Eighteen Sound 21LW2600

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.4dB
• Frequency response 35 - 1400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 27Hz
• Mechanical quality factor QMS 23.10
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 14.6mm
• Air volume displaced at xmax VD 2424cm³
• Power handling P 1600W
• Program power Pmax 3200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 2.67mH
• VC Diameter 100mm

Magnet

• Force factor Bl 32.5N/A
• Motor constant Bl/√RE 14.3N/√W
• Material Ferrite

Diaphragm

• Effective diameter 460mm
• Effective area SD 1660cm²
• Moving mass MMS 398g
• Moving mass (without air load) MMD 351g
• Material Weather protected

Suspensions

• Stiffness KMS 11.5N/mm
• Compliance CMS 87µm/N
• Equivalent volume to the compliance VAS 333L
• Mechanical resistance RMS 2.92N·s/m

Dimensions

• Nominal diameter 21″
• 533mm
• Overall diameter 545mm
• Baffle cutout diameter 492mm
• Overall depth 245mm
• Flange thickness 18mm
• Mounting depth 227mm
• Volume occupied by the driver (estimated) 11L
• Net weight 17.1kg