| Model | Control 321CT |
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| Frequency Range (-10dB) | 34 Hz – 18 kHz |
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| Power Rating | IEC Long-Term System Power Rating: 250 W continuous pink noise (1000 W peak), 2 hrs 200 W continuous pink noise (800 W peak), 100 hrs |
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| Transformer Taps | 68W, 34W, 17W, (& 8.5W @ 70V) |
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| Frequency Response (±3 dB) | 47 Hz – 16 kHz |
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| Coverage Angle | 90° conical, constant directivity |
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| Directivity Factor (Q) | 8.7 (1k - 16kHz) |
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| Directivity Index (DI) | 9.4 dB (1k - 16kHz) |
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| Sensitivity | 94 dB (1 kHz - 16 kHz) |
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| Crossover Network | 1.8 kHz, 3rd order (18 dB/oct) high-pass plus conjugate to HF, 2nd order low-pass to LF |
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| Dimensions (H x W x D) | 366 x 366 mm (14.4 x 14.4 in) square baffle x depth from back of baffle of 240 mm (9.5 in) |
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| Maximum SPL (1m) | 118 dB (top 70V/100V tap) |
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| Input Connectors | Screw locking barrier strip for bare wire |
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| Drivers | LF Driver: 300 mm (12 in) HF Driver: compression driver, 25 mm (1 inch) coil |
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| Color | White |
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| Safety Agency | Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70 when installed with UL listed backcan such as JBL MTC-300BB12. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849. |
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| Backcan | formed steel (wood-lined; accessory) |
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| Baffle/Rim | Metal, driver pre-mounted to baffle, ported. |
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