GRS 4PF-8 4" Paper Cone Foam Surround Woofer

GRS | Bass mid-bass subwoofer

GRS 4PF-8 4" Paper Cone Foam Surround Woofer

Name: GRS 4PF-8 mélysugárzó 4" | HQ AudioParts
Brand: GRS
SKU: 4PF-8
Price: 5190.00 HUF
Availability: InStock

SKU: 4PF-8

101.6 mm 8 Ω

Achieve clear mid-bass response in compact enclosures with this 4-inch paper cone woofer featuring a foam surround for controlled excursion. Its 8-ohm impedance suits a range of amplifier configurations, with a total Q factor of 1.94 for sealed box applications.

5 190 Ft

(4 087 Ft + VAT)

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Technical data

Nominal diameter	101.6 mm
Impedance	8 Ω
Resonance frequency (Fs)	137 Hz
Sensitivity (SPL at 1 m / 2.83 V)	83 dB
Power tolerance (max)	70 W

Maximum linear deflection (Xmax)	1.5 mm
Total Q (Qts)	1.94
Mechanical Q (Qms)	5.81
DC resistance (Re)	6.8 Ω
Voice coil inductance (L_e)	0.5 mH
BL product (BL)	3.1 T·m
The surface area of the cone (Sd)	55.2 cm²
Mechanical compliance of the suspension (Cms)	0.28 mm/N
Volume of displacement (Vd)	23 cm³
Woofer type	DL200 Audio DAC
Membrane material	Paper
Voice coil diameter	25 mm
Dimensions (mm)	114 mm
Screw head diameter	105 mm
Diameter of the baffle cutout	94 mm
Depth	54 mm

The GRS 4PF-8 is a meticulously engineered 4-inch paper cone woofer designed to deliver articulate mid-bass performance in space-conscious designs. Its foam surround ensures controlled excursion, making it an ideal choice for compact loudspeaker systems, automotive audio upgrades, or DIY projects where precise low-frequency reproduction is required without sacrificing cabinet volume. This driver excels in sealed or small ported enclosures, providing a balanced foundation for two-way designs or as a dedicated mid-bass unit in multi-driver arrays.

Technical features include a paper cone membrane that offers natural damping and a smooth frequency response, complemented by a 1.5mm Xmax for linear excursion. The 8-ohm impedance and 6.8-ohm DC resistance ensure compatibility with a wide range of amplifiers, while a sensitivity of 83dB SPL (1m/2.83V) allows for efficient power handling. With a total Q (Qts) of 1.94 and a mechanical Q (Qms) of 5.81, this woofer is optimised for controlled bass in smaller volumes. The 94mm cutout diameter and 105mm screw circle facilitate straightforward installation, and the 54mm mounting depth suits shallow enclosures. Whether for hi-fi speakers or custom automotive builds, the 4PF-8 delivers reliable, clear mid-bass with minimal distortion.