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NEW GRS 12" Woofer Surface Mount Poly Cone 4 Ohm 12SMP-4

GRSPart # 292-874
Model: 12SMP-4

The GRS 12SMP-4 is a versatile 12" 4 ohm woofer designed for easy surface mounting and exceptional reliability. It features a damped poly cone and a rubber surround, which work together to produce natural and well-controlled sound output. Additionally, it includes a copper cap that minimizes inductance and distortion. The vented pole piece and aluminum voice-coil former enhance cooling, effectively reducing power compression. With its lightweight 2-layer coil, the 12SMP-4 is ideally suited for sealed enclosures and larger 3-way speaker systems making it an excellent choice for anyone looking to upgrade their older home audio setups.

Key Features

  • Copper cap in the motor lowers inductance and distortion for more accurate response
  • Low profile frame supports surface mounting for easy installation
  • Damped poly cone with rubber surround controls resonance for a smooth natural response
  • Vented pole piece and aluminum voice coil former improve cooling to limit compression
  • Excellent performance in sealed boxes, great choice for larger 3-way designs
Similar items that may interest you:
GRS 12" Woofer Surface Mount Poly Cone 8 Ohm 12SMP-8
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Overview

GRS 12" Woofer Surface Mount Poly Cone 4 Ohm 12SMP-4

The GRS 12SMP-4 is a 12" woofer with a low profile frame designed for easy surface mounting, making it a great choice for new installations or retrofits in older speaker systems. Its design focuses on accurate response and long-term reliability, ensuring that you can enjoy consistent performance for years to come.

Crafted with a damped poly cone and rubber surround, this woofer provides a natural and well-controlled response. The inclusion of a copper cap in the motor helps to reduce inductance and distortion, allowing for clearer and more accurate reproduction. Additionally, an integrated foam gasket ensures an airtight seal within the cabinet. The vented pole piece and aluminum former work together to keep the voice coil cool, minimizing power compression and maintaining sound integrity even at higher volumes. Thanks to a lightweight 2-layer coil the 12SMP-4 delivers good efficiency for high output without requiring a ton of power.

Optimized for use in sealed enclosures, the 12SMP-4 is particularly well-suited for larger 3-way speaker designs. In addition, this driver is compatible with many classic speaker systems making it a practical solution for revitalizing or even enhancing your audio setup.

Product Details

BrandGRS
Model12SMP-4
Part Number292-874
UPC848864079882
Unit of MeasureEach
Weight13

Product Specifications

Nominal Diameter12"
Bolt Circle Diameter12.5
Power Handling (RMS)90 Watts
Power Handling (MAX)180 Watts
Impedance4Ω
Frequency Response20 - 1,500Hz
Sensitivity91.9dB 2.83V/1m
Voice Coil Diameter2"

Thiele-Small Parameters

Resonant Frequency (Fs)28Hz
DC Resistance (Re)3.9Ω
Voice Coil Inductance (Le)0.41mH
Mechanical Q (Qms)3.1
Electromagnetic Q (Qes)0.61
Total Q (Qts)0.51
Compliance Equivalent Volume (Vas)4.7ft³
Mechanical Compliance of Suspension (Cms)0.35mm/N
BL Product (BL)10.2T·m
Diaphragm Mass Inc. Airload (Mms)93g
Maximum Linear Excursion (Xmax)5.5mm
Surface Area of Cone (Sd)516cm²

Materials of Construction

Cone MaterialPoly
Surround MaterialRubber
Voice Coil FormerAluminum
Basket / Frame MaterialSteel
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter13"
Baffle Cutout Diameter11.2"
Depth5"
# Mounting Holes6

Parts Express Staff Recommended Enclosure Volume

Sealed Volume2.4ft³
Sealed F347Hz
Vented Volume4ft³
Vented F329Hz

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