| 1″ (25mm) Ceramic dome, Ferrofluid-cooled in an acoustic back chamber | Two 1″ (25mm) Ceramic domes, Ferrofluid-cooled |
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| 5 1/4″ (133mm) Carbon fiber/Rohacell laminated cone with a rubber surround | Two 3″ (76mm) Carbon fiber/Rohacell laminated cones with rubber surrounds |
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| Two 5 1/4″ (133mm) Carbon fiber/Rohacell laminated cones with rubber surrounds | Two 5 1/4″ (133mm) Carbon fiber/Rohacell laminated cones with rubber surrounds |
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| 8 ohms nominal; 6 ohms minimum | 8 ohms nominal; 6 ohms minimum |
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| 5 watts minimum; 150 watts maximum | 5 watts minimum; 150 watts maximum |
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| 12 3/8″ (314 mm) x 12 3/8″ (314 mm) | 12 3/8″ (314 mm) x 12 3/8″ (314 mm) |