Extron electronics SF 228T User Manual
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Extron electronics SF 228T User Manual

2' x 2' ceiling speakers
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User Guide
Audio Products
SF 228T
2' x 2' Ceiling Speakers
68-2018-01 Rev. A
05 11

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Summary of Contents for Extron electronics SF 228T

  • Page 1 User Guide Audio Products SF 228T 2’ x 2’ Ceiling Speakers 68-2018-01 Rev. A 05 11...
  • Page 2 Safety Instructions • English Warning Power sources • This equipment should be operated only from the power source indicated on the product. This This symbol is intended to alert the user of important operating and mainte- equipment is intended to be used with a main power system with a grounded (neutral) conductor. The third nance (servicing) instructions in the literature provided with the equipment.
  • Page 3 FCC Class A Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. Operation is subject to the following two conditions: This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation.

  • Page 4: Conventions Used In This Guide

    Conventions Used in this Guide In this user guide, the following are used: NOTE: A note draws attention to important information. TIP: A tip provides a suggestion to make working with the application easier. CAUTION: A caution indicates a potential hazard to equipment or data. WARNING: A warning warns of things or actions that might cause injury, death, or other severe consequences.

  • Page 5: Table Of Contents

    Completing the Installation ......... 9 Specifications, Dimensions and Packaging ... 11 Specifications ............ 11 Part Numbers ............ 12 Included Parts ..........12 Optional Parts and Accessories ...... 12 Dimensions ............13 Packaging ............14 SF 228T Speaker System • Contents...
  • Page 6 SF 228T Speaker System • Contents...

  • Page 7: Introduction

    The SF 228T is designed for use in plenum rated ceiling spaces and can be mounted into a standard 2 feet x 2 feet or 2 feet x 4 feet (with supplied cross bars) false ceiling tile space on a T-bar grid, or, a frame installed in solid ceilings.

  • Page 8: Application Example

    Plenum 2' x 2' Ceiling Speaker A 10 W IR /VID Extron SI GN XPA 1002 Power Ampli er Extron SF 228T Plenum 2' x 2' Ceiling Speaker Figure 1. SF 228T Application Example SF 228T Speaker System • Introduction...

  • Page 9: Installation

    Installing the Speakers Power down — Power down all attached devices before proceeding. Remove the suspended ceiling tile — Remove the ceiling tile where the SF 228T will be installed and lay it aside. SF 228T Speaker System • Installation...
  • Page 10 Terminal Cover Plate Seismic Cable Pass Through Loop Rear of Speaker Speaker Terminal Figure 3. Flexible Conduit Adapter NOTE: Installation of conduit and conduit adapters should conform to all applicable building codes and local ordinances. SF 228T Speaker System • Installation...

  • Page 11: 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)
  • Page 12 Pay close attention to the polarity of the wires. Do not mix negative and positive wires. Red Wire From Amplifier (+) Black Wire From Amplifier (−) Figure 7. Secure Wiring to Terminal Block Use a small flat blade screwdriver to tighten the terminal block screws. SF 228T Speaker System • Installation...
  • Page 13 “Installing the Speakers” on page 3. Test the system by powering on the amplifier and listening for the correct response from the speakers. Disconnect the power from the amplifier. Proceed to “Completing the Installation” on page SF 228T Speaker System • Installation...

  • Page 14: Direct 8 Ohm Connection To An Amplifier

    Direct 8 Ohm Connection to an Amplifier An amplifer 8 ohm speaker output can be directly connected to the speaker terminal of the SF 228T, (see the diagram below). Red Wire Black Wire From Amplifier Terminal Cover Plate From Amplifier...

  • Page 15: Completing The Installation

    (supplied) Figure 13. 2 Feet x 4 Feet Ceiling Tile Installation Set the speaker in place in the ceiling and position it so the speaker edges are hidden by the existing rails or T-rails. SF 228T Speaker System • Installation...
  • Page 16 For additional support lines repeat as needed. Replace the ceiling tile removed in step 4b. Power on the amplifier, test and make any source device and system adjustments following the amplifier operating instructions. SF 228T Speaker System • Installation...

  • Page 17: Specifications, Dimensions And Packaging

    Specifications, Dimensions and Packaging This section discusses the specifications, part number, and packaging for the SF 228T speakers. Topics that are covered, include: • Specifications • Part Numbers Dimensions • • Packaging Specifications Audio/acoustic and electrical Speaker type ........2-way, full-range, in-ceiling speaker Frequency range ......

  • Page 18: Part Numbers

    (2) SF 228T Speakers (2) Cross bars, (2 feet in length) (2) Cable clamp connectors 10-333-02LF SF 228T Setup Guide Optional Parts and Accessories Part description Part number Terminal cover kit with transformer 881285-RK SF 228T Speaker System • Reference...

  • Page 19: Dimensions

    Dimensions 23.75" 23.75" 5.30" SF 228T SF 228T Speaker System • Reference...

  • Page 20: Packaging

    Packaging SF 228T Setup Guide Top Cap Rail Tube End Cap Ceiling Tile Rails Speakers Protective Sheet Bottom Cap SF 228T Speaker System • Reference...
  • Page 21 Extron Warranty ® Extron Electronics warrants this product against defects in materials and workmanship for a period of three years from the date of purchase. In the event of malfunction during the warranty period attributable directly to faulty workmanship and/or materials, Extron Electronics will, at its option, repair or replace said products or components, to whatever extent it shall deem necessary to restore said product to proper operating condition, provided that it is returned within the warranty period, with proof of purchase and description of malfunction to: USA, Canada, South America,...

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