GRS 8FR-8 Full-Range 8" Speaker Pioneer Type B20FU20-51FW

GRS | Full-range driver

GRS 8FR-8 Full-Range 8" Speaker Pioneer Type B20FU20-51FW

Name: GRS 8FR-8 mélysugárzó 8" | HQ AudioParts
Brand: GRS
SKU: 8FR-8
Price: 7790.00 HUF
Availability: InStock

SKU: 8FR-8

203.2 mm 8 Ω

Achieve full-range sound in a compact design with this 8-inch broadband driver, ideal for DIY audio projects and replacement speakers. It features a paper cone and ferrite magnet for natural tonal balance. Technical specification: sensitivity of 89.7 dB SPL at 1 metre with 2.83V input.

7 790 Ft

(6 134 Ft + VAT)

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Külső raktár 2. 10+ pcs Aug 5.

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Technical data

Nominal diameter	203.2 mm
Impedance	8 Ω
Sensitivity (SPL at 1 m / 2.83 V)	89.7 dB
Power tolerance (max)	85 W
Resonance frequency (Fs)	45.1 Hz

Maximum linear deflection (Xmax)	3 mm
Total Q (Qts)	0.56
Electromagnetic Q (Qes)	0.63
Mechanical Q (Qms)	4.83
DC resistance (Re)	7.3 Ω
Voice coil inductance (L_e)	1.19 mH
BL product (BL)	8.52 T·m
The surface area of the cone (Sd)	215 cm²
Equivalent volume (Iron)	36.99 l
Moving mass with air load (Mms)	22.16 g
Mechanical compliance of the suspension (Cms)	0.56 mm/N
Volume of displacement (Vd)	15 cm³
Woofer type	DS2 Audio DAC
Membrane material	Paper
Voice coil diameter	38 mm
Magnetic material	Ferrite
Dimensions (mm)	203.2 mm
# Mounting holes	4

The GRS 8FR-8 Full-Range 8" Speaker, modelled on the classic Pioneer B20FU20-51FW, delivers impressively natural and balanced sound from a single driver. As a full-range driver, it eliminates the need for a separate tweeter in many applications, making it an excellent choice for DIY audio enthusiasts, vintage radio restorers, or anyone seeking a straightforward upgrade for existing loudspeaker systems. Its full-range capability also suits compact public address cabinets and guitar amplifier builds where simplicity and tonal clarity are paramount.

Technically, this 8-inch driver features a paper cone and a ferrite magnet, which together produce a warm, articulate midrange with a sensitivity of 89.7 dB (1m/2.83V). The impedance is 8 ohms, with a DC resistance of 7.3 ohms. Key parameters include a total Q (Qts) of 0.56, a mechanical Q (Qms) of 4.83, and an electrical Q (Qes) of 0.63, indicating a well-damped response suitable for both open-baffle and sealed enclosures. The voice coil inductance (Le) is 1.19 mH, and the maximum linear excursion (Xmax) is 3 mm, with a displacement volume (Vd) of 15. Four mounting holes ensure secure installation. With its 203.2 mm nominal diameter and robust construction, this driver offers a versatile, high-value solution for achieving full-range sound in a compact footprint.