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Dayton Audio SIG225-4 8" Signature Series Woofer 100W Driver 4 Ohm

Dayton Audio
Part #295-656

Dayton Audio SIG225-4 8" Signature Series Woofer 100W Driver 4 Ohm

Dayton Audio
Part #295-656  
Model: SIG225-4

The Dayton Audio Signature Series was designed to give speaker designers access to the pinnacle of speaker technology at the value expected from Dayton Audio. Featuring an open aluminum cast frame, anodized aluminum cone and a polyimide former, these drivers can provide extended range with incredibly low distortion. After hours of painstaking engineering and testing with meticulous attention to detail, we at Dayton Audio deem this driver line worthy of the endorsement of even the most critical audiophile.

Key Features
  • Extensive Klippel LPM and LSI testing to optimize Bl symmetry and parameters
  • Indexed cone/surround junction for smooth transition/frequency response
  • Polyimide formers for improved mechanical damping smooth frequency response
  • One piece concave black anodized aluminum cone
  • Vented former and elevated spider for improved air flow
  • Open aluminum cast frame for improved heat dissipation
  • Countersunk stainless steel magnet badging for long time aesthetics
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Overview

Dayton Audio SIG225-4 8" Signature Series Woofer 100W Driver 4 Ohm

Dayton Audio SIG225-4 8” Signature Series Extended Range 100W Driver 4 Ohm

The Dayton Audio Signature Series was designed to give speaker designers access to the pinnacle of speaker technology at the value expected from Dayton Audio. Featuring an open aluminum cast frame, anodized aluminum cone and a polyimide former, these drivers can provide extended range with incredibly low distortion.

Key Specs:

  • Nominal Diameter: 8"
  • Power Handling (RMS): 100
  • Power Handling (MAX): 200
  • Impedance: 4Ω
  • Frequency Response: 40Hz-3000Hz
  • Sensitivity: 91.2dB @ 2.83V/1m
  • Voice Coil Diameter: 2"
  • Maximum Linear Excursion: 6mm

Signature Sound and Performance

The smooth and extended frequency response of these Dayton Audio speaker drivers ensures that its entire audible spectrum is accurately reproduced, from the lowest bass notes to the highest treble frequencies. This well-balanced frequency response delivers a natural and immersive listening experience, allowing you to hear every detail and nuance in your favorite music or movies.

Meticulous Attention to Detail

The speaker drivers' design, materials, and meticulous engineering work in harmony to minimize distortion, ensuring that the sound remains clean and clear even at high volumes. By achieving low distortion, these speaker drivers provide an accurate representation of the original audio signal, allowing audiophiles to enjoy a true-to-life listening experience with exceptional clarity and precision. The Signature Series speaker drivers used rigorous Klippel testing throughout the design process, a state-of-the-art analysis method to provide optimal performance, consistency, and reliability by precisely measuring and optimizing the drivers' magnetic and mechanical properties.

Indexed Cone and Surround Junction

Diffraction caused by the abrupt edge of the surround is minimized by the use of an indexed junction. This design feature helps create a smooth transition between the cone and surround, resulting in improved frequency response while improving the rigidity of the cone further resulting in less cone distortion at high excursion.

Vented Polyimide Former with CCA Voice Coil Wire and Elevated Spider Suspension

The polyimide voice coil formers provide excellent mechanical damping and a smoother frequency response, and the copper-clad aluminum (CCA) wire reduces moving mass further enhancing the overall sound quality and increasing the efficiency of the speaker driver. An elevated spider and vented former increases airflow to the coils to keep the assembly running cool during long periods of use.

Concave Black Anodized Aluminum Cone

The aluminum construction of the cone is lightweight, rigid, and helps reduce distortion, contributing to a more accurate sound reproduction. The anodization process is optimized to contribute to the dampening of the cone and provides high aesthetic value to any speaker design.

Open Aluminum Cast Frame and Stainless-Steel Badging

The aluminum cast frame keeps movement isolated to the diaphragm, increasing low frequency performance and providing additional thermal dissipation. Stainless-steel badging completes the sleek aesthetic of the Signature Series drivers providing a timeless visual appeal for every speaker designer.

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Product Details

BrandDayton Audio
ModelSIG225-4
Part Number295-656
UPC848791009525
Unit of MeasureEach
Weight6.3

Product Specifications

Nominal Diameter8"
Bolt Circle Diameter8.31
Power Handling (RMS)100 Watts
Power Handling (MAX)200 Watts
Impedance4Ω
Frequency Response40 - 3000Hz
Sensitivity91.2dB 2.83V/1m
Voice Coil Diameter2"

Thiele-Small Parameters

Resonant Frequency (Fs)40Hz
DC Resistance (Re)3.9Ω
Voice Coil Inductance (Le)0.29mH
Mechanical Q (Qms)8.87
Electromagnetic Q (Qes)0.45
Total Q (Qts)0.43
Compliance Equivalent Volume (Vas)1ft³
Mechanical Compliance of Suspension (Cms)0.43mm/N
BL Product (BL)8.95T·m
Diaphragm Mass Inc. Airload (Mms)36.9g
Maximum Linear Excursion (Xmax)6mm
Surface Area of Cone (Sd)226.9cm²

Materials of Construction

Cone MaterialAluminum
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Voice Coil FormerKapton® / Polyimide
Basket / Frame MaterialCast Aluminum
Magnet MaterialCeramic Ferrite

Mounting Information

Overall Outside Diameter8.85"
Baffle Cutout Diameter7.48"
Depth4"
# Mounting Holes6

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.7ft³
Sealed F374Hz
Vented Volume1.1ft³
Vented F339Hz

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