Shure 709 User Guide

222
HARTREY
AREA CODE 3121866-2200 . CABLE: SHUREMICRO
TWX: 910.231-0048 TELEX: 72-4381
AVE.,
EVANSTON.
IL.
60204
U.S.A.
1
OPERATION AND SERVICE INSTRUCTIONS
MODEL
rnGiim3imTM
SPEAKER SYSTEM
I
DESCRIPTION
The Shure Model 709 PRO MASTERTM Speaker System
-a wide-range high efficiency, lightweight, portable, two-way speaker system- is an ideal companion unit to Shure's 700 Series PRO MASTER Power Consoles similar high-power amplifiers. The Model 709 provides high SPL sound reinforcement of wide frequency range program material in locations ranging from the largest clubs to the most intimate lounges. The speaker system consists of
cabinet and three piezoelectric horns.
The 709 system has a frequency response of 50 to 20,000 Hz and an impedance of 8 ohms. The system is designed to operate with amplifiers capable of delivering
up to 150 watts continuous to an 8-ohm load.
The 709 is constructed of 15.9 mm covered in scuff-resistant black vinyl. The black fabric grille is rugged, cleanable, and easily removable and re-
placeable. The corners of the cabinet are equipped with
steel protectors. The 709 weighs only 20.4 kilograms
(45 Ib) and can be easily carried by grasping the cabinet
at the top and sides of the horns. Proper lifting tech-
niques should be observed when handling any 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
cable pocket is available as Model be wall-mounted using the optional Model Mount Swivel Bracket.
a
15-inch woofer in a front-ported bass-reflex
(5/8
in.) wood and
A709C. The 709 can
A112D Wall
or
SPECIFICATIONS
Power Rating
. . .
. . . .
.
.Maximum recommended ampli-
fier output to 8 ohms: 150 watts continuous, 34.6 Vrms, 55V peak
Impedance Frequency Response
Sound Pressure
Level (SPL)
Phasing (Polarity)
High Frequency
Section
Low Frequency
Section Horizontal Distribution. Vertical Distribution
Directivity Factor
R,
Environmental:
Operating
Temperature
Storage
Temperature
Connectors Cable
Overall Dimensions
(including feet)
Weight Construction
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.
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(Q)
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.8 ohms nominal (see Figure
.
.50 Hz to 20 kHz (see Figure .EIA rating: 53 dB at 9.2m (30 ft)
1 milliwatt, equivalent to
from 102 dB at Im (3.3 ft) with
I-watt input
.Positive voltage on phone jack
tip produces positive sound pressure
.Three piezoelectric horns .15-inch woofer
.
120' (see Figure 3)
.SO0 .6.3 at 2 kHz
-
7 to 43OC (20 to 11
. .
-29 to 7I0C (-20 to 160°F)
.
.Two parallel-wired phone jacks
.
.
. .
(50 ft), 18-gauge,
.15m
jacketed, with phone plugs
.638 mm H x 584 mm W x 402
mm D (25-1/8 in. x 23 in.
15-13/16 in.)
.20.4 kg (45 Ib)
.15.9 mm (5/8 in.) wood, black
vinyl covering, black fabric grille, steel corner protectors,
plastic feet
O0
1)
2)
F)
rubber-
x
Copyright
27A8002
(TJ)
1980,
Shure
Brothers
Inc.
Printed
in
U.S.A.
Optional Accessories
TYPICAL IMPEDANCE CURVE
.
.
A709C, Protective Slip-On Cover
with Cable Pocket; Wall-Mount Swivel and Tilt
Bracket;
former
FREQUENCY IN HERTZ
FIGURE
A102A, 70-volt Trans-
1
A112D,
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 center of the speaker from the last rows of the audience area.
If it is desirable to elevate the 709, 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 20.4 kg (45 Ib) weight of the speaker.
For greater elevations, the optional accessory Model A112D Wall Mount Swivel Bracket is designed to support the 709 for wall mounting only. It is important to note that the 709 is not designed for mounting by simple chains or cables to the cabinet top or sides. If the 709 must be supported by chains or cables, encircle or cradle it.
WARNING
It is extremely important that both the mounting surface and the mounting hardware are adequate to support the weight of the speaker. Inadequate sup­port may result in a hazardous operating condition. Whatever mounting means are employed, support should be provided for a speaker static load of
81.7 kg
20.4 kg (45 Ib).
(180 Ib). Actual weight of the speaker is
TYPICAL FREQUENCY RESPONSE
FIGURE
LEGEND LEGEND
-----
500
Hz
2
.
.
. .
. .
. . . .
. .
TYPICAL POLAR PAllERNS
FIGURE
3
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
HOOKUP
Amplifiers
The 709 is designed for use with the Shure 700 Series Power Consoles and similar amplifiers having the follow­ing maximum power output capabilities.
8 ohms 4 ohms
(55V peak)
Speaker Wiring
Fifteen meters (50 ft) of cable is supplied with each 709 Speaker System. For convenient attachment, a straight phone plug and a right-angle phone plug are provided. Connect either end to the back of the speaker and to the Power Consoie amplifier. The supplied cable
is 18 gauge (No. 18 AWG) and can be used for cable runs of up to 15m (50 ft) between the speaker and the ampli­fier. If cable runs longer than 15m are required, use the following table to determine the correct wire gauge.
Maximum
Distance From
Power Console Amplifier Wire Gauge Recommended Cables
15m (50 ft) AWG 18 Belden 30m (1 00 ft) AWG 16 Belden #8470, #8471, 60m (200 ft) AWG 14 Belden
#8460, #8461,
#9470, #8542
#
8472
#8473
Preferably, each speaker should be connected to a separate amplifier output jack to minimize power losses in the cable. Two parallel-wired jacks are provided on the back of each 709 Speaker System. This allows con-
B.
Phase distortion-a type of distortion distinguish-
able by being heard only in parts of the audience
area-can be due to overlapping areas of
er coverage or sound reflecting off hard surfaces.
speak-
necting two speakers by connecting the first speaker to Re-aim the speakers to eliminate this kind of the amplifier and the second speaker to the first. may be helpful in certain room shapes. However, when speakers are connected in this manner, the next heavier wire gauge is recommended between the amplifier and the first speaker. Therefore, for two speakers connected together where the first is at a distance of
30m (100 ft) from the amplifier, use No. 14 AWG cable between the amplifier and the first speaker; for two speakers where the first is at 15m (50 ft), use No. 16 AWG cable between
This distortion.
Use an equalization analyzer system to supply and analyze a pink noise signal. An octave equalizer like the ones found on the Shure 700 Series PRO MASTERTM Power Consoles (or separate equalizers
like the Shure Models to adjust the sound system for optimum equalization and maximum gain before feedback.
SR107 and M610) can be used
the amplifier and the first speaker. When positioning the speaker cables, place them where the audience, per­formers or passers-by will not trip over them.
To avoid frequency response aberrations, poor cover­age, and dead zones caused by improper speaker phas­ing in multiple speaker installations, all speakers must be wired with the same polarity. The cables listed in the chart above are color-coded to ensure that identical con­nections are used. Note that even common 18-gauge lamp cord ("zip" cord) is phase-coded with ribs along the outer jacket of one conductor.
The cable can be stored in the convenient snap-pocket
of the optional slip-on cover for the 709 speaker.
25-Volt Line Operation
The 709 can be operated from a 25-volt line without
the need for an accessory transformer. Note that the
speaker will draw 78 watts when connected to a
constant-
voltage, 25-volt line.
SERVICE INSTRUCTIONS
Diagnosing the Problem
1. Disconnect the speaker cables.
2.
To check woofer continuity, using an ohmmeter, measure the resistance between the tip and sleeve of either phone jack. The dc resistance should be
5.5 to 6.5 ohms. A clicking sound will be made by a "good" woofer when an ohmmeter is connected or disconnected.
3. The piezoelectric horns are capacitive and cannot be measured with an ohmmeter (the capacitive value of each horn should be between 0.25 and 0.38
4.
For access to the piezoelectric horns, remove the four screws holding the selected horn in the cabinet. Carefully move the freed horn to the wider part of
pF).
the cabinet opening, and pull the horn forward and
70-Volt Line Operation
For operation from a 70-volt line, a transformer such
as the Shure Model
A102A, providing power taps of 50,
25, 12, and 6 watts, should be used.
out of the cabinet.
5. To test the individual speakers, apply a small ac voltage from an oscillator and amplifier to each
speaker individually. Use approximately 4V, 50 Hz to 3 kHz for the 15-inch woofer, and approximately
CHECKING SOUND COVERAGE
After the 709 speakers, Power Console amplifiers,
and other equipment have been installed and connected,
2V, 2 kHz to 8 kHz for each high-frequency horn. As the test signal frequency is varied, any erratic
buzzes or rattles indicate possible problems.
sound coverage can be checked as follows.
1. Apply a fairly constant-level signal to the system (preferably low-level pink noise* or program mate­rial) and walk around the audience area. Listen for a smooth, even output from the speakers, with min­imal differences in volume and tone, and no "dead" spots or phase distortion.
A. A dead spot-for audio purposes, where no direct
sound is heard or where the sound level is ap-
preciably lower-may mean that the speakers
Sound pressure levels generated by this test may be damaging to your hearing. Aim speakers away from listeners and toward sound-absorbent material (curtains, blanket, etc.) Carefully adjust test signal amplitude to avoid unnecessarily high sound pres­sure levels for prolonged periods.
WARNING
are not covering that area, or that the speaker wires are connected out-of-phase. Proper phas­ing can be readily determined by checking the connections on each speaker, but inadequate coverage generally requires repositioning the speakers. The dead area should be examined
6. To reassemble, connect the horn leads: red lead to the coded terminal, black lead to the other terminal. Reinsert in the cabinet and tighten the four pre­viously removed screws.
carefully to determine that the problem can be corrected without resorting to auxiliary speakers.
*
Sine-wave signals delivering
because they present a much greater average power than does pink noise or program material. Consequently, when setting up or adjusting system with the test signals.
709
150
watts to a speaker should be avoided
a
speaker, avoid the use of high-level, continuous-type
sound
Woofer Replacement and Jack Panel Access
1. Remove the grille by pulling the two tabs at the top.
2.
Remove the eight screws that hold the woofer in place.
3.
Pull the woofer forward out of the cabinet and dis­connect the red and black leads from the woofer 50, 25, 12, and 6 watts for 70-volt distributed systems, terminals. The woofer is now free from the cabinet and can be lifted out and removed. Take care not to damage the cone nor to break the leads when performing this operation.
4. Before replacing the woofer, connect the leads: red lead to the coded terminal.
5. When reassembling, insert the woofer in the cabinet and tighten the eight previously removed screws.
6.
Press the grille back in place.
ACCESSORIES
The following optional accessories are available for
use with the 709 PRO
A709C Slip-On Protective Cover
that provides protection for the speaker. Has cutouts for the cabinet projections used as carrying handles. Equipped with a snap-pocket for cable storage.
A112D Wall Moun? Swivel Bracket
of the speaker about a horizontal axis, and horizontal rotation when mounted on a vertical surface. Heavy-duty steel construction.
MASTERTM Speaker System.
is a heavy vinyl cover
permits 90' rotation
120" of
A102A 70-Volt Transformer
and impedance taps of 8 and 16 ohms. Mounts easily to the back of a speaker or convenient surface.
GUARANTEE
This Shure product is guaranteed in normal use to be free from electrical and mechanical defects for a period of one year from date of purchase. Please retain proof of purchase date. This guarantee includes all parts and labor. This guarantee is in lieu of any and all other guar­antees or warranties, express or implied, and there shall be no recovery for any consequential or incidental damages.
SHIPPING INSTRUCTIONS
Carefully repack the unit and return it prepaid to:
Shure Brothers Incorporated Attention: Service Department 1501 West Shure Drive Arlington Heights, Illinois 60004
If outside the United States, return the unit to your dealer or Authorized Shure Service Center for repair. The unit will be returned to you prepaid.
provides wattage taps of
CIRCUIT DIAGRAM
REPLACEMENT PARTS LIST
Reference
Designation
J1, J2
LS1 LS2-LS4 MPI M P2 M P3 M P4 R1 W1
*
Parts listed as RKC Kits should be ordered by that kit number. Any orders received is shown will be shipped in RKC quantities.
4
Replacement
Kit No.*
-
RKC158 RKC165
-
-
-
-
RKC4
Qty.
1
1
-
-
-
-
1
FIGURE
Part No.
90BA2600
808363 80A372 90A2768
65A999A 53A1656B 53A1563C 45HC100D 900373
4
Replacement Kit Consists
Connector, Phone Jack, 2-Conductor,
Open Circuit
15-inch Loudspeaker
Piezoelectric Horn Grille Assembly Foot, Plastic Corner Protector, Rear Corner Protector, Front Resistor, Cable Assembly, 15.2m (50 ft), with
Male Phone Plugs
LSI
Of:
Description
Ion,
10W
for
piece parts where RKC Kit number
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