Shure VA301-S Operating Manual
222 H A R T R E Y AVE. EVANSTON, IL. 60204 U.S.A.
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TWX: 910-231-0048 |
TELEX: 72-4381 |
MODEL VA301-S |
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SPEAKER COLUMN |
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A R E A CODE 312/866-2200 |
CABLE: S H U R E M I C R O |
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OPERATING MANUAL AND SERVICE INSTRUCTIONS
The Shure Model VA301-S Speaker Column has been designed as a monitor to provide localized on-stage coverage for the performing vocalist. When used in conjunction with the Shure VOCAL MASTER@VA300 or VA302 Series Consoles or POWERMASTER@PM300 Series Amplifiers, the Model VA301-S provides high quality localized sound coverage.
An integral volume control is incorporated in the VA301-S to allow on-stage use at as high a sound pressure level as possible without feedback. A rear-ported enclosure is utilized which contributes to the directional characteristics of the speaker column and is critical in reduction of feedback.
The VA301-S employs two 8 in. loudspeakers and one 10 in. loudspeaker. Total cone area of the VA301-S is 1,155 square cm (179 sq. in.). Nominal impedance of the VA301-S Speaker Column is 32 ohms when the volume control is set at "10" (fully clockwise). Reduction of volun~e control setting reduces the overall volume and increases the impedance of the speaker system. At a setting of "0" there is no output from the Speaker Column. It is important to set the speaker volume control at "10" when the VA301-S is the only speaker connected to an amplifier, then use the amplifier volume control to adjust the volume of the speaker.
A 15.2m (50 ft), heavy duty cable is supplied with each VA301-S Speaker Column. The end of the cable with the straight plug and locking ring connects to the amplifier; the end with the right angle plug connects and locks to the Speaker Column. The cable can be stored in the cable-well at the base of each column. Connect the cable from either of the phone jacks on the back of the amplifier. If both of the speaker jacks on the amplifier are being used for other speakers, then connect the speakers in cascade - that is, connect the VA301-S Speaker cable to one of the unused phone jacks on the rear of one of the other speakers.
The Shure VA300 or VA302 Series Consoles and the PM300 series Amplifiers are designed to deliver full rated power (100W) to an 8-ohm load. Each VA300-S Speaker Column (two supplied with each VA300, or VA302 series VOCALMASTERSystem) has a nominal impedance of 16 ohms. The table below indicates the load impedance for a number of VA300-S and VA301-S speaker combinations. Speaker loads of less than 5.3 ohms should not be used with these amplifiers. No damage to the speakers or amplifier will occur but thermal shutoff of the amplifier may result.
The following list shows the resultant impedance loads obtained from a variety of speaker combinations.
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IMPEDANCE |
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IMPEDANCE |
QUANTITY |
and SPEAKER MODEL |
OHMS |
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QUANTITY |
and SPEAKER MODEL |
OHMS |
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1 |
VA300-S |
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16 |
6 |
VA301-S |
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5.3 |
2 |
VA300-S |
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8 |
1 |
VA300-S |
and 1 VA301-S |
10.6 |
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3 |
VA300-S |
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5.3 |
1 |
VA3OO-S |
and |
2 |
VA301-S |
8 |
1 |
VA301-S |
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32 |
1 |
VA300-S |
and |
3 |
VA301-S |
6.4 |
2 |
VA301-S |
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16 |
1 |
VA300-S |
and |
4 |
VA301-S |
5.3 |
3 |
VA301-S |
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10.6 |
2 |
VA300-S |
and |
1 |
VA301-S |
6.4 |
4 |
VA301-S |
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8 |
2 |
VA300-S |
and |
2 |
VA301-S |
5.3 |
5 |
VA301-S |
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6.4 |
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Any |
of |
the above combinations of |
speakers will provide loads suitable for |
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use |
with the VA300, VA302 Series |
Consoles |
or PM300 |
Series |
Amplifiers. |
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SPECIFICATIONS
MODEL VA301-S SPEAKER COLUMN
Power Rating:
Impedance:
Frequency Response:
Horizontal Distribution:
Vertical Distribution:
Dimensions:
Weight:
Construction and Finish:
Supplied Accessories:
Optional Accessories:
50 watts
32 ohms (Volume Control at "10")
50 to 10,000 Hz
See Figure 1-Polar |
Response |
60" |
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914 mm (36 in.) |
highX400 mm |
(15% in.) wideX222 mm (8% in.) deep
18.8 kg (41?hIbs) including cable
19 mm (%I in) wood construction, gray vinyl covering, black grille, anodized aluminum hardware
15.2m (50 ft), No. 18 gauge,
2-conductor rubber-jacketed cable with locking phone plugs attached
A3S-S Speaker Stand
A3 1PC-S Protective Cover ASO-XC 15.2m (50 ft) Extension Cable
Copyright 1979, Shure Brothers Inc. |
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27A925 (SG) |
(OVER) |
F]LEGEND
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HORIZONTAL POLAR RESPONSE
Figure 1
Printed in U.S.A.
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