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SF228TSpeakerSystem•Reference 11
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 ............................. 50 Hz to 20 kHz, -10 dB, half space
Power capacity ............................... 60 W (rms) continuous pink noise (per IEC 60268-5)
120 W (rms) continuous program
Nominal sensitivity .......................... 89 dB SPL, 1 watt, 1 m, half space
Nominal coverage angle ................. 90° conical coverage
Nominal impedance ....................... 8 ohms per speaker
Crossover frequency ....................... 4.5 kHz
Woofer .......................................... (1) 8" (203 mm) polypropylene cone with moisture resistant coating
Tweeter .......................................... (1) 1" (25 mm) silk dome
Input connectors ............................ (1) 10 mm Euro-style captive screw terminal block, 7 pole (for transformer input)
(1) 10 mm Euro-style captive screw terminal block, 2 pole (for direct 8 ohm input)
Tap settings
70 V input ................................ 32 W, 16 W, 8 W, 4 W, 2 W, null (bypass 8 ohm direct connection)
100 V input .............................. Null, 32 W, 16 W, 8 W, 4 W, 2 W (bypass 8 ohm direct connection)
General
Package ......................................... 2 speakers (1 pair) with 2 feet (61 cm) cross bars
Temperature/humidity .................... Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
Mounting ....................................... Drops into 2 feet x 2 feet (61 cm x 61 cm) or 2 feet x 4 feet (61 cm x 122 cm)
suspended tile ceilings
Enclosure type ................................ Composite, square, with metal grille
Enclosure outer dimensions ............ 5.3" H x 23.75" W x 23.75" L
(13.5 cm H x 60.3 cm W x 60.3 cm L)
Product weight ............................... Single: 18.5 lbs (8.4 kg)
Shipping weight ............................. Pair: 45 lbs (21 kg) with mounting kit