Shure 711 User Guide

222 HARTREY AVE.. EVANSTON. IL. 60204 U.S.A.

D

I

@r

MICROPHONES

AREA

CODE 312/866-2200 CABLE:

TWX: 910-231-0048 TELEX: 72-4381

AND ELECTRONIC

COMPONENTS

SHUREMICRO

1

DATA

SHEET

1

MODEL

711

LOUDSPEAKER SYSTEM

VARADTM AND SIT EQUIPPED

I

OPERATION AND SERVICE INSTRUCTIONS

DESCRIPTION

The Model 71 1 Professional Loudspeaker System

consists of an all-new Shure-designed and

-manufactured 15-inch
a Shure-designed and -manufactured high-power high­frequency driver, and a unique
dispersion horn with sliding vanes to set 60°, 90° Left,
90° Right, or 120° coverage angles. The Model 711
Speakers can be used individually or in combination to

provide high-SPL sound reinforcement of wide frequen-

cy range program material in any shape or size of

room-from the most intimate club to the largest

auditorium.

The 711 system has a frequency response of 56 to

14,000 Hz and an impedance of 8 ohms. The system is

designed to operate with amplifiers capable of deliver-

ing up to 150 watts continuous to an
range operation and up to 200 watts low-frequency
when biamplified. The 711

that automatically converts to biamplif ied operation. In

addition, two low-frequency
parallel-wired to permit cascading speakers as well as
connecting each speaker to a separate amplifier output.

The 711 has built-in passive low-frequency and high­frequency crossover networks for optimum acoustic
matching and speaker protection.
overload protection circuit safeguards the high­frequency driver against damage from unusually high-

level signals.

The speaker system is housed in a front-vented
Thiele-Small aligned bass reflex cabinet constructed of

(5/s

15.9 mm

resistant black vinyl, with steel corner protectors and
durable plastic feet. A handsome metal grille that pro­tects the woofer can be easily removed or permanently
attached (see page 2). The 71 1 weighs 30 kg (66 Ib) and
can be carried by grasping it at the top and sides of the
cabinet corners. Proper lifting techniques should be
observed when handling equipment of this size and
weight.

A heavy-duty 15m (50 ft), 18-gauge, rubber-jacketed
connecting cable with phone plugs is supplied with the
speaker. A rugged vinyl slip-on protective cover with a

Copyright

27A8006(AH)

1981,

in.) plywood, covered in strong, scuff-

Shure Brothers

Shure Music Transducer

VARADTM variable-

&ohm load for full-

features a switching jack

andlor full-range jacks are

In

Inc.

woofer,

addition, an

cable pocket is available as Model A711C.

SPECIFICATIONS

Power Rating

Maximum recommended amplifier output to 8 ohms:

Full Range: 150 watts continuous, 34.6 Vrms, 55V
peak;

Biamplified-Low Frequency: 200 watts continuous,
40 Vrms,
continuous, 34.6 Vrms, 55V peak.

Frequency Response

56 to 14 kHz k5 dB (see Figure 1)

TYPICAL

Impedance

8 ohms rated (see Figure 2)

Crossover Frequency

2 kHz; low frequency: 12 dBloctave;

63.5V peak; High Frequency: 150 watts

'/3

OCTAVE FREQUENCY RESPONSE

(HORN SET AT

FIGURE

FREOUENN

TYPICAL IMPEDANCE

FIGURE

high frequency: 18 dBloctave

120')

1

IN

HERTZ

2

Printed

in

U.S.A.

Sound Pressure Level

101 dB at

1m with 1W input (2.83V)

Phasing (polarity)

Positive voltage on phone jack tip produces positive
sound pressure (woofer cone moves out)

High Frequency Section

120°, 90°L, 90°R, or 60° (selectable) radial horn;
High-power driver,

1 %-inch voice coil

Low Frequency Section

15-inch SMT woofer,

2lh-inch voice coil

Horizontal Distribution

120°, 90°, or 60° (see Figure 3)

HORN

----

-

.......

0

2 kHz

4

kHz

8

kHz

Connectors

Two parallel-wired phone jacks for full-range opera­tion, or low frequency only in biamp mode; One
switching jack for high-frequency input in biamp
mode

Cable

15m (50 ft) 18-gauge, rubber jacketed with phone
plugs

Overall Dimensions (including feet)

702

mm H x584 mm W x 402 mm D(27% in. x23 in. x

1513/16 in.)

Weight

30 kg (66 Ib)

Construction

mm

(%

15.9

in.) plywood, black vinyl covering, black

steel grille, steel corner protectors, plastic feet

INSTALLATION

General

Maximum coverage for source-oriented installations
is generally obtained with the speakers on both sides of
the sound source and as far forward as possible. Each
speaker is tilted slightly either downward (for wall- or
ceiling- mounted units) or upward (for floor-standing
units). The angle of tilt (assuming a single speaker to
each side of the sound source) should be such that you
can look into the throat of the horn from the last rows of

the audience area covered by the speaker.

If it is desirable to elevate the 711, adequate support
for heights up to about one meter (three feet) can usual­ly be obtained using a sturdy table or bench. The sur­face must be capable of supporting the 30 kg (66 Ib)

weight of the speaker. For greater elevations, it is im-

portant to note that the 711 is not designed for moun-

ting by simple chains or cables attached to the cabinet
top or sides. If the speaker is to be supported by chains
or cables, encircle or cradle it.

90DR

6O'HORN

.....

-

.......

2

kHz

4

kHz

8

kHz

..--

-

......

HORN

2

4

8

kHz

kHz

kHz

TYPICAL POLAR PATTERNS

FIGURE

3

Vertical Distribution

60°

Directivity Factor Re

(Q)

500 Hz: 5.2
1 kHz: 7.1

HORN ANGLE

120° 90° 60°

---

2 kHz: 6.6 7.3 15.3
4 kHz:

10.3 16.7

21.6

Environmental

Operating Temperature: -7 to

43OC (20 to llO°F)

Storage Temperature: -29 to 71°C (-20 to 160°F)

WARNING

It is extremely important that both the mounting
surface and the mounting hardware are adequate
to support the weight of the speaker.
support may result in a hazardous operating con­dition. Whatever mounting means are employed,
support should be provided for a speaker static
load of 120 kg (264 Ib). Actual weight of the
speaker is 30 kg (66 Ib).

If the speaker is elevated and tilted down, it is
desirable to attach the grille permanently. Do this
by driving screws or nails through the grille frame
into the cabinet, or through the sides of the
cabinet into the grille frame.

Coverage Angles

The 71 1 Speaker System features a unique horn with
sliding vanes to set variable horizontal dispersion pat­terns. The

120°, 90° Right, 90° Left, or 60° angle
choices provide unprecedented flexibility, making the
711 the one ideal speaker in a variety of circumstances
that previously required separate kinds of units to en­sure adequate coverage.

Inadequate