Toa PC-671R Manuel utilisateur

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TOA PC SERIES

FLUSH MOUNT

SPEAKER ASSEMBLIES

PC-671R PC-671RV

FEATURES

l8" loudspeaker assembly with integral 25V/70V transformer and round baffle.

lOnly 2.5" depth allows mounting in partitions and other shallow spaces.

lMulti-tap transformer with heavy duty silicon steel core to prevent saturation at maximum power.

lAvailable with a rugged baffle mounted volume control. [PC-671RV]

lContaminant and corrosion resistant baffle and volume control.

DESCRIPTION

Both models in this PC Series are completely factory assembled

utilizing an eight inch (15 watt program) driver specifically designed

for low level (0.5 to 6 watt) distributed sound systems. This driver in

conjunction with its associated baffle (grille) will provide uniform

dispersion characteristics over a broad frequency range.

The dual (25 and 70 volt) line transformer has a high saturation

factor due to its heavy duty silicon steel core. In usual applications

of 0.5 to 2.0 watts or in extreme 6 watt situations, frequency

response characteristics will not be impaired by saturation. The dual

voltage feature allows the convenience of one model for all line

voltage applications.

The ‘V’ suffix model has a center baffle mounted, screw driver

adjustable Volume Control. TOA design engineers devised this

control to withstand heat, fumes and contaminants that are

associated with ceiling mount installations. This durable,

conservatively designed volume control will provide a long, noise

free service life. The control shaft is provided without a knob to

prevent unauthorized tampering. Its slotted end allows the

technician to quickly balance system levels without high labor costs.

Both PC models have a nominal 2½ inch (behind the grille) depth

which will allow mounting in most partitions, walls and other

shallow spaces. Mounting holes conform to most standard back

boxes. Assembly components are not separately available.

Specifications

PC-671 ASSEMBLIES

The PC-671 group consists of two models. The baffles

are CRS with a white paint finish specially formulated

to resist corrosion and provide excellent undercoat

bonding.

DriverSize,lmpedance

Nominal 8", 8Ω

Power Handling

15WattsProgram

Magnet Material, Weight Ferrite,5.3oz.

Flux Density

10,300Gauss

Frequency Range

90 Hz-16k Hz

Sensitivity

96dB

Transformer

Dual Secondary winding, 25 or 70V

Transformer Power Taos

0.5W, 1.0W, 2.0W, 3W and 6W

Insertion loss <1.5dB

Volume Control Contaminant Resistant, Screwdriver adjust

NominalAssemblyDepth

2.5" Behind Baffle

Size/Diameter

Round: 13.4" O.D.

Assembly Weight

3.5Ibs

Specifications are subject to change without notice

ARCHITECT’SANDENGINEER’SSPECIFICATIONS

The ceiling/wall mount loudspeaker shall be an integrated cone

driver, line transformer and baffle (grille) assembly. The driver shall

be an 8" diameter cone type with an 8 Ohm nominal impedance

and a 5.3 oz ferrite magnet. Power handling shall be 6 watts RMS

(15 watts program) with a frequency response from 90HZ - 16KHZ

and sensitivity of 96 dB SPL at 1 watt input measured at a distance

of 1 meter. The line transformer shall accept 25V and 70V inputs

with taps for 0.5W, 1W, 2W, 3W and 6W with an output

impedance of 8 Ohms with less than a 1.5 dB insertion loss. The

baffle shall be made of CRS with a white, corrosion resistant paint

finish. [A screwdriver adjustable, noise free volume control shall

be mounted in the center of the baffle easily accessible for

adjustment when the assembly is installed. The volume control

shall withstand heat, fumes and other airborne contaminants].

The baffle shall be 13.4" O.D. with a 2.5" depth for the assembly

behind the baffle. Holes shall be provided in the baffle for

mounting to standard loudspeaker backboxes. Weight for the

assembly shall be 3.5 lb. The ceiling/wall mount loudspeaker shall

be the TOA PC-671R [PC-671RV].

Telephone: (415) 588-2538

FAX: (415) 588-3349

TOA Electronics, Inc., 601 Gateway Boulevard

South San Francisco, California 94080

Printed in U.S.A. 10-94-C