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NEW GRS 8" Woofer Surface Mount Poly Cone 4 Ohm 8SMP-4

GRSPart # 292-866
Model: 8SMP-4
The GRS 8SMP-4 is a versatile 8" 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 8SMP-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

  • Damped poly cone with rubber surround controls resonance for a smooth natural response
  • Copper cap in the motor lowers inductance and distortion for more accurate response
  • Low profile frame supports surface mounting for easy installation
  • Vented pole piece and aluminum voice coil former improve cooling to limit compression
  • Flexible enough for use in sealed or vented enclosures, great choice for 3-way designs
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Overview

GRS 8" Woofer Surface Mount Poly Cone 4 Ohm 8SMP-4

The GRS 8SMP-4 is an 8" 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 8SMP-4 delivers good efficiency for high output without requiring a ton of power.

The 8SMP-4 is an excellent choice for both sealed and vented enclosures, making it a versatile addition to 3-way speaker designs. Furthermore, its compatibility with many classic speaker systems opens the door to exciting possibilities for rejuvenating your existing audio setup. This driver not only breathes new life into your sound system but also provides a practical solution for enhancing your overall listening experience.

Product Details

BrandGRS
Model8SMP-4
Part Number292-866
UPC848864079844
Unit of MeasureEach
Weight7

Product Specifications

Nominal Diameter8"
Bolt Circle Diameter8.125
Power Handling (RMS)60 Watts
Power Handling (MAX)120 Watts
Impedance4Ω
Frequency Response30 - 1,500Hz
Sensitivity91.7dB 2.83V/1m
Voice Coil Diameter1.5"

Thiele-Small Parameters

Resonant Frequency (Fs)38Hz
DC Resistance (Re)3.8Ω
Voice Coil Inductance (Le)0.3mH
Mechanical Q (Qms)2.69
Electromagnetic Q (Qes)0.46
Total Q (Qts)0.39
Compliance Equivalent Volume (Vas)1.33ft³
Mechanical Compliance of Suspension (Cms)0.61mm/N
BL Product (BL)7.6T·m
Diaphragm Mass Inc. Airload (Mms)29g
Maximum Linear Excursion (Xmax)5.5mm
Surface Area of Cone (Sd)211cm²

Materials of Construction

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

Mounting Information

Overall Outside Diameter8.5"
Baffle Cutout Diameter7"
Depth3.5"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.4ft³
Sealed F382Hz
Vented Volume1ft³
Vented F344Hz

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