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Goldwood GW-S525/4 5-1/4" Poly Cone Woofer 4 Ohm

GoldwoodPart # 290-301
Model: GW-S525/4
These silver polymer cone woofers feature a cosmetic stamped steel frame, vented and bumped back plate, and high-quality rubber surround. The relatively shallow profile, polymer construction, and T/S parameters make them great for sealed, free air, or in wall use.

Key Features

  • Cosmetic frame looks good without countersinking
  • Bumped back plate increases mechanical excursion
  • Poly cone and rubber surround is ideal for harsh environments
  • Vented pole piece improves power handling
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Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm
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Estimated back in stock 10/10/2025
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Overview

Goldwood GW-S525/4 5-1/4" Poly Cone Woofer 4 Ohm

These silver polymer cone woofers feature a cosmetic stamped steel frame, vented and bumped back plate, and high-quality rubber surround. The relatively shallow profile, polymer construction, and T/S parameters make them great for sealed, free air, or in wall use.

Product Details

BrandGoldwood
ModelGW-S525/4
Part Number290-301
UPC643420100495
Unit of MeasureEach
Weight1.6

Product Specifications

Nominal Diameter5-1/2"
Power Handling (RMS)70 Watts
Power Handling (MAX)130 Watts
Impedance
Frequency Response50 to 5,500Hz
Sensitivity86.9dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)72.9Hz
DC Resistance (Re)3.6Ω
Voice Coil Inductance (Le)0.3mH
Mechanical Q (Qms)3.79
Electromagnetic Q (Qes)1.15
Total Q (Qts)0.88
Compliance Equivalent Volume (Vas)0.15ft³
Mechanical Compliance of Suspension (Cms)0.45mm/N
BL Product (BL)3.9T·m
Diaphragm Mass Inc. Airload (Mms)10.5g
Maximum Linear Excursion (Xmax)2mm
Surface Area of Cone (Sd)82.29cm²

Materials of Construction

Cone MaterialPoly
Surround MaterialRubber
Basket / Frame MaterialSteel
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter5.6875"
Baffle Cutout Diameter4.4375"
Depth2.25"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.25ft³
Sealed F374.3Hz
Vented Volume0.5ft³
Vented F354.1Hz

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