Extron electronic SF 228T manual Specifications Dimensions 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	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

SF 228T Speaker System • Reference 11