Beyma SM-115N

Woofer

Nominal diameter15″ / 380 mm
Resonance35 Hz
Q factor0.38
Sensitivity95.5 dB
Linear excursion± 7.3 mm
Program Power800 W
Discontinued
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 95.5dB
  • Frequency response 35 - 3000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 35Hz
  • Mechanical quality factor QMS 8.50
  • Electrical quality factor QES 0.40
  • Total quality factor QTS 0.38

Large signal parameters

  • Maximum linear excursion xmax 7.3mm
  • Maximum excursion before damage xlim 15mm
  • Air volume displaced at xmax VD 638cm³
  • Power handling P 400W
  • Program power Pmax 800W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.4Ω
  • Inductance (1kHz) LE 1.2mH
  • VC Diameter 77mm
  • Winding height HVC 17.5mm

Magnet

  • Force factor Bl 17.4N/A
  • Motor constant Bl/√RE 6.88N/√W
  • Air gap height HAG 7mm
  • Material Ferrite

Diaphragm

  • Effective diameter 335mm
  • Effective area SD 880cm²
  • Moving mass MMS 86g
  • Moving mass (without air load) MMD 68.4g

Suspensions

  • Stiffness KMS 4.12N/mm
  • Compliance CMS 243µm/N
  • Equivalent volume to the compliance VAS 267L
  • Mechanical resistance RMS 2.2N·s/m

Dimensions

  • Nominal diameter 15
  • 380mm
  • Volume occupied by the driver (estimated) 2.9L
  • Net weight 6.5kg
Beyma SM-115N Impedance
Beyma SM-115N SPL & Distortion
Beyma SM-115N Dimensions

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