18 Sound 18TLW3000

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18 Sound 18TLW3000


Key Features

  • 3600 W program power handling
  • 100 mm (4 in) Tetracoil dual voice coil, equivalent to a single coil diameter larger than 152 mm (> 6 in)
  • Ultra linear suspension behavior for excellent sound clarity
  • Symmetric flux density and inductance behaviour
  • Low noise forced air cooling design
  • Water repellent cone and epoxy coated plates for outdoor use
  • Suitable for vented, horn loaded and bandpass subwoofer design

The 18TLW3000 is an 18 inch diameter high performance subwoofer, specifically designed for high SPL subwoofer applications in either a reflex, bandpass or horn loaded configuration. For optimum results we recommend the usage of power amplifiers able to deliver 3600W program power without clipping

18TLW3000 uses Eighteen Sound proprietary Tetracoil technology, where two different, axially separated magnetic gaps and two inside-outside 4" diameter voice coils are  wound on the same former and suspended evenly in the two magnetic gaps.

The Tetracoil design key advantages are:

1) a symmetric flux density versus displacement behavior, that minimizes the even distortion products;

2) a very symmetric and flat inductance curve;

3) the equivalent voice coil diameter of a 4" Tetracoil speaker is greater than 6". Consequently heat dissipation occurs over a larger surface area, driving AES power handling up to 1800 W.

18TLW3000 design features include a large displacement suspension system which, in conjunction with a fiberglass reinforced, straight ribbed cone allows an ultra-linear piston action and provides full mechanical control across the entire working range.

In order to furtherly increase power handling and reduce power compression figure, a low density material air diffractor is placed into the backplate venting hole acting as a cooling system, increasing power handling capability and lowering the power compression figure.

18TLW3000 is able to perform properly under inclement weather conditions: the exclusive cone treatment improves pulp strength and gives water repellent properties to both sides of the membrane. In addition, magnetic structure metal plates coating is far more resistant than standard zinc coating to the corrosive effects of salts and oxidization.

General Specifications

Nominal Diameter460 mm (18 in)
Rated Impedance8 Ohm
AES Power1800 W
Program Power3600 W
Peak Power10000 W
Sensitivity95 dB
Frequency Range30 - 2000 Hz
Power Compression @-10dB0,6 dB
Power Compression @-3dB2,0 dB
Power Compression @Full Power3,4 dB
Max Recomm. Frequency300 Hz
Recomm. Enclosure Volume100 - 350 lt. (3,53 - 12,36 cuft)
Minimum Impedance5,7 Ohm at 25°C
Max Peak To Peak Excursion45 mm (1.77 in)
Voice Coil Diameter100 mm (4 in)
Voice Coil winding materialcopper
SuspensionTriple roll, Polycotton
ConeCurvilinear fiberglass loaded cellulose

Thiele Small Parameters

Fs33 Hz
Re4,6 Ohm
Sd0,1225 sq. mt. (189,88 sq. in.)
Vas185 lt. (6.53 cuft)
Mms266 gr. (0,59 lb)
BL24,5 Tm
Linear Mathematical Xmax± 12 mm (± 0,47 in)
Le (1kHz)1,80 mH
Ref. Efficiency 1W@1m (half space)94,0 dB

Mounting information

Overall diameter462 mm (18,18 in)
N. of mounting holes and bolt8
Mounting holes diameter8,5 mm (0,33 in)
Bolt circle diameter438-440 mm (17,24-17,32 in)
Front mount baffle cutout ø425 mm (16.73 in)
Rear mount baffle cutout ø414 mm (16,30 in)
Total depth275 mm (10,83 in)
Flange and gasket thickness24 mm (0.94 in)
Net weight13,2 kg (29.10 lb)
Shipping weight14,6 kg (32,18 lb)
Packaging Dimensions14,6 kg (32,18 lb)