GRS 6SMP-4

4Ω

Woofer

Nominal diameter	6.5″ / 174 mm
Resonance	45 Hz
Q factor	0.39
Sensitivity	86.7 dB
Linear excursion	± 5 mm
Program power	100 W

GRS 6SMP-4 Woofer

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 86.7dB
Frequency response 40 - 2500Hz

Thiele & Small parameters

Resonance frequency (free air) fS 45Hz
Mechanical quality factor QMS 2.73
Electrical quality factor QES 0.45
Total quality factor QTS 0.39

Large signal parameters

Maximum linear excursion (one way) xmax 5mm
Air volume displaced at xmax VD 68cm³
Power handling P 50W
Program power Pmax 100W

Voice Coil

Nominal impedance Z 4Ω
DC resistance RE 3.7Ω
Inductance (1kHz) LE 0.29mH
VC Diameter 39mm
Former material Aluminum

Magnet

Force factor Bl 7N/A
Motor constant Bl/√RE 3.64N/√W
Diameter 120mm
Height 22mm

Diaphragm

Effective diameter 132mm
Effective area SD 136cm²
Moving mass (including air load) MMS 21g
Moving mass MMD 19.8g
Material Damped poly cone

Suspensions

Stiffness KMS 1.67N/mm
Compliance CMS 600µm/N
Equivalent volume to the compliance VAS 15L
Mechanical resistance RMS 2.17N·s/m
Surround material Rubber

Dimensions

Nominal diameter 6.5″
174mm
Overall diameter 174mm
Baffle cutout diameter 148mm
Overall depth 84mm
Flange thickness 6mm
Mounting depth 77mm
Volume occupied by the driver (estimated) 0.54L

GRS 6SMP-4 SPL

GRS 6SMP-4 Dimensions

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fS	47 Hz
SD	136 cm²
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