Tectonic BMR36S12-4B

4Ω B
4Ω S4Ω SE

Full-range

Nominal size2x2.5″ / 50x61 mm
Resonance155 Hz
Q factor0.46
Sensitivity83 dB
Linear excursion± 2 mm
Program Power30 W
Tectonic BMR36S12-4B Full-rangeTectonic BMR36S12-4B Full-range
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 83dB
  • Frequency response 140 - 20000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 155Hz
  • Mechanical quality factor QMS 4.92
  • Electrical quality factor QES 0.53
  • Total quality factor QTS 0.46

Large signal parameters

  • Maximum linear excursion xmax 2mm
  • Maximum excursion before damage xlim 5mm
  • Air volume displaced at xmax VD 3.4cm³
  • Power handling P 15W
  • Program power Pmax 30W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.6Ω
  • Inductance (1kHz) LE 0.07mH
  • VC Diameter 25.4mm
  • Former material TIL

Magnet

  • Force factor Bl 3.8N/A
  • Motor constant Bl/√RE 2N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 47mm
  • Effective area SD 17.1cm²
  • Moving mass MMS 2.2g
  • Moving mass (without air load) MMD 2.2g
  • Material Paper

Suspensions

  • Stiffness KMS 1.85N/mm
  • Compliance CMS 540µm/N
  • Equivalent volume to the compliance VAS 0.224L
  • Mechanical resistance RMS 0.41N·s/m

Dimensions

  • Nominal size 2 x 2.5″
  • 50 x 61mm
  • Overall size 50 x 61mm
  • Overall depth 30mm
  • Volume occupied by the driver 0.03L
SPL & Impedance
Force factor
Stiffness
Tectonic BMR36S12-4B SPL & Impedance
Tectonic BMR36S12-4B Force factor
Tectonic BMR36S12-4B Stiffness
Tectonic BMR36S12-4B Dimensions
PDF fileDatasheet

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