Extron electronic SF 228T manual Speaker Cabling, 70/100 V Audio Distribution System

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b.When using speaker wires without conduit — Secure the cable clamp adapter (included) to the cover plate and insert the wires through the clamp, (see the illustration below).

Cable Clamp

Adapter (Included)

Terminal Cover Plate

Seismic Cable Pass

Through Loop

Rear of Speaker

Speaker

Terminal

Figure 4. Using a Cable Clamp Adapter

Proceed to “70/100 V Audio Distribution System” on page 5 or “Direct 8 Ohm Connection to an Amplifier” on page 8 for the appropriate wiring procedure for either a distributed audio system (70 V or 100 V line distribution through the transformer) or for a direct (8 ohm) connection from an amplifier (bypassing the transformer).

Speaker Cabling

70/100 V Audio Distribution System

NOTE: In the 70 V or 100 V distribution system diagram below, an optional

speaker has been added as an example of daisy chaining SF 228T speakers to a single amplifier output.

To Next Speaker (terminal tap)

,

.

To Next Speaker (terminal tap)

,

V

70

 

 

V

100

 

 

.

V

70

 

 

V

100

 

 

From Amplifier ,

From Amplifier .

Figure 5. 70/100 V Terminal Connection

SF 228T Speaker System • Installation

5

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Contents ’ x 2’ Ceiling Speakers SF 228TSafety Instructions English FCC Class a Notice Conventions Used in this Guide Contents SF 228T Speaker System Contents About this User Guide FeaturesIntroduction SF 228T Application Example Application ExampleInstalling the Speakers InstallationInstallation Considerations Flexible Conduit Adapter 70/100 V Audio Distribution System Speaker CablingTerminal Cover With Transformer Side Exposed Proceed to Completing the Installation on Direct 8 Ohm Connection to an Amplifier Feet x 2 Feet Ceiling Tile Installation Completing the InstallationInstall the Seismic Safety Lines Specifications Specifications Dimensions PackagingNFPA90A, NFPA70 Part NumbersDimensions Packaging Extron Warranty