GRS 12SW-4 8" Poly Cone Subwoofer 4 Ohm

The GRS 12SW-4 12" 4 ohm poly cone subwoofer is a true bargain in replacement subwoofers! This economical sub features a beefy large diameter voice coil, durable polypropylene cone, and extended excursion for high-energy bass reproduction.

Resonant frequency fS 29.6 Hz

Electrical Q QES 1.27

Mechanical Q QMS 4.51

Total Q factor QTS 0.98

Suspension equivalent air volume VAS 90 litres

DC resistance RE 3.57 Ω

Voice coil inductance LE 1.1 mH

Maximum linear excursion Xmax ± 8.5 mm

Efficiency η₀ 0.18 %

Efficiency bandwidth product EBP 23

Overall diameter 311.2 mm

Baffle hole diameter 282.6 mm

Mounting depth 146 mm

Frame material Steel

Diaphragm material Polypropylene

Surround material Rubber

Voice coil diameter 50.8 mm

Coil material Copper

Magnet Ferrite

Highlights

Large 2" voice coil and bumped back plate enable high power handling
Butyl rubber surround ensures high excursion and long-term durability
Polypropylene cone for perfect balance of stiffness, mass, and self-damping
Long-throw design for deep, powerful bass
 

Product Details

GRS 12SW-4 12" Poly Cone Subwoofer 4 Ohm

Now you can replace blown or damaged subwoofers with new drivers that equal or outperform the original! GRS 12SW-4 poly cone subwoofer is not only the perfect replacement for tired, worn-out subwoofers in a variety of audio gear, but they are also a great choice for new designs. The handsome polypropylene cone provide durability and good looks, while the large vented magnet assembly and extended voice coil enable long-throw performance and authoritative bass in a variety of enclosures.

The 12" model features a 2" diameter voice coil with big 8.5mm excursion for solid bass performance in compact sealed and vented enclosures. These versatile subs are also rugged enough for use in dipole and automotive infinite baffle applications.

See the below list of recommended enclosure alignments for new design.

Recommended sealed enclosure: Vb = 1.5 ft^3, F3 = 37 Hz, Qtc: 1.6

Recommended vented enclosure: Vb = 2.5 ft^3, Fb = 32 Hz, F3 = 30 Hz

• Specifications for: 12SW-4 12" Poly Cone Subwoofer 4 Ohm
• Woofer SeriesReplacement woofer
• Woofer TypeSub Woofer
• Nominal Diameter12"
• Power Handling (RMS)120 Watts
• Power Handling (max)240 Watts
• Continuous Program Power
• Impedance4 ohms
• Sensitivity88 dB 2.83V/1m
• Frequency Response29 to 800 Hz
• Voice Coil Diameter2"
• Magnet Weight
• DC Resistance (Re)3.57 ohms
• Voice Coil Inductance (Le)1.1 mH
• Resonant Frequency (Fs)29.6 Hz
• Mechanical Q (Qms)4.51
• Electromagnetic Q (Qes)1.27
• Total Q (Qts)0.98
• Diaphragm Mass Inc. Airload (Mms)
• Moving Mass Of Diaphragm (Mmd)
• Mechanical Compliance of Suspension (Cms)
• Surface Area of Cone (Sd)
• Volume of Displacement (Vd)
• BL Product (BL)
• Compliance Equivalent Volume (Vas)3.18 ft.³
• Maximum Linear Excursion (Xmax)8.5 mm
• Driver's Mechanical Losses (Rms)
• Cone / Diaphragm MaterialPoly
• Surround MaterialRubber
• Voice Coil Wire MaterialCopper
• Voice Coil Former
• Dual Voice Coil
• Basket / Frame MaterialSteel
• Magnet MaterialFerrite
• Shielded
• Overall Outside Diameter12.25"
• Overall Depth5.75"
• Baffle Cutout Diameter11.125"
• Bolt Circle Diameter11.75"
• # Mounting Holes8
• Mounting Hole Diameter
• Sealed Volume
• Sealed F3
• Vented Volume
• Vented F3