2216 2218 2218 PDF Product Sheet Available Click Here!

18” EXTENDED LOW FREQUENCY LOUDSPEAKER

The Radian 2218 18” low frequency transducer produces extremely high levels of bass energy. This woofer is designed as an extended low frequency device, used as a subwoofer or general purpose LF transducer. Notably this transducer will perform very well in a 4.5 cubic foot enclosure.       Integral to this design is a composite ribbed cone, reinforced with Kevlar®. The voice coil is edge wound aluminum for better transient response, however our advanced adhesives give it the power handling capacity of more conventional copper voice coils. With 600 watts RMS power handling and a high-energy magnetic structure with a venturi cross section to increase ventilation efficiency, the output sensitivity is 96 dB (one watt, one meter) with a continuous sound pressure level of 123 dB. Low Distortion 4" Voice Coil Kevlar® Impregnated Cone Venturi-Vented Cooling 600 Watts RMS 26 Hz Low Frequency Cutoff Cast Aluminum Frame High Sensitivity

Specifications FREQUENCY RESPONSE 26 Hz – 100 Hz MAXIMUM POWER HANDLING* 600 watts RMS SENSITIVITY** 95 dB RECOMMENDED CROSSOVER 80 - 120 Hz NOMINAL IMPEDANCE 8 ohms VOICE COIL DIAMETER 4.0" (101.6mm) RECOMMENDED ENCLOSURE 6 ft³ - 12 ft³ (170 - 340 liters) WOOFER CONE MATERIAL Kevlar® Reinforced Paper VOICE COIL MATERIAL Edgewood Aluminum BASKET MATERIAL Cast Aluminum OVERALL DIAMETER 18.31" (465mm) MOUNTING BOLT CIRCLE 17.38" (441.33mm) CUT-OUT DIAMETER 16.88" (429mm) OVERALL DEPTH 7.59" (192.78mm) INPUT CONNECTORS Pushbutton Terminals WEIGHT 26 lbs. (11.8 kg) THIELE/SMALL PARAMETERS:        QTS 0.522      QMS 3.1591      QES 0.6254      VAS (FT³) 10 (286 liters)      FS (Hz) 33.8      XMAX (IN) 0.187      RE () 6.3      SD (IN²) 201 (0.130m²)      *EIA Standard RS-426A      **One watt at one meter (averaged 100 Hz - 800 Hz) Amplitude vs. Frequency Response of the Radian 2216 as measured on axis with a one watt (2.83 Vrms), swept sine wave input at 8 ohms, in a 4.5 (ft³) vented enclosure tuned to 46 Hz. Specifications subject ot change without notice.

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