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Transducer LF neodim 21iD

18 Sound
cod produs: 21iD
In Stoc
5038.29 Lei 3778.72 Lei
*pretul include TVA

Descrierea Produsului

Key Features

  • Class D amplifier optimized for maximum power transfer
  • Conforms to Powersoft™ iPal® standards
  • 94.2 dB SPL 1W / 1m average sensitivity
  • 135mm (5.3") split winding, four layer ISV aluminum voice coil
  • 3600 W program power handling
  • Triple Silicon Spider (TSS) for improved excursion control
  • Aluminum demodulating ring (SDR) for lower distortion


The 21iD is an 21 inch neodymium high performance subwoofer. The loudspeaker has been optimized for vented and bandpass subwoofer cabinet designs and is recommended to use a Class D or iPal (tm*) amplifier able to deliver 3600 Watt program power without clipping. Eighteen 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 transducer design features include a large displacement suspension system specifically designed for matching the composite fiber reinforced, straight ribbed cone. Thanks to the Triple Silicon Spider (TSS) technology, the 21iD 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 - 70mm before damage, ±14mm linear Xmax - makes the 21iD an extremely low distortion, highly dynamic transducer. The 21iD features a state-of-the-art 5,3" inside outside ISV (Interleaved Sandwich Voice-Coil) enabling the 21iD to deliver extraordinary transient results. The 21iD 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.

General Specifications

Nominal Diameter 533 mm (21 in)
Rated Impedance 2 Ohm
AES Power 1800 W
Program Power 3600 W
Peak Power 10000 W
Sensitivity 94,2 dB
Frequency Range 29 ÷ 1600 Hz
Power Compression @-10dB 180W 0,7 dB
Power Compression @-3dB 900W 1,3 dB
Power Compression @Full Power 1800W 2,2 dB
Max Recomm. Frequency 150 Hz
Recomm. Enclosure Volume 120 ÷ 250 lt. (4,24 ÷ 8,83 cu.ft)
Minimum Impedance 2 Ohm
Max Peak To Peak Excursion 70 mm (2,76 in)
Voice Coil Diameter 135 mm (5,31 in)
Voice Coil winding material
Suspension Triple Roll, Polycotton
Cone Straight ribbed carbon fiber loaded cellulose

Thiele Small Parameters

Fs 38 Hz
Re 1,3 Ohm
Sd 0,166 sq.m (257,30
Qms 5,60
Qes 0,24
Qts 0,23
Vas 143 lt. (5,05 cu.ft)
Mms 489 gr. (1,08 lb)
BL 25,20 Tm
Linear Mathematical Xmax ±14 mm (±0,55 in)
Le (1kHz) 1,08 mH

Mounting information

Overall diameter 545 mm (21,46 in)
N. of mounting holes and bolt 8
Mounting holes diameter 8,5 mm (0,33 in)
Bolt circle diameter 520 mm (20,47 in)
Front mount baffle cutout ø 492 mm (19,37 in)
Rear mount baffle cutout ø 490 mm (19,29 in)
Total depth 250 mm (9,84 in)
Flange and gasket thickness 18 mm (0,71 in)
Net weight 13,6 kg (29,98 lb)
Shipping weight 15,1 kg (33,29 lb)
CardBoard Packaging dimensions 570x570x290 mm (22,44x22,44x11,42 in)


21iD 022212N000 2 Ohm

Specificatiile Produsului

  • Dimensiune Difuzor 21"
  • Echipamente Sunet Difuzoare
  • Impedanta 2 ohm
  • Putere RMS > 1000 w
  • Tehnologie Neodimium
  • Tip difuzor LF Bass - Joase


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