GRS 12SW-4HE 12" 4-ohm subwoofer

The versatile 12SW-4HE 12” high excursion subwoofer from GRS is designed to produce excellent low frequency extension in a variety of designs. Suitable for both sealed and vented enclosures, this driver the ideal replacement or upgrade for your existing subwoofers with worn out or blown drivers. Featuring extensive venting, rubber surround, high temperature voice coil, low Fs, and 12.5 mm of excursion the 12SW-4HE is built for remarkable bass response on a budget.

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Product highlights:

• High excursion and low Fs to produce powerful low frequency output
• 4-layer 2” voice coil on a thick aluminum former to handle up to 250 watts RMS
• Venting under the spider, through the pole piece, and in the magnetic gap for excellent heat dissipation
• Durable reinforced paper cone with rubber surround produces reliable and consistent performance
• Extended frame and bumped back plate allow ample clearance for high excursion

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Product details

GRS 12SW-4HE 12" Paper Cone Rubber Surround High Excursion Subwoofer 4 Ohm

Engineered for extended low frequency response and flexibility, the 12SW-4HE 12” high excursion subwoofer from GRS is an ideal replacement driver for existing subwoofer systems or an excellent choice for new economical designs. Capable of producing powerful bass response in both sealed and vented designs, the 12SW-4HE is suitable as a drop-in replacement for most existing 12” subwoofers. The rigid paper cone is supported by a large diameter spider and rubber surround to keep excursion linear while providing reliable performance. An extended frame and bumped back plate allow ample mechanical clearance to avoid damage when driven to high excursion. With a high temperature 2” voice coil wound on a thick aluminum former the 12SW-4HE can comfortably handle up to 250 watts RMS of power. Extensive venting through the frame, pole piece, and magnetic gap dissipates excess heat to keep power compression to a minimum, even when driven hard for long periods. Capable of incredible low frequency extension, the GRS 12SW-4HE is the perfect driver for true bass on a budget.

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Technical Specifications:

• Article number 12SW-4HE
• Woofer Type High Excursion Subwoofer
• Nominal Diameter 12"
• Power Handling (RMS) 250 Watts
• Power Handling (max) 500 Watts
• Impedance (Z) 4 Ohms
• Sensitivity (SPL at 1m / 2.83V) 84.5 dB
• Frequency Response 20 to 500Hz
• Voice Coil Diameter 2"
• DC Resistance (Re) 3.9Ω
• Voice Coil Inductance (Le) 3.5mH
• Resonant Frequency (Fs) 22 Hz
• Mechanical Q (Qms) 4.08
• Electromagnetic Q (Qes) 0.48
• Total Q (Qts) 0.43
• Diaphragm Mass Inc. Airload (Mms) 237g
• Mechanical Compliance of Suspension (Cms) 0.22mm/N
• Surface Area of Cone (Sd) 507.3cm²
• BL Product (BL) 16.2T·m
• Compliance Equivalent Volume (Vas) 2.84ft³
• Maximum Linear Excursion (Xmax) 12.5 mm
• Cone / Diaphragm Material Paper
• Surround Material Rubber
• Voice Coil Wire Material Copper
• Voice Coil Former Aluminum
• Basket / Frame Material Steel
• Magnet Material Ferrite
• Overall Outside Diameter 12.125"
• Overall Depth 6.3"
• Baffle Cutout Diameter 11"
• Bolt Circle Diameter 11.6
• # Mounting Holes 8
• Sealed Volume 1.2ft³
• Sealed F3 40Hz
• Vented Volume 2.9ft³
• Vented F3 22Hz