Electro-Voice US621L, US622L Quick Start Manual

e

EleclroVoice

Commercial

Microphones

US621L
US622L

DYNAMIC
MICROPHONES

•

Touch

•

7-foot,
bare-wire

•

US621l:
US622l:

noise-cancelling

DESKTOP

to

talk

5-conductor

termination

Omnidirectional

Cardioid,

cable

with

Description
These microphones were designed for com-

munications and paging applications. Both
models are also useful in amateur radio, CB,
aeronautical and commercial base station
installations.

US621L is an omnidirectional dynamic

The
microphone with wide-range frequency re­sponse making it an excellent choice for gen­eral-purpose and office paging applications.

US622L is a noise-cancelling dynamic

The
microphone designed for paging, dispatch­ing and call systems in which background

of

noise is high or for reduction
under difficult acoustical conditions. The
US622L allows the user to speak closely into
the microphone in a normal voice, while
background noise is greatly attenuated. The
frequency response was designed to ensure
excellent intelligibility.

The rugged, diecast stand is carefully bal­anced for handheld use as a
microphone, yet will remain firmly posi­tioned for
assembly will survive many hundreds
thousands
mate in reliability. The switch assembly may

be changed from

"touch to talk" use. The switch

of

use cycles--assuring the ulti-

"touch to talk" to "grip to

feedback

"grip to talk"

of

talk." The switch may be locked
position for "hands free" operation. There is
an adjustment screw that permits the lock­ing feature to be defeated. This control is
accessible only when the switch is located

"touch to talk" position.

in the

Locking
In the "touch to talk" position, the switch is

locked in the
switch bar and sliding it to the right.
switch assembly is mounted in the
talk" position, the switch bar should be de­pressed and slid upwards to lock.
the switch bar, reverse the procedure.

Defeating the Locking
With the switch

figuration, the locking feature may be de­feated by an adjustment screw located
through the access hole in the bottom plate
(see Figure 5). Rotating the screw fully

clockwise defeats the locking feature.
feat the switch locking feature in the
to
be made prior
bly to the neck location.
ing feature, tum the adjustment screw coun­terclockwise until locking is now possible.

Feature

"on" position by depressing the

Feature

in

the "touch to talk" con-

talk" configuration, the adjustment must

to

moving the switch assem-

To

in

the "on"

If

the

"grip to

To

unlock

To

de-

"grip

restore the lock-

Changing

The
switch connections as shown in Figure
microphones have shorted outputs in the
"off"
structions.

The switch assembly is easily accessible for
wiring revisions. First, remove the bottom
cover plate, then remove the two switch as­sembly screws to release the assembly for
easy access

Parallel

If

the US621L and US622L are to be used
applications such as multiple microphone
paging installations (where several units are
connected in parallel to a single microphone
input), changes must be made as shown
Figure
microphone output when the switch is in the
"off"

crophone applications.

Relocating Switch
The microphones are designed for

talk" or "grip to talk" operation. When re­ceived
mounted on the base for

Switch Connections

US621L and US622L are shipped with

6.

The

position. See Figure 6 for complete in-

to

switch terminals.

Operation

in

in

6.

Cutting the short wire "opens" the

position; this will allow multiple mi-

"touch to

from the factory, the

"touch to talk" use.

switch

is

US6Z 1 Land

US6ZZL

Dynamic

Microphones

H desired, the switch may be relocated with-

out wiring changes to the neck
phone for "grip to talk" operation.

To relocate the switch, proceed as follows:

Remove the black plastic cover from the

~

1.

c:

neck

of

o

..c

~

'E

S

...J 3.

N
N

\0

V'l

::l

"0

...J

~

V'l

::l

one end with a flat blade. This will expose

0.

o

...

the

u

cover, as it will be needed for the opening

u

on the base
Remove two screws and the cover plate

~

2.

c:

from the bottom
Slip the strain-relief spring from slot.

4. Remove the two screws located in the neck
of

Gently lift switch assembly away from

5.

c:

microphone housing.

~

6. Thrn the entire switch assembly so the top
surface
the microphone with wires protruding
from the bottom

7. Secure switch assembly in the neck with
the two screws.

8. Check the action
that all wires are properly seated and have
not become entangled in the switch assem-

bly.

9. Loop the cable around the bass located in

the housing base and seat the strain-relief
spring at the rear
Secure the bottom plate with two screws.

Place the black plastic cover into the open-

10.

ing
bar was previously removed) by inserting
the two tabs into the opening and snap­ping cover into position.

Architects'

The model
omnidirectional, dynamic type with uniform
frequency response from
model
cancelling dynamic type with uniform fre­quency response from 125-5,000 Hz. The mi­crophone output impedance shall be specified
150 ohms. The output level shall be
(0

dB=lm
case shall be
shall include a diecast zinc table stand inte-

the microphone by gently lifting

"grip to talk" switch opening. Save the

of

the microphone.

of

the microphone.

the microphone.

of

the switch bar faces the front

of

the switch.

of

of

on

the base (from which the red switch

and

Engineers'

US621L microphone shall be an

US622L microphone shall be a noise-

WIlO dynes/cm

of

Cycolac and diecast zinc, and

of

the switch to ensure

the microphone base.

Specifications

100-9,000 Hz. The

2

).

The microphone

the micro-

-57

dB

gral with the microphone case. The assembly

mm

shall be 246.1
(4.5 in.) wide x 122.2

A

DPDT

switch shall be provided, one sec-

tion

of

which shall normally short circuit the
transducer when switch is in "off" position.
(Provisions shall be made for connecting the
normally open mode in
ing the microphone circuit for
for multiple microphone paging installations.)
A second switch section shall be provided
with the capability to function either in an
tronic switching mode or for operation
ternal relay. A locking feature shall be pro­vided by means

"on"

position. A 2.13 m (7 ft) black plastic-

in
jacketed, five-conductor, two-shielded cable
shall be furnished. The finish
stand and microphone shall be nonreflecting
blue-black. Net weight shall be 822 g

of

13 oz).
The Electro-Voice commercial microphones

US621L and US622L are specified.

Unifonn

Electro-Voice products are guaranteed against
malfunction due to defects in materials
workmanship for a specified period, as noted
in
below,
or
of
curs during the specified period, the product
will be repaired
without charge. The product will be returned
to the
Limitations:
apply to: (a) exterior finish or appearance; (b)
certain specific items described in the
vidual product-line statement(s) below, or in
the individual product data sheet
manual; (c) malfunction resulting from use or
operation

fied
manual; (d) malfunction resulting from mis­use
tion occurring at any time after repairs have
been made to the product by anyone other than
EVI Audio
service representatives.

Limited

the individual product-line statement(s)

or

in the individual product data sheet

owner's

original purchase.

customer

of

in

the product data sheet

or

abuse

(9.69 in.) high x 114.3

mm

(4.81 in.) deep.

"off"

position and clos-

of

which switch may be locked

Warranty

manual, beginning with the date

If

such malfunction oc-

or

replaced (at

prepaid.

The Limited Warranty does not

the product other than as speci-

of

the product;

Service

or

any

Obtaining

Exclusions

or

of

mm

"on"

position

elec-

of

ex-

of

the integral

(lib,

Statement

our

option)

and

indi-

or

owner's

or

owner's

(e) malfunc-

its authorized

Warranty

Service: To obtain warranty service, a cus­tomer must deliver the product, prepaid, to
EVI Audio
service representatives together with proof
purchase
sale
service

EVI Audio Service at 600 Cecil Street, Bucha-
nan,
616/695-4743).
tial
replacement and return
the only remedies provided to the customer.
Electro-Voice shall not
cidental
ing, without limitation, injury to persons
property
allow the exclusion or limitation
or consequential damages
tation
Other
cific legal rights, and you may 'also have other
rights which vary from state to state.

Electro-Voice
anteed against malfunction from any cause for
two (2) years from the date
chase. In addition, the Limited Warranty for

or

the acoustic system contained in these micro­phones shall apply for the life
defined as a period
date that the manufacture
crophone has been discontinued. Any and all
active electronics incorporated in these micro­phones are guaranteed against malfunction due
to defects in materials
period
nal purchase. The Limited Warranty does not

extend to cables, cable connectors, or switches.
Additional details are included in the Uniform
Limited Warranty statement.

For warranty repair, service information, or a
listing
tact
616/695-6831

For
Support at 800/234-6831 or 616/695-6831, M­F, 8:00
time.

Specifications subject to change without no­tice.

Service

of

the product in the form

or

receipted invoice. A list

representatives

MI

49107

Damages

or

consequential

or

or

exclusion

Rights: This warranty gives you spe-

of

three (3) years from the date

of

the repair facilities nearest you, con-

the

service

technical

a.m. to 5:00 p.m. Eastern Standard

or

any

of

is

available

(800/234-6831

Incidental

Excluded:

loss

of

Wired

often

repair

or

800/685-2606.

and

Product repair

to

the

be

liable for any in­damages

use. Some states do not

so

may

not apply to you.

Microphones

of

(10) years from the

of

the specific mi-

or

workmanship for a

department

assistance, contact Technical

its authorized

of

a bill

of

authorized

from

or

FAX

Consequen-

customer

of

the above limi-

original pur-

of

the product,

are

includ-

incidental

are guar-

of

origi-

at:

of
of

or

or