Lawson L47MP MKII, Руководство по эксплуатации

Страница: 5 / 11

7
amount of glass cleaner directly to a lintless cloth and gently
wipe . Do not spray cleaners directly onto the mic .
Proximity Effect is the low frequency boost that occurs with
close miking . The closer the mic , the greater the low
frequency boost . Adjusting the pattern control actually
changes proximity effect The greatest proximity effect occurs
in the figure 8 position . No proximity effect occurs in the
omni position . Adjusting the pattern control changes
proximity effect and frequency response as illustrated in the
plots . To achieve your desired results , experiment with various
combinations of miking distance , polar pattern , and low
frequency contour switch positions .
Multi - Pattern / Cardioid Only Position Your tube mic features
a Multi - pattern / Cardioid - only switch located on the base of
the tube microphone . A blue LED behind the mic windscreen
glows when the multi - pattern mode is selected . When the
cardioid - only position is selected , the multi - pattern control on
the power supply is disabled and the blue LED inside the head
is off . The cardioid - only position increases the output of the
microphone by about 3 dB at the same time lowering the noise
floor by the same amount . Note! Turn the microphone
channel down at the console before changing the position
of this switch as an ear and speaker destroying A - bomb
wump will ensue .
Note! Turn down the microphone channel
at the console before changing the position
of the
10 dB pad and the Cardioid - Only
switches to prevent transient thumps .
Polar Pattern Selection The pattern selector control knob is
located on the front center of the tube microphone power
supply unit . This control is continuously variable and allows
small incremental settings anywhere between major
directional patterns . In other words , you are not limited to a
few preset clickstops . You may find it valuable and
6
The Lawson tube microphone is heavy . To protect your
investment and the toes of your clients , avoid the use of light -
weight stands or extremely long or unbalanced booms . When
attaching the tube mic to boom stands , wrap the cable around
the boom a few turns . By using the cable in this manner , it
may prevent a damaging fall , especially when using quick
disconnect mic holders . The L 251 and L 47 capsules are
internally shock mounted . No external shock mounting is
required .
Connect the provided 7- pin cable from the tube microphone to
the power supply . This cable should be connected BEFORE the
power supply is plugged into the AC wall outlet ( AC mains )
and BEFORE being switched to the ON position . This
procedure will avoid unnecessary power surges to the vacuum
tube and insure maximum tube life . Allow at least five
minutes warm - up time for maximum signal - to - noise ratio .
Use a standard 3- pin XLR mic cable between the tube mic
power supply and your mic pre . Forty - eight volt (48 V )
phantom power is not necessary . If applied , it will have no
effect on the performance of the tube mic . The tube mic only
requires 20 to 30 dB of mic preamp gain at the console with
close - up vocals . To insure lowest distortion , monitor the
console meters with the channel fader at its unity gain setting
(0 dB ) and then set the gain of the mic preamp . Make this
adjustment BEFORE inserting outboard limiters , equalizers ,
etc .
The Lawson logo engraving indicates the front of the
microphone . This side of the microphone normally points
toward the sound source . Use of a fabric windscreen is
recommended to prevent pops when doing up - close vocals .
The mic head and base are plated with nickel and / or 24 karat
gold to provide a lasting finish . To clean the mic , apply a small
Setting Up Your Tube Microphone