Celestion TSQ1845

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.8dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 8.71
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 15mm
• Maximum excursion before damage xlim 40mm
• Air volume displaced at xmax VD 1701cm³
• Power handling P 1800W
• Program power Pmax 3600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 3.06mH
• VC Diameter 115mm
• Winding height HVC 36mm
• Winding material Round copper
• Former material Glass Fibre

Magnet

• Force factor Bl 33.8N/A
• Motor constant Bl/√RE 15.1N/√W
• Air gap height HAG 12mm
• Material Neodymium

Diaphragm

• Effective diameter 380mm
• Effective area SD 1134cm²
• Moving mass MMS 316g
• Moving mass (without air load) MMD 289g
• Material Glass loaded cellulose, water-resistant

Suspensions

• Stiffness KMS 15.4N/mm
• Compliance CMS 65µm/N
• Equivalent volume to the compliance VAS 119L
• Mechanical resistance RMS 7.99N·s/m
• Surround material Triple roll, cloth sealed

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 460mm
• Baffle cutout diameter 414mm
• Overall depth 235mm
• Flange thickness 17mm
• Mounting depth 218mm
• Volume occupied by the driver (estimated) 7.2L
• Net weight 11.8kg
• Frame material Cast aluminium