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MIGROPHD f
ia ©
I
AND
ACOUSTIC DEVICES
i ccetaniincel
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BASIC CONSIDERATIONS IN
MICROPHONE APPLICATIONS
Three Basic Types: A microphone fs an voltage or current source. The output of the micro-
instrument for converting sound energy into electrical phone con be connected directly to the grid of on
energy. This is accomplished by Shure Brothers through omplifier tube.
three fundamentcl types of microphones: carbon, Crystol microphones are excellent generol purpose
crystal, ond dynamic. Each employs a specific funda- mixrophones. They cre available in specially designed
mental principle of operation. Obviously the opplicction models for communications use as well as standord
determines the type of microphone to be used. models for public address and recording. Crystal
microphones ore also built by Shure Brothers for
Carbon: In the carbon type, direct current flows special applications, such as measyring of sound level,
through the microphone. As the pressures ond otc.
rorefactions of the sound weve occur at the dic-
phrogm, they cause the movement of the diophrogm : a
of the es to press and release the = Dynamic: Dees cing :
one or two comers of the crystal ond the other end microphone is the heart of the sound system. The
of the drive pin is attached to a diaphragm, The difference between having c good or bad installo-
movement of the diaphragm and drive pin bends the tion begins with the proper choice of the microphone.
erystel in occordance with the pressure of the sound When you select a microphone, the greatest considera-
wave, This creates on alternating potential of sub- tion should be giygn to the polar response of the unit,
stonticlly the same wove pattern as the sound wove, more commonly known as the “pickup potter.”
A crystal microphone does not require o seporate Polar response chorocteristic describes the variation
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of sentitivity os a function of the direction of orrival sound acts upon the outside of the diaphragm and
of sound. It is commonly published os « function of alto enters co phase-shifting acoustic network within
ongle in the horizontc! plane. Microphones cre the microphone where it acts upon the inside of the
available with the following polar chorocteristice diaphragm. When sound arrives from the froat of the
microphone, the inner pressure reinforces the outer
Cj 1, Nondirectional—picks up sound with pressure. When sound comes from the rear of the
equol sensitivity from all directions. microphone the inner pressure cancels the outer
pressure, cousing a lerge reduction in sensitivity to
sound coming from the reor of the microphone. This
| 2. Semidirectional (conventional type)— principle results in a cordicid or syper-cardioid micro-
Proctcalty nondireciioncl ot low fre- phone with one transducer unit, wide-angle front
pasar} eT oe tain Ne pickup, ond @ reduction in pickup of random sound
—_ energy of 66% to 73%. The Shure super-cordioid
and cardioid polar patterns are shown below.
3, Bidirectioncl—picks up sound from
Q. front ond rear, Dead ot ddes. Frequency Response: Fidelity of repro-
duction begins with the frequency response of the
4. Cardioid — microphone has hearl- microphone. The eatire system can be no better thon
shaped pickup pottern—sensitive ot the microphone it uses. For high quality Public Ad-
front, dead at rear. Ratio of front-to- dress, Broadcasting and Recording, it is essential
Ay rear sonsitivity for sounds orriving at to heve a microphone with o peak-free, extended
rondom, 7 to 1. frequency response. For amateur brocdcesting and
=i i communications work, it is desirable to provide a
– 5. Super-Cordiold—tuproved cardioid full ond smooth high frequency end in order to
pottern. Sensitive ot front, dead ot fi fapness. ond. intelligibad § moaach: at
recor. Ratio of front-to-rear sensitivity er . ay x : °
for is arriving ‘at rondom; 14 some expense of the overall fidelity. The higher
ioc priced Shure microphones ore carefully engineered
The lotter two types of microphones solve many lowest cost microphones ore designed to give peck-
problems in sound and broadcast work. The cordioid free performane with frequency ronge consistent
and super-cardicid unidirectional microphones have with the price and best suited to the application for
@ wide-angle response which diminishes sharply to which the microphone is recommended.
@ pronounced dead zone ot the rear. This character-
istic Is especi helpful in stopping feedback, build-
ing up ee saeen dnoliying, micophista place- Polar Response—Cardiold and Super-Cardiold
ment, cllowing the performers to stand farther away : REAR
from the microphone, eliminating undesirable rever- a 4 eg = we bx re
beration and background noises. IK xS tf / > . oy
In selecting directional microphones, however, be TAPS XT *
¢certoin thet the cardioid pattern covers the entire {> qT i TD SA se T
frequency ronge. A chain is only as strong os ils ~ – 4 SS.vS= w
weakest link, and if the cardioid microphone is rela- ¥ SOY
tively nondirectionc!l at some frequencies, the micro- iS Mi
phone will feed back and howl at those frequencies.
This is porticularly common in some microphones ct ow T o
low frequencies, XY n
: w LTS ie
Uniphase: The Shure Super-Cardicid uses the Se
—$- wc
exdusive Shure Uniphase principle. In the Uniphase, –=–cnmnnn FRONT
3
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SHURE SUPER-CARDIOIN
“BROADCAST”’ General: Models 556 and 55 are Super-
Cordioid type unidirectional moving-coil dynamic
microphones providing wide-range high quality repro-
duction of sound. The true unidirectional characteristic
of the “Unidynes,” obtained by the “uniphase™ prin-
ciple provides highly satisfectory operation under
\ adverse ccoustic conditions where conventional micro-
phones would be practically useless.
§ The microphones have a New Acousto-Mechanical
cireyit containing a meving-coil element, which operating
in conjumction with o high flux magnet provides high
efficiency and smooth peak free response from 40 to
, 10,000 cycles. The rear response is down approxi-
>, mately 15 db due to the “uniphase” unidirectional
acoustic network.
The new moving-
= public oddress, and similar opplications.
—— 4 The trve unidirectional choracteristic of the “Uni-
bith a dynes” provides an eosy solution to the feedbock
: ‘ problem in reverberant locations, focilitetes orchestral
3 | placement, permits best utilization of space in smoll
ti J : broadcast studios, and allows practically complete
‘ exclusion of unwanted noises. The swivel allows the
om oS head to be tilted through on angle of 90°, permitting
the microphone to be aimed ot the source of sound.
MODEL 556 The microphones cre unuwally rugged ond ore
practically immune to the effects of moisture, tempera-
ture and mechanical vibration,
Model “556” is a Dynamic Super-Cardivid Micro-
phone especially designed for Broodcasting. It is held
within extremely dose tolerances in frequency Fe- CALIBRATION SERVICE
sponse and directivity, ond is equipped with a special
vibration isolation unit, which eliminotes reproduction As a service to the Electro-Acoustic Industry,
of vibration transmitted from the stend. Shure Brothers loboratories offer a colibration
service on the “556” and “55” microphones
| i — — 1 for use os secondary stondards. The price for
move ) came | eG | cope | i © colibrotion from 60-10,000. cycles per
second is $25.00, net.
336 71. 4% ibs RUMUB | $85.00 |
‘ SHURE
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All microphones hove the standard %”-27 thread “UNIDYNE”’
and may be mounted on ony Shure desk, banquet,
or floor stand.
Medel 556 “Broadcast” has a 7-foot two conductor
shielded cable, trimmed for the attachment of any SF
type plog. The cable is held by screw terminals in —
the bose of the isolation unit and may be easily
replaced b er lengths.
Noel 55 eile hee 25 feet of two conductor ee 4)
shielded cable with a detochable plug. ee, [=
ned oe
ee ; Si
Impedance Data: Models 556 ond 55 ee f = Ee
Microphones ore of the multi-impedance type. They =, aE ee
may be worked directly into @ 30-50 chm line, o c =
150-250 ohm line, or @ high impedence input. Selection ee) | [ee
of these impedances is accomplished by changing the 5 —
position of the switch ot the rear of the mirophone. >
The switch positions are marked “L” for low impedance SX ’ a
(30-50 ohms), “M” for medium impedance (150-250 :
ohms), ond “H” for high impedance (35,000 ohms). aS
The low ond medium impedance positions of the P
Model 556 moy be fed into a stondard low or medium
impedance inpet amplifier or into an amplifier with >
high impedance input, In the latter case, Shure Model
A86A Cable-Type Tromsformer is avoilloble for }
coupling the low impedance line to the amplifier input. L
The dovble winding primary of the Shure Model A86A \
Cable type transformer permits coupling either a 30-50 Ni
‘oben line or 150-250 ohm fine to high impedance input.
The low and medium impedence positions are recom- — J \
mended where long cable lengths cre required or under U | ¢
conditions of severe hum disturbances. The permissible G bat
line length is practically unlimited, since neither response 7.
nor level is appreciably offected by reasonable lengths
<<" : MODEL 55
The high impedence position on the Models 556 and Model 55 has the some mechanical properties os
55 Microphones may be used with any amplifier the 556, with the exceptions noted on the opposite
with an imput impedance of 100,000 chms of more. page, referring to the vibration isolction unit. It has
been most widely used in high-quality public eddress,
recording, communications, small studio and remote
IMULTI-IMPEDANCE SWITCH ON MODELS "55" AND “556” broadcasting.
pet ania The Unidyne is perhaps the most widely used and
IPED, TARE] OUTPUT LEVEL] «GS publicized microphone in the world for public ad-
Lusso | 5&1 db Below ae Ah, dress. It hos been specified by outstanding ccovstic
obves ees wae , engineers for nationclly-known ortists ond important
150.250 380 db below! iG , \) 5 Fe ee
[rar ies MM | | cn om at, [ow]
[W—Wiok | 55 & below | Smee | Moo. | SAME | weorr | COPF | pace |
peters -Lyed parte SM = ss | 254) Me | tumUL $5500 |
Jf
SHURE 5
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TWO NEW HIGH-OUTPUT
THE “SONODYWNE”’?’ = General: the Model 51 Sonodyne is o preswure dy-
namic high-output microphone with wide-renge frequency
response and typical semi-directional pickup characteristics.
rr It fectures the Shure Multi-lmpedance Switch. You may
select the proper operating impedance by merely changing
a the position of the Impedance switch. The “Sonodyne”
operates on the principle of o moving-coil element in a
magnetic field. A high-flux magnet is used in the magnetic
circuit, which together with o specially designed moving
——— system and ossociated acoustic network, provides high
= efficiency and smooth, peok-free response. Eoch microphone
ee is provided with a built-in receptede and a two-conductor
mt shielded plastic-jocketed cable with microphone plug at-
oI toched. The rich Pearl-Gray cose is functionally designed
ae for improved acoustical performance ond modem cppear-
a once. Frequency response 60-10,000 cp.s,
} —— Applications: The “Sonodyne” is ideal for all gen-
ry eral purpose use, including public address, recording,
; el comenunicotions, and similor applications.
Be
\ et IMPEDANCE TAME OUTPUT LEVEL i
eri 1-35-50 orves ao ete iee |
[itecrsnts | Sz
H—-High Impedonce ia por be
Pa S eee
| moet | CAME | wisi | cone | pace
MODEL 51 L 31 20h, | 43th.) RUSON | $31.00
THE “”“ECONODYNE’”’
The “Econodyne” is a sturdy dynamic microphone thot offers high-
2 quolity performance for low cost, It is a pressure dynamic microphone
with smooth frequency response and senti-directional pkkup character-
istics. Frequency response 60-8000 c.p.s, The microphone is provided
with @ single-conductor plestic-jacketed cttached cable,
— = Applications: ‘The “Econodyne” is the idec! microphone for
/ fow-cost public oddress, recording, communications ond similer instal-
lations.
. | j | UAreD. | SHPO. ust
ie t MOOFL | Came | OUTPUT | ANCE WEXGHT COOE PRICE
; eee | | $2 Hin
32 156, | below 1 volt 2¥hlb. | RUMIN | $20.00
per bar irepedence | |
MODEL 52
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“”*MONOPLEX’”’
CRYSTAL SUPER-CARDIOID
The Shure “Monoplex” is a high output Super-Cardioid
Crystal Microphone with the patented Shure “Uniphase” STILL A ’
principle, It employs the some type of acoustic phase
shifting network used in the highest cost Shure broadcost LTILLi x
microphones. It provides « reduction of approximately 15 49999 a ”
db of sound approaching from the rear—over a broad 79999 ~ )
range of frequencies, and reduces pickup of random sound – J
energy by 73%. tt offers the advantages of higher-priced 49799 > d
super-cardicid performance at low cost, Model 737A is 0 9999 =
unidirectional wide-ronge dicphragm type microphone. >
The true unidirectional “sper-cardicid” characteristic i
of the “Monoplex” allows highly satisfactory operation f
under adverse conditions of background noise ond rever- /
berotion where o conventional microphone would be > ——— g
proctically useless. The “Monoplex” contains a diaphragm-
type clement combined with acoustical networks which
cause cancellation of sound preswres for sounds incident
from the reor. The crystcl is “Metcl-Seal” covered to
withstand adverse climatic conditions. Case Is pivoted ot
the rear ond may be conveniently pointed in the direction ae =m a hy
of the desired sound, or pointed upwards for non-direc- \ y ee : :
fionol horizontal plane pickup. Pearl Groy finish. a fist is
3 S ae = I u =
Applications: the Shure “Monoplex” is oxcel- MODEL 737A
lent for high-quelity public-oddress, communicotions,
oll types of recording and similar opplicctions The Shwre “Monoplex™ is o high-output, unidirectionc!
The true wide-range imidiractional choracteristic of crystal microphone, it Is the only svper-cordicid
the “Monoplex” creates on easy solution to the feed- oma microphone; (onde) such ronks.: fae: dhove
ordinary crystal microphones, Its high output provides
back problem in reverberant locations, facilitates that extra “push” that is needed for different opplica-
orchestral placement, permits good utilization of space tions, where a “strong” voice is a “must.” Hos special
in small recording or broadcasting studios, ond allows “Metal-Secl” Grapholl Bimorph Crystal for long
© practically complete exdusion of unwanted noises. fife. Swivel head permits ciming at source of sound.
Frequency response is from 60 to 10,000 cycles over Built-in coble connector. Stondard %”-27 thread.
a wide range angle at the front, yet proctically un- Height 4°. Width 34Q”. Thickness 14″.
affected by sound opproaching from the rear, (Rear Se
response down approximately 15 db.) Permits more mone |cane| ourur | imrto, | coor rect ‘
volume without feedbock—simplifies microphone and a or Hien | :
specker placement—greatly improves systems using 737A | 20 tt, 2 aid RUMON | $29.00 |
conventional microphones. pera | | ae say
SHURE $
=== Page 8 ===
THE NEW “‘VERSATEX”’
VERSATILE CRYSTAL MICROPHONE
protection against radio Ba
ean : frequency burn-outs iN
when used with radio re )
: tronsmitters. The Model he
os "i 718A”Versctex” is sup- BIR aas ae
= . plied with a 7-foot
; shielded —_ plastic-jack-
: = – eted cable, SS ¥
F ; Applications: gaa S
\ The Model 718A Verso: amma
tex has o frequency re-
2 sponse of 60-8000 c.p.s. .
with o specially engi-
; neered voice response Pre
coo | for maximum intelligi- aia
ae) ’ bility. It is the idea! a= ol
ee : “Ham mkrophone and ess
7 is also very rats for ©:
\ home recording, low =
Ce cost P. A. Systems, Call Systems, and semilor uses.
The durable plastic case of the Versatex mokes this
: microphone especicilly safe for use with amoteur
equipment. The cartridge unit is mounted in rubber to
MODEL 718A provide mechanical isolation from the case, %0
that the microphone moy be handled or carried cbout
General: Model 718A “Versatex” is on ex- without annoying mechanical nolse piéup.
tremely versatile high-output diaphragm type crystal
microphone. The “Versatex,” the versatile crystol = Installation: the Model 718A Versatex, is
microphone, is witable for placement on table top, designed for placement om o flot surface and clio
desk top, or other flat surface; it fits conveniently may be held or carried in the hand. The microphone
in the palm of the hond for use as a bond micro- is provided with o regular 34°-27 threed for use on
phone; ond it may be used on a conventional floor ony floor stand. No other connections need be made
stand for home recording, public oddress systems, except the cable connection to the omplifier. Shipping
and similar purposes, The “Versctex,” the versatile weight 1% Ibs,
caydel microphiosey: bes typlon!’ eari-dicactiona! |psop- [mone |caue| oureur | awe. | cove | ust price |
erties. The crystal used is a Bimorph unit with special- | ase a 4
Process moisture-proofing. The microphone is provided 718A | 7 ft. | below } volt] tmped- | RUTEX $10.00
with co built-in protective resistor to give increosed = ree =
: SHURE
=== Page 9 ===
™ 7JO7A CRYSTAL
a The Model 707A has been designed to give good-quolity perform:
ence ct low cost. It has good response characteristics, is free from
= peaks, and hos typical senidirectional pickup, NW uses moisture-
| proofed Bimorph Crystal, mechanically isolated. Ideal for voice and
t rousic reproduction, Syitoble for low-cost P. A. systems, call systems,
| | omateur ‘phone transmitters and similar applications.
it ts finished in Pearl Gray finch with highly-polished plating
| on front grille. Notural life-like reproduction. High output level of
53 db below 1 volt per bor ot end of cable. Hos a seven-foot single-
conductor shielded cable with spring protector. The case is a heavy
die casting, is simple in design and in excellent taste. Standard
34-27 thread. Diameter 2%”. Shipping weight 1’4 pounds.
Model 707A Crystcl Microphone (Stand not included).
| mova | came! ourrur | rtpance | cove | —
a es ———_—} |. mail
| $3 db below | . |
| 7O7A | 7# sell pire be ia | nuooee =
aes | zi | —
|707~20 ait,’ | Se rest auooK | $15.00 |
707A shown on $248 stond
STRATOLINER
The microphone is alwoys in the public eye. It is the only port of
the sound system your audience or buyers see. The Shure “Strato-
liner” gives you the opportunity to use on expensive-looking micro
phone even when low cost is an importent foctor. High output a —
level (53.0 db below 1 volt per bor) with wide-range response ——_ 7
{free from undesirable pack! for good reproduction of either — = —_—
voice or music, Uses genuine Bimorph Crystal. When placed hori- —_———
zontolly, the 7OBA is semidirectionol; uted vertically (microphone 7 —————J A
pointed stroight up) it becomes non-directional im the horizental »# rl
plane, ond performers may be placed all around it without fre- =
quency discrimination. A swivel is provided to permit tilting of the
microphone through on angle of 90°. Cose dimensions, diameter
214″, length 4147. Stond thread 54’—27. Shipping weight 214 e
pounds. Frequency response is 60-8000 cps. Peorl Gray finish. ;
i —— = eA gr
| Moot | CAME | OUTrUT eve IMPEDANCE | cove | ae | a i)
| 53.0 db below |
| 700A 7 4. | cae volt par bar High ruouM | $21.00 Br a
Soap 7 Takes Gece, eee =a) ae .
70eA—20 | 20m. | 56 a below | mowers’ | auvat | $22.50 a e bi
one volt per bor :
=== Page 10 ===
t 3
‘*SPECIAL MICROPHONES
AND ON-OFF SWITCHES
SHURE 76B LAPEL MICROPHONE
Designed for Public Address, lecturing, portable tronseitters, and all general
uses for intelligible reproduction of speech. Permits user to move frealy. }
It is G pressure-octuated diophrogm-type crystal microphone. The crystal
used is a Graphoil (high copacity) Bimorph crystol, moisture-seoled. The x
microphone is inconspicuous, and weighs only 1% ounces. Response from J
40 to 6,000 cps. High frequency response accentucted for maximum
intelligibility. Free from undesirable peaks. 174” diometer. Gray finish.
Lepel dip. 25-foot shielded single-conductor cable. Shipping weight 1
pound, Output level: S7 db below 1 volt per bar. oe
Model 76B. Code: RULOP. List Price $27.00.
MILITARY CARBON—100 SERIES
ae High-quality, carbon microphones specially designed for military and
= / police equipment and other uses where ruggedness and dependability
——— are vital factors, Cleor, crisp voice response. High output. Easy to use,
| ————J fits snugly into palm of hond. Heavy duty switch for push-to-tolk per-
oo formance. Furnished with hook for suspension and bracket for wall
= mounting, plus Kellogg “Koiled Kord” cable. Adopted as standard
microphone by leading manufacturers of police transmitters. Output
level: 32 db below 1 volt for 10 bar speech signal. Net weight 14 oz.
Shipping weight 1 pound, Cose dimensions 334” high, 134” deep,
J 2%” wide.
| MODEL | SWITCH ARRANGEMENT came | cove [usr PRICE |
| Two Wire Relay Switch neemoty | 4 ft,
Oe open 4 Conductor | nucEG $30.00
| (No microphore reitch) Unitielded
| yore | Bley sorally open Mkro- SR |
chug mabsiieomnet 4 Condsctor | RUCEM | $30.00
| are |
MICROPHONE ‘ON-OFF’ SWITCHES .
In mony microphone applications o switch is not wanted at the a:
microphone. Therefore switches ore not built into Shure Micro- :
phones. But, whenever a switch is needed these “On-Off” switches .
plug into the microphone quickly and conveniently. You can de-
pend on them. No soldering necessary.
Model A83A. Quickly attached to any cable-conmector type
Shure Microphone. Internal plug establishes connections. Bakelite
arrow knob.
Code: RUNIM List Price $4.35
| Model A84A. Momentary “On-Off” Switch, Press-to-talk ABIA
} Bokelite disc.
Code: RUNID List Price $4.90
Model A858. Momentary Relay-Type Switch. Normolly-open
switch closes circuit comprising one conductor ond shield of ovt- |
going cable for operation of relay or other device; remaining
conductor and shield of cable carry microphone output. Must be
used with two-conductor shielded cable, and only with crystal and SF
high impedance dynamic microphones. Stondord Shure cable-
connector receptocde, Satin Chrome finish. Bakelite disc. 134″
high x 14″ wide x 2” deep. Fumished without cable, Shipping
weight 34 pound. r -#
Code RUNAT List Price $8.20 Pan Assn
i SHURE
=== Page 11 ===
MODERN DESK STAND TAKE-APART STAND
4 Model S36A. Beautiful, stream- Model $348, Hendy low-cost Bt
lined Desk Mount with stable stond for desk or hond use. One
wpport ot correct height. Fits twist of handle locks it securely In |
. Shure connector-type Micro- bose for use as a table stand, or
y phones, concealing plug in releases hondle for use in hand.
base. Adopter plate and tub- Metal base, wood handle. Metal
ing provided for other type top threaded %”—27. Height
microphones. Removable but- over all 6116)”. Base diam. 4142″.
ton at front for instollation of Length of handle 5%”.Shpg.
%4″ standard bushing switch or wt. 1 Ib.
volume control. Pearl Gray Code RUKAB. List Price $2.15.
finish, Base: 2V2″ high, 5” wide, Model A418. Microphone
7? long. Shipping weight 114 pounds. Model S36A. Hondle. Threaded 4’—27.
Code: RUSEF. Ust Price $4.35 Code: RUJAD, List Price $.85
CABLE TYPE TRANSFORMER
Model A86A is a high-quolity cable-type transformer which offers additional
versatility when used in conjunction with Shure Models 55, 556, and 51 Dynamic
Microphones, which employ the impedance matching switch. It solves the frequent
problem of installations requiring long lengths of microphone cobles without
the loss of high-frequency response. Model A86A matches 35 to 50 and 150
to 250 oben microphones to high impedance omplifier input. Compoct, sturdy.
Case diometer 1%”, length 2%”, 7 foot cable. Shipping weight 1% pounds.
Model AB6A. Code: RUDEB. List Price $13.10 MODEL AS6A
FLOOR STANDS
The new Shure Floor Stands have been designed to look smort
and work perfectly. They will fit into any type of installation because
of their design and rich hammered finish. Stabilized base cushioning
reduces floor noise pickup by 10 to 18 db. Color: Pearl Gray.
(ne ee
aoou.| Sams [eee] baat | eee | 2. | coe | tee |
| S61 | Rowed 9 Mibs.) 12″ | 44″—68″ | 14 tbe. | RUSIT $17.50 |
| | $65 te 9h tbe.) 17H” | ds — TO” | 14 thy) RUSIV $2000 |
| Pictured at right is the new
7 Shure Locking Device that
is compact and sturdy, Just
push the button to raise or
lower the microphone. Life-
tested 5000 times. This lock
|e is precision made, will stand
up under rough and tumble
MODE S61 treatment. MOOR 565
SHURE
=== Page 12 ===
4 ! ~ ;
9) hye 4 z
om YN ; 1% So ne
’ ’ %, % ‘ S ‘
, f ’ tht eh att
ntyte pot aN ica N
; ! : ‘ *y , cure et? ween i vt >
tele at oe tet Fe,
tay Py 4 !° : yf “i y
’ ‘ ‘ OM
‘eit ! Fi ns z ? as Ht, part,
‘ ‘ ve ‘ ‘, t , ‘
ey ‘ a ee t
mm OG! ing
: ‘
| » . “MANY LEADING RADIO AND
| TELEVISION BROADCAST
a STATIONS ARE USING SHURE
. SUPER-CARDIOID DYNAMIC
i 4 MICROPHONES FOR STUDIO
2, AND REMOTE PROGRAMS
i> “Over 1000 In U, 3, alone,
: f = :
SHURE BROTHERS, Inc.
Microphones and Acoustic Devices
225 West Huron Street, Chicago 10, Ill. ©@ U.S.A. © Cable Address: SHUREMICRO
Crrviet Mimephore: Licensed Under Petears af Brosh Oeveinsmest Co. Copyright 1947 Share Beethers, Oveege, Prwted USA. 157.447.50M
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