SF 26CT

SF 26CT

1. Provide a two-way closed back ceiling speaker that shall provide an internal transformer.
   1. Two-way closed back ceiling speaker with internal transformer for 8 ohm direct and 70/100 volt operation
      1. Driver Requirements
         1. Shall consist of a 6.5" (165 mm) long-throw, polypropylene cone woofer with moisture resistant coating
         2. Shall consist of a 3/4" (19.1 mm) ferrofluid-cooled PEI dome tweeter that is mounted on a hexagonal tweeter bridge
      2. Performance Requirements
         1. Shall provide a frequency range of 65 Hz to 22 kHz, -10 dB below average SPL, measured on-axis in half space per IEC 60268-5
         2. Shall provide a frequency response of 88 Hz to 22 kHz, +/-3 dB, measured in half space
         3. Shall provide a power handling capacity of 65 watts (rms) continuous pink noise and 130 watts (rms) continuous program
         4. Shall provide a nominal sensitivity of 88 dB SPL (1 W, 1 m) measured in half space
         5. Shall provide a nominal impedance of 8 ohms per speaker
         6. Shall provide a nominal conical coverage angle of 111° (1 kHz to 4 kHz)
      3. Electrical Requirements
         1. Shall support 8 ohm direct or 70/100 volt connection from power amplifiers
         2. Shall provide a six-position, through-the-grille power tap selector
            1. Shall provide selectable rotary switch taps for 70 volt operation, including 64 watts, 32 watts, 16 watts, 8 watts, and 8 ohms direct
            2. Shall provide selectable rotary switch taps for 100 volt operation, including null, 64 watts, 32 watts, 16 watts, and 8 ohms direct
         3. Shall provide speaker tap selector and selection guide on the front of the speaker
         4. Shall provide a full range power limiter with the 8 ohm direct input, protecting the tweeter, woofer, and crossover
         5. Shall support one incoming and one outgoing speaker level signal on one 4-pole, 5 mm captive screw connector
            1. Shall support wiring multiple speakers using parallel or loop-through wiring
            2. Shall support a maximum wire gauge of 12 AWG per connection point for a single wire
            3. Shall support a maximum wire gauge of 16 AWG per connection point for two wires
      4. Speaker Enclosure Requirements
         1. Shall provide a thin-edged rounded bezel surrounding the grille
            1. Shall measure 11.09" (281.7 mm) in diameter from bezel edge to edge
            2. Shall provide a white, paintable magnetically-attached perforated steel grille with black scrim
         2. Shall measure 10.64" (270.3 mm) in diameter
         3. Shall measure 8.0” in height from front of ceiling tile to back of rear enclosure
         4. Shall weigh 9.4 lbs (4.3 kg) per speaker
         5. Shall require 9.3" (236.2 mm) diameter opening in mounting surface for speaker cutout
      5. General Requirements
         1. Shall be sold in pairs
         2. Shall have a separable back can and baffle to support single trade and division of labor applications
         3. Shall include modular V-rail and folding C-ring kits
         4. Shall have a cable/conduit access plate that can be oriented for side or top connections
         5. Shall have a 5-year parts and labor warranty
         6. Shall be compatible with Extron SGK SF26C Square Grille Kit
         7. Shall meet regulatory compliances
            1. Shall meet safety compliances under CE, UL 2043, UL1480, NFPA 90A, and NFPA 70
            2. Shall be UL listed for plenum airspaces and meet UL 2043 for heat and smoke release
            3. Shall meet UL 1480 for commercial and professional audio systems
            4. Shall comply with appropriate requirements for RoHS and WEEE
         8. Shall provide five year parts and labor warranty
   2. Approved device shall be the Extron SF 26CT, part number 60-1310-03; no alternates or equals.