18 Sound 18ID200 2-Ohm iPal 18 inch Neodymium Subwoofer 3600 Watts
The 18iD200 is an 18 inch neodymium ultra high performance subwoofer. The transducer has been optimized for any subwoofer cabinet designs (even the most compact) and is recommended for being driven by a Class D or iPal (tm*) amplifier able to deliver 3600 Watt program power without clipping on 2ohms loads.
18 Sound engineers have obtained the best possible results with today's available materials in terms of clean and undistorted LF reproduction at a ultra high SPL, with the lowest possible power compression figure.
The 18iD200 design features include a large displacement suspension system specifically designed for matching the composite fiber reinforced, straight ribbed cone.
Thanks to the Double Silicon Spider (DSS) technology, the 18iD200 is able to control the moving mass with high linearity, showing an exceptional stability of mechanical parameter values in the long term. Bl force factor, as well as all other electro-dynamic parameters, are linear within the working range. This, together with the exceptional high excursion behavior, ±18mm linear Xmax - makes the 18iD200 an extremely low distortion, highly dynamic transducer.
The 18iD200 features a state-of-the-art 5,3" inside outside ISV copper voice coil enabling the 18iD to deliver extraordinary transient results. The 18iD200 has been developed after intense FEA and fluidodynamics simulation and testing,focusing on dissipating the heat generated by the powerful voice coil. Special attention was given to the optimization of air flow into the gap without introducing audible noise.
A low density material air diffractor placed into the heatsink acts as a cooling system, increasing the power handling capability and lowering the power compression figure.
Features
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Class D amplifier optimized for maximum power transfer
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Conforms to Powersoft™ iPal® standards
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93 dB SPL 1W / 1m average sensitivity
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135mm (5.3") split winding, four layer ISV copper clad aluminum wire voice coil
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3600 W program power handling
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Double Silicon Spider (DSS) for improved excursion control
Specifications
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Nominal Impedance: 2-Ohm
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Minimum Impedance: 1.9-Ohm
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Nominal Power Handling: 1800W
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Continuous Power Handling: 3600W
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Sensitivity: 93.0dB
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Frequency Range: 29-4000 Hz
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Voice coil Diameter: 135 mm (5.13 in)
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Winding Material: Aluminum
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Winding Depth: 45.0 mm (1.77 in)
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Magnetic Gap Depth: 18.0 mm (0.71 in)
Design
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Surround Shape: Triple Roll
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Magnet Material: Neo
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Spider: Double Silicon Spider
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Woofer Cone Treatment: Reinforced, Water Repellent, Treated Paper
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Recommended Enclosure: 120.0 dm3 (4.24 FT3)
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Recommended Tuning: 33 Hz
Parameters
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Resonance Frequency: 29 Hz
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Re: 1.3 Ohm
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Qes: 0.18
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Qms: 7.0
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Qts: 0.17
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Vas: 136.0 dm3 (4.8 FT3)
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SD: 1225.0 cm2 (189.88 in2)
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No: 2.0%
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Xmax: 18.0 mm
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Xvar: 15.0 mm
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Mms: 444.0 g
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Bl: 24.4 Txm
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Le: 0.93 mH
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EBP: 161 Hz
Mounting and Shipping Info
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Overall Diameter: 462 mm (18.19 in)
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Bolt Circle Diameter: 440 mm (17.32 in)
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Baffle Cutout Diameter: 417.9 mm (16.42 in)
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Depth: 238 mm (9.37 in)
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Flange and Gasket Thickness: 24 mm (0.94 in)
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Net Weight: 18.0 kg (39.68 lb)
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Shipping Weight: 18.6 kg (41.01 lb)
2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.
