Optional Accessories . .A709C, Protective Slip-On Cover with Cable Pocket; A112D, Wall-Mount Swivel and Tilt Bracket; A102A, 70-volt Transformer
FREQUENCY IN HERTZ
TYPICAL IMPEDANCE CURVE
FIGURE 1
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.
W A R N I N G
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
81.7kg (180 Ib). Actual weight of the speaker is
20.4kg (45 Ib).
TYPICAL FREQUENCY RESPONSE
FIGURE 2
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.
LEGEND |
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LEGEND |
----- 500 |
Hz |
............ |
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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 wallor ceiling-mounted units) or upward (for floor-standing
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 |
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Distance From |
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Power Console |
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Amplifier |
Wire Gauge |
Recommended Cables |
|
15m (50 ft) |
AWG |
18 |
Belden #8460, #8461, |
|
|
|
#9470, #8542 |
30m (100 ft) |
AWG |
16 |
Belden #8470, #8471, |
|
|
|
# 8472 |
60m (200 ft) |
AWG 14 |
Belden #8473 |