Hertz SPL Show SS 12 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 36Hz
• Mechanical quality factor QMS 7.00
• Electrical quality factor QES 0.70
• Total quality factor QTS 0.64

Large signal parameters

• Maximum linear excursion xmax 15.4mm
• Maximum excursion before damage xlim 20.7mm
• Air volume displaced at xmax VD 765cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.8Ω
• Inductance (1kHz, in series) LE 3.6mH
• VC Diameter 75mm

Magnet

• Force factor (in series) Bl 18.7N/A
• Motor constant Bl/√RE 9.56N/√W
• Diameter 170mm
• Height 40mm
• Material Ferrite

Diaphragm

• Effective diameter 253mm
• Effective area SD 497cm²
• Moving mass MMS 283g
• Moving mass (without air load) MMD 275g
• Material Non pressed paper with cotton fibre

Suspensions

• Stiffness KMS 14.3N/mm
• Compliance CMS 70µm/N
• Equivalent volume to the compliance VAS 24.5L
• Mechanical resistance RMS 9.14N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 320mm
• Baffle cutout diameter 283mm
• Overall depth 184mm
• Flange thickness 23mm
• Mounting depth 161mm
• Volume occupied by the driver (estimated) 4.1L
• Net weight 8.8kg