GRS | Mid-bass driver

GRS 4SMP-8 Bass-midwoofer

Name: GRS 4SMP-8 mélysugárzó 4" | HQ AudioParts
Brand: GRS
SKU: 4SMP-8
Price: 7490.00 HUF
Availability: LimitedAvailability

SKU: 4SMP-8

101.6 mm 8 Ω

Achieve clear, detailed bass and midrange response in compact speaker designs with this 4-inch polypropylene-cone driver. Its rubber surround and steel frame ensure controlled, reliable performance. The total Q factor of 0.65 suits sealed or small vented enclosures.

7 490 Ft

(5 898 Ft + VAT)

Own warehouse 2 pcs Jul 31.

Külső raktár 2. Out of stock

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Technical data

Nominal diameter	101.6 mm
Impedance	8 Ω
Resonance frequency (Fs)	63 Hz
Sensitivity (SPL at 1 m / 2.83 V)	84.4 dB
Maximum linear deflection (Xmax)	4 mm

Total Q (Qts)	0.65
Electromagnetic Q (Qes)	0.83
Mechanical Q (Qms)	3
DC resistance (Re)	5.5 Ω
Voice coil inductance (L_e)	0.58 mH
BL product (BL)	4.2 T·m
The surface area of the cone (Sd)	54 cm²
Equivalent volume (Iron)	4 l
Mechanical compliance of the suspension (Cms)	0.97 mm/N
Volume of displacement (Vd)	210 cm³
Woofer type	VMV D1se MQA Hi-End Audio DAC with Bluetooth 5.0 AptX
Membrane material	Polypropylene
Surround material	Rubber
Voice coil diameter	26 mm
Voice coil carrier	Aluminum
Magnetic material	Ferrite
Basket / frame material	Steel
# Mounting holes	4

The GRS 4SMP-8 Bass-midwoofer is a compact yet powerful driver designed to deliver articulate bass and clear midrange response in space-constrained audio projects. This 4-inch unit excels in applications such as bookshelf speakers, small subwoofer systems, or as a dedicated mid-bass driver in multi-way designs, where its balanced performance brings depth and detail to music and home theatre setups.

Engineered for precision, the 4SMP-8 features a polypropylene cone that offers low mass and high internal damping, ensuring natural sound reproduction with minimal coloration. The rubber surround provides long-lasting compliance and controlled excursion, while the steel basket adds rigidity to reduce unwanted resonances. With a total Q factor (Qts) of 0.65 and a sensitivity of 84.4 dB SPL at 2.83V, this driver is well-suited for sealed or ported enclosures, offering a maximum linear excursion (Xmax) of 4 mm for solid low-frequency output.

The ferrite magnet motor system and a voice coil inductance of 0.58 mH contribute to efficient power handling and transient accuracy. Whether you are upgrading an existing design or building from scratch, the GRS 4SMP-8 provides reliable, detailed performance in a compact footprint, making it a versatile choice for discerning audio enthusiasts.