University

Sound Inc.

Product Data

Ceiling Speaker Accessories

Mode1CB8-1

Round Backbox Loudspeaker

Enclosure

• For 8" loudspeaker baffles

• One piece 22 gauge drawn steel

• Knockouts for use with conduit

Specifications:

Diameter 9 3 /4" (24 .

8 cm)

Mounting 11114" (28.6 em)

Centers

Flange 12 5/16" (31.3 cm)

Diameter

Depth

41/16"

(10 .

3 em)

Baffle (4) #8-32 J-nuts

Mounts at 90 °

Knockouts (4) 1/2 3/4"

ModelGB8R

Ceillng Loudspeaker

Bame

• Fits standard 8" loudspeakers

• 22-gauge steel one-piece construcdon

• Powdered epoxy finish

• Screw attachment to all standard backboxes, plaster rings, and support bridges

Specifications:

Type One-step contour

Finish White-baked epoxy

Material 22-gauge steel

Mount 4 screw holes through baffle

ModelTB-l

Speaker Support

Bridge

• Fits standard 8" loudspeakers

• Accommodates round or square baffles

• One-piece steel construcdon

• Screw attachment to all standard baffles and backboxes

Specifications:

Baffle Types Round or square

Speaker Type 8" diameter speakers

Backbox Type Screw/ torsion mount, Round or square

Material All steel

ModelVC-l

Wall Mount

Autotransformer Attenuator

• Acts as remote volume control for one or more loudspeakers

• Handles up to 10 Watts power on either 25V or 70.7V speaker Hnes

• Bmshed steel faceplate fits standard electrical switch box

Specifications:

Power Rating 10 Watts

Alten Type Autotransformer

Positions 10, plus "0" (off) position

Total Alten 36 dB

Insertion Loss .5 dB

a MARK IV company

13278 Ralston Avenue

Sylmar, CA 91342-7607

FAX (818) 362-3463

PHONE (818) 362-9516

Mark IV Audio Canada

345 Herbert Street

Gananoque, Ontario K7G 2V1

FAX (613) 382-7466

PHONE (613) 382-2141

The protective round metal enclosure shall be the

University Sound Model CBS-1. The enclosure shall be constructed of painted, one-piece 22-gauge drawn steel and shall have applied in its interior a fire retardant, resonance damping material. The enclosure shall have a perforated steel mounting strap on the top , and four combination 112" - 3 / 4" knockouts .

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The ceiling loudspeaker baffle shall be the University

Sound Model GBSR . The baffle shall fit S"-diameter ceiling loudspeakers by means of four screws through four mounting holes in the baffle. The baffle shall be of a circular shape, and be constructed of 22-gauge cold rolled steel, treated with zinc for corrosion resistance . The finish shall be a white baked epoxy . There shall be a onestep contour in the baffle to provide an offset from the mounting surface . The baffle shall attach to all standard backboxes, plaster rings, and bridge supports with screws . The University Sound Model GBSR has been specified.

The ceiling speaker support bridge shall be the University

Sound Model TB-1 . It shall be sized to fit S" diameter ceiling speakers . The mounting hole shall be square, and well within the diameter of most round and square speaker baffles. The bridge shall have a multiplicity of mounting options, so as to accommodate round and square speaker baffles , round and square backboxes with or without torsion springs , and installations without any backbox.

The construction of the bridge shall be corrosive-resistant steel. The University Sound Model TB-1 has been specified .

The autotransformer attenuator shall be the University

Sound VC-1 mounted to a standard gang brushed stainless steel wall plate . The wall plate shall mount to a standard electrical junction box and shall be embossed with attenuator position indicators . The attenuator shall have two 6 dB steps for the first two positions and eight 3 dB steps for the third through tenth positions, and shall be able to accommodate 25 Volt or 70.7 Volt input lines. The switch shall have Silver-plated contacts. The power rating shall be 10 Watts, and the attenuation range shall be 36 dB. The University Sound Model VC-1 has been specified .

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