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28 High Output
Background/Foreground Speaker

Frequency Range (-10 dB)1
: 60 Hz to 16 kHz
Continuous Program:
Power Capacity2
: 175 Watts
: 92 dB SPL, 1W, 1m
Directivity Factor (Q): 7.5
Directivity Index (DI): 8.8
Nominal Impedance: 8 ohms
Crossover Frequency: 2.8 kHz
LF Driver: 200 mm (8 in) Polypropylene cone w/WeatherEdge
HF Driver: 25 mm (1 in) Titanium coated polycarbonate
Enclosure Material: HIPS (High Impact Polystyrene)
Overload Protection: Full-Range power limiting to protect network and transducers
Termination: Spring terminals, accepts banana plug
Environmental: Conforms to Mil Spec 810 for humidity, salt spray,
temperature & UV. IEC 529 IP-34 splashproof rating.
Dimensions (H x W x D): 380 x 280 x 220 mm (15.0 x 11.0 x 8.6 in)
Net Weight (ea): 5.5 kg (12 lb)
Shipping Weight (pr): 11 kg (25 lb)
Included Accessories: Invisiball Assembly
6 mm x 180 mm hex key
Optional Accessories:
MTC-28V: For vertical columnar orientation of up to 3 loudspeakers
MTC-28H: For horizontal splaying of two speakers. Three brackets array
up to six loudspeakers in a 360° array.
MTC-28/25CM: Ceiling-mount adapter.
MTC-23SSG: Stainless Steel Grille for harsh environments. Available in
silver, black (-BK) or white (-WH)
MTC-23WMG: WeatherMax™ Stainless Steel Grille protects against driving
precipitation. Available in black or white (-WH)
MTC-PC2: Input panel cover protects input terminals in outdoor
Half-space (on-wall).
Continuous program power is a conservative expression of the system’s ability to handle normal speech and music
program material and is defined as 3 dB above the Continuous Pink Noise Rating (IEC-shaped pink noise with a 6 dB
crest factor, for 100 hours continuously).
Half-space (on-wall), ave 100 Hz to 10 kHz.
JBL continually engages in research related to product improvement. Changes introduced into existing products without
notice are an expression of that philosophy.

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Carrera 74 No.50-15/50-17 Sector el Diamante. Medellín - Colombia
Teléfono: 448 1651 Fax: 230 1943