Lawson L47MP MKII, L251, L47FET, L251FET, Quick Change Operation Manual
Operation Guide for Lawson Models:
L47MP MKII Tube Mic
L251 Tube Mic
L47FET
L251FET
Quick Change™ Capsule System
Lawson, Inc.
Relive the Magic™
2739 Larmon Avenue
Nashville, TN 37204 U.S.A.
615-269-5542
Fax 615-269-5745
www.LawsonMicrophones.com
CAUTION! The Lawson vacuum tube mic power supply
contains voltages exceeding 200 volts.
* Disconnect the microphone from the power supply before
removing or replacing Quick Change™ Capsules.
* Disconnect the microphone from the power supply before
changing the vacuum tube.
* Your Pelican case is water proof; your microphone is not. Do
not immerse your microphone in any water or liquid.
* Do not spray cleaners directly onto your microphone. Doing
so may damage the capsule. If you wish to clean the exterior
of your mic, spray Windex (or similar cleaner) onto a clean
towel and then wipe.
* The capsule is housed in a protective wire cloth head
assembly. Do not remove the capsule from its protective
housing. To do so may damage the diaphragms and void your
warranty.
* During the warranty period, repairs should be referred to
Lawson, Inc. After expiration of the warranty, for safety
reasons any repairs should be referred to Lawson, Inc., or to
qualified service technicians.
Safety Precautions
Congratulations and thank you for purchasing Lawson
microphones featuring the versatility of QuickChange™
capsule(s). Lawson microphones are hand-crafted in the USA
by real people with pride to give you many years of service
and enjoyment.
To familiarize yourself with the special features of your
Lawson microphones, please take the time to read this
manual.
Your Lawson microphone(s) shipped from the factory
configured as indicated below:
Checked by: ???
Date: xxxx.xx.xx
Vacuum Tube Microphone Serial Number:
???
FET Microphone Serial Number:
???
Introduction
3
(=included; =not included)
L251 Quick Change™ Capsule--a faithful reproduction of
the one inch capsule used in the Telefunken ELAM 251, a rare
vintage mic renowned and coveted for its sparkling
airy
highs
and warm solid lows
L47MP MKII Quick Change™ Capsule--a faithful repro-
duction of the M7 capsule used in the legendary German-made
U47 and M49 microphones featuring 3-micron gold sputtered
diaphragms for improved high frequency and transient
response. Each capsule is precision machined from solid brass,
then hand-lapped in the Lawson lab to insure consistent per-
formance from mic to mic. The L47 is renowned for its versa-
tility, warmth, character, and ability to stand out in a mix.
Universal FET (field effect transistor) 48V Phantom
powered electronics that accepts any Lawson Quick Change™
Capsule. The FET features the cardioid pattern only, a -10/-
20dB pad, and switchable Low Frequency control
Tube Electronics that accepts any Lawson Quick
Change™ Capsule
Universal tube mic power supply featuring an infinitely
adjustable polar pattern control, 10 dB pad control, and
switchable Low Frequency Contour Control
30 foot 7-pin cable specially designed and shielded for
tube mic usage
(1) Swivel Mic Holder(s)
Power Cord
Shock Proof Carrying Case(s)
Your Microphone Components
2
Introduction
Your Microphone Components . . . . . . . . . . . . . . . . . . .3
Classic 251 Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Classic 47 Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Setting Up Your Tube Microphone . . . . . . . . . . . . . . .6
Proximity Effect . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Multi-Pattern/Cardioid Only Position . . . . . . . . .7
Polar Pattern Selection . . . . . . . . . . . . . . . . . . . . .7
10 dB Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Low Frequency Contour Control . . . . . . . . . . . . .8
Vacuum Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
How to Replace the Fuse . . . . . . . . . . . . . . . . . .10
Setting Up Your FET Microphone . . . . . . . . . . . . . . . .11
10dB/20dB Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Low Frequency Rolloff . . . . . . . . . . . . . . . . . . . . .12
Quick Change™ Capsule System . . . . . . . . . . . . . . . . . .13
Specifications Summary . . . . . . . . . . . . . . . . . . . . . . . .14
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Appendix
Pelican Case (Things You Should Know) . . . . . .17
Table of Contents
5
Classic 251 Sound The classic 251 sound has been
characterized as
airy, sparkly
, and
breathy
. These
characteristics in large part can be attributed to the broad
boost at approximately 10 kHz. The L251 capsule also exhibits
a large proximity effect that provides a warm bottom end.
L251 Frequency Responses
4
Classic 47 Sound The classic 47 sound has been characterized
as
forward, present
, and
warm
with the ability to
stand out in
a mix
even when
wrapped with the band
making it an
excellent choice for vocal and voice over applications. These
characteristics in large part can be attributed to the presence
rise at approximately 4.5 kHz. Although not as great as the
L251, the L47MP Mk II capsule also exhibits a proximity effect
that provides a warm bottom end.
L47MP MKII Frequency Responses
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