Tectonic BMR85R12-4A
8Ω
Full-range
| Nominal diameter | 4″ / 100 mm |
| Resonance | 220 Hz |
| Q factor | 1.20 |
| Sensitivity | 81.5 dB |
| Linear excursion | ± 1.1 mm |
| Program Power | 24 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 81.5dB
- Frequency response 200 - 20000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 220Hz
- Mechanical quality factor QMS 2.50
- Electrical quality factor QES 2.28
- Total quality factor QTS 1.20
Large signal parameters
- Maximum linear excursion (one way) xmax 1.1mm
- Maximum excursion before damage xlim 2mm
- Air volume displaced at xmax VD 2.3cm³
- Power handling P 12W
- Program power Pmax 24W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 4.2Ω
- Inductance (1kHz) LE 0.053mH
- VC Diameter 22.2mm
- Winding material Copper Clad Aluminium
Magnet
- Force factor Bl 2.62N/A
- Motor constant Bl/√RE 1.27N/√W
- Material Neodymium
Diaphragm
- Effective diameter 51mm
- Effective area SD 20.5cm²
- Moving mass MMS 2.67g
- Moving mass (without air load) MMD 2.6g
- Material Paper
Suspensions
- Stiffness KMS 5N/mm
- Compliance CMS 200µm/N
- Equivalent volume to the compliance VAS 0.119L
- Mechanical resistance RMS 1.46N·s/m
Dimensions
- Nominal diameter 4″
- 100mm
- Overall size 32 x 100mm
- Mounting baffle cutout 29 x 90mm
- Overall depth 28mm
- Volume occupied by the driver 0.02L
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Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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