs, single-ended
(RCA) and balanced (XLR) stereo outputs.Subwooferoutput is provided in stereo configuration.
As a valuable feature, phase reversal and ground lift switches are also available on the rear
panel.
HANDLING AND REPLACING VACUUM TUBES
Many people have never had experience handling vacuum tubes. Process is very similar to
handling in candescent 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 pa -
rameters.When replacing the tubes and removing the preamplifier’s cover, allow sufficient time,
minimum 30 minutes, for tubes to cool down andinternal capacitors to discharge.
Before you insert a tube you should make certain the unit is disconnected from the AC outlet.
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
preamplifer is powered on. Carefully align the pins with the socket and gently insert the tube.
Never force a tube into a socket.
The LARA preamplifier is designed around the 6N30P vacuum tube as a gain stage.
When the tubes are due for replacement, please contact Trafomatic Audio or authorized dealer
for recommendations about substitutes.
Should you decide to buy replacement tubes from TrafomaticAudio, rest assured that they are
fully tested before the shipment.