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SIG120-4 4” Signature Series Extended Range 40W Driver 4 Ohm
Quick Overview
The Dayton Audio Signature Series was designed to give DIY 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.
Product Highlights
- Extensive Klippel LMP 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
Product Manuals / Spec Sheets / Downloads
Dayton Audio SIG120-4 Specification SheetDayton Audio SIG120-4 Graphs/FRD/ZMA Data File
Buying Options
Dayton Audio SIG120-4 4” Signature Series Extended Range 40W Driver 4 Ohm
The Dayton Audio Signature Series was designed to give DIY 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: 4"
- Power Handling (RMS): 40 watts
- Power Handling (MAX): 80 watts
- Impedance: 4Ω
- Frequency Response: 75 - 8,500 Hz
- Sensitivity: 89.7dB @ 2.83V/1m
- Voice Coil Diameter: 26.6mm
- Maximum Linear Excursion: 4mm
Signature Sound and Performance
The smooth and extended frequency response of these Dayton Audio speaker drivers ensures that the 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 CNC'd 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.
| Speaker Series | Signature Series |
| Model Number | SIG120-4 |
| Color | Black |
| Unit of Measure | Each |
| UPC | 848791009051 |
| Warranty - Parts | 5 Years |
| Warranty - Labor | 5 Years |
| Product Shipping Weight (lbs.) | 1.82 |
| Speaker Type | Woofer |
| Power Handling (RMS) | 40 watts |
| Power Handling (max) | 80 watts |
| Continuous Program Power | -- |
| Impedance | 4 ohms |
| Sensitivity | 89.7 dB @ 2.83V/1m |
| Frequency Response | 75 - 8,500 Hz |
| Voice Coil Diameter | 26.6 mm |
| Magnet Weight | -- |
| DC Resistance (Re) | 3.7 ohms |
| Voice Coil Inductance (Le) | 0.22 mH |
| Resonant Frequency (Fs) | 74.6 Hz |
| Mechanical Q (Qms) | 4.84 |
| Electromagnetic Q (Qes) | 0.47 |
| Total Q (Qts) | 0.43 |
| Diaphragm Mass Inc. Airload (Mms) | 6.7g |
| Moving Mass Of Diaphragm (Mmd) | -- |
| Mechanical Compliance of Suspension (Cms) | 0.68 mm/N |
| Surface Area Of Cone (Sd) | 56.4 cm² |
| Volume of Displacement (Vd) | 28.2 cm³ |
| BL Product (BL) | 5.0 Tm |
| Compliance Equivalent Volume (Vas) | 3.1 liters |
| Maximum Linear Excursion (Xmax) | 4 mm |
| Drivers Mechanical Losses (Rms) | -- |
| Cone / Diaphragm Material | Aluminum Cone |
| Entry / Exit Diameter | -- |
| Surround Material | Rubber |
| Voice Coil Wire Material | Copper |
| Voice Coil Former | Glass fiber |
| Basket/Frame Material | Cast aluminum |
| Magnet Material | Ferrite |
| Overall Outside Diameter | 122.9 mm |
| Overall Depth | 56 mm |
| Baffle Cutout Diameter | 95 mm |
| # Mounting Holes | 6 |
| Mounting Hole Diameter | -- |
| Bolt Circle Diameter | -- |
| Product Weight | -- |