Hertz SPL Show SS 15 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 31Hz
• Mechanical quality factor QMS 7.40
• Electrical quality factor QES 0.66
• Total quality factor QTS 0.61

Large signal parameters

• Maximum linear excursion xmax 15.4mm
• Maximum excursion before damage xlim 20.7mm
• Air volume displaced at xmax VD 1282cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.8Ω
• Inductance (1kHz, in series) LE 4mH
• VC Diameter 75mm

Magnet

• Force factor (in series) Bl 20N/A
• Motor constant Bl/√RE 10.2N/√W
• Diameter 180mm
• Height 40mm
• Material Ferrite

Diaphragm

• Effective diameter 323mm
• Effective area SD 833cm²
• Moving mass MMS 361g
• Moving mass (without air load) MMD 344g
• Material Non pressed paper with cotton fibre

Suspensions

• Stiffness KMS 14.3N/mm
• Compliance CMS 70µm/N
• Equivalent volume to the compliance VAS 68.8L
• Mechanical resistance RMS 9.5N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 390mm
• Baffle cutout diameter 353mm
• Overall depth 210mm
• Flange thickness 22mm
• Mounting depth 188mm
• Volume occupied by the driver (estimated) 5.5L
• Net weight 10.1kg