| Frequency Range (-10dB) |
45 Hz to 20 kHz |
| Frequency Response (±3 dB) |
62Hz - 16 kHz |
| Power Rating |
240 W Continuous Program (2 hrs) 120 W (480W peak), Continuous Pink Noise (2 hrs) 90 W (360W peak) Continuous Pink Noise (100 hrs) |
| Maximum Input Voltage |
27.5 V RMS (2 hrs), 55.0 V peak |
| Maximum SPL (1m) |
112 dB ave. Continuous Pink Noise (118 dB peak) |
| Sensitivity |
91 dB, 1W/1m (ave. 100 Hz – 10 kHz) |
| Coverage Angle |
100°H x 100°V |
| Directivity Factor (Q) |
7.3 (averaged 1kHz – 16kHz) |
| Directivity Index (DI) |
8.3dB (averaged 1kHz – 16kHz) |
| Impedance |
8 ohms (THRU setting) |
| Crossover Type |
2nd order low-pass, 1st order high-pass, plus conjugate shaping |
| Transformer Taps |
70V: 60W, 30W, 15W, 7.5W 100V: 60W, 30W, 15W Insertion Loss: <0.94 dB at any tap setting Thru Setting: 8Ω nominal |
| Recommended ProtectiveHigh-Pass |
45 Hz high-pass (24 dB/oct) for 8Ω operation plus 15W and 7.5W taps; 55 Hz for 30W tap; 65 Hz for 60W tap. |
| Drivers |
LF: 200 mm (8 in), woven-fiberglass cone with pure butyl rubber surround with Weather-Edge frame protection, high-temp fiberglass voice coil former, high-temp voice coil wire, optimized cone geometry, linear suspension spider, and FEA optimized motor structure.
HF: 25 mm (1 in) PEI diaphragm, low-viscosity ferro-magnetic fluid, and lightweight Kapton™ voice coil former. |
| Enclosure |
High Impact Polystyrene (HIPS) with 10% glass fill, painted with highly-UV resistant paint on white (-WH) version for maximum UV fade resistance. |
| Grille |
Highly zinc-plated, finished in durable TGIC polyester powdercoating. MTC-28WMG-1 (&-WH) available with WeatherMax™ multi-layer foam and tight-weave mesh vapor barrier backing. |
| Mounting Hardware |
InvisiBall wall-mounting system included. Two 6 mm attachment points (on top and bottom) for optional MTC-28WMG-1 (&-WH) U-bracket. Secondary safety attachment loop point on back panel. |
| Outdoor Capability |
IP-44 per IEC529 (IP-55 when installed with the optional MTC-28WMG-1 WeatherMax™ grille and either MTC-PC2 or MTC-PC3 panel cover.) Exceeds MilSpec 810 for humidity, salt-spray, temperature & UV. Passes MilStd-202F for salt spray and ASTM G85 for acid-air plus salt spray. Optional MTC-28WMG-1 WeatherMax™ grille for breaking up driving rain and for especially difficult environments. |
| Input Connectors |
Screw-down terminal strip, zinc-plated copper based, nickel-plated metal screws and washers. Accepts up to 9 mm outside 4 mm inside open lugs (#6, #8, or #10 lug), plus bare wire (up to 12 AWG / 2.5 mm2). Optional MTC-PC2 and MTC-PC3 protective panel covers available to provide sealed entrance for additional weather protection. |
| Safety Agency |
ROHS-compliant; Transformer UL Recognized per UL1876 |
| Colors |
Black (RAL9004) or white (-WH, RAL9016) |
| Dimensions (H x W x D) |
386 x 282 x 219 mm (15.2 x 11.1 x 8.6 in); 277 mm (10.9 in) deep total when mounted on InvisiBall wall-mount bracket. |
| Net Weight (each) |
6.8 kg (15.0 lbs) |
| Shipping Weight |
15.4 kg (34 lbs) pair-packed (for 2 speakers) |
| Included Accessories |
InvisiBall™ wall-mounting system), 6 mm x 180 mm hex key |
| Optional Accessories |
MTC-28UB-1 – Yolk-type U-bracket (&-WH) MTC-28WMG-1 – WeatherMax grille with backing (&-WH) MTC-28/25CM – Ceiling-Mount InvisiBall adapter (&-WH) |
更新: 2024年7月
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