GRS 5AS-4

4Ω

Full-range

Nominal diameter	5.25″ / 138 mm
Resonance	76 Hz
Q factor	1.26
Sensitivity	87.4 dB
Linear excursion	± 1.5 mm
Program power	60 W

GRS 5AS-4 Full-range

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
Frequency response 75 - 7000Hz

Thiele & Small parameters

Resonance frequency (free air) fS 76Hz
Mechanical quality factor QMS 5.26
Electrical quality factor QES 1.65
Total quality factor QTS 1.26

Large signal parameters

Maximum linear excursion (one way) xmax 1.5mm
Air volume displaced at xmax VD 14cm³
Power handling P 30W
Program power Pmax 60W

Voice Coil

Nominal impedance Z 4Ω
DC resistance RE 3.7Ω
Inductance (1kHz) LE 0.18mH
VC Diameter 20mm
Former material Aluminum

Magnet

Force factor Bl 2.78N/A
Motor constant Bl/√RE 1.45N/√W
Diameter 70mm
Height 10mm

Diaphragm

Effective diameter 109mm
Effective area SD 94cm²
Moving mass (including air load) MMS 7.2g
Moving mass MMD 6.5g
Material Poly

Suspensions

Stiffness KMS 1.64N/mm
Compliance CMS 610µm/N
Equivalent volume to the compliance VAS 7.65L
Mechanical resistance RMS 0.65N·s/m

Dimensions

Nominal diameter 5.25″
138mm
Overall diameter 138mm
Baffle cutout diameter 122mm
Overall depth 55mm
Flange thickness 3mm
Mounting depth 49mm
Volume occupied by the driver (estimated) 0.23L

GRS 5AS-4 SPL

GRS 5AS-4 Dimensions

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