Tectonic BMR36S12-4SE

4Ω SE

Full-range

Nominal size	2x2.5″ / 54x63 mm
Resonance	146 Hz
Q factor	0.73
Sensitivity	81 dB
Linear excursion	± 2 mm
Program Power	30 W

Tectonic BMR36S12-4SE Full-range

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 81dB
Frequency response 140 - 20000Hz

Thiele & Small parameters

Resonance frequency (free air) fS 146Hz
Mechanical quality factor QMS 5.14
Electrical quality factor QES 0.85
Total quality factor QTS 0.73

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 3.8Ω
Inductance (1kHz) LE 0.08mH
VC Diameter 25.4mm
Former material TIL

Magnet

Force factor Bl 3.02N/A
Motor constant Bl/√RE 1.56N/√W
Material Neodymium

Diaphragm

Effective diameter 47mm
Effective area SD 17.1cm²
Moving mass MMS 2.24g
Moving mass (without air load) MMD 2.2g
Material Paper

Suspensions

Stiffness KMS 1.89N/mm
Compliance CMS 530µm/N
Equivalent volume to the compliance VAS 0.22L
Mechanical resistance RMS 0.4N·s/m

Dimensions

Nominal size 2 x 2.5″
54 x 63mm
Overall size 54 x 63mm
Overall depth 30mm

Tectonic BMR36S12-4SE Dimensions

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