CFC120-8 4-1/2" Carbon Fiber Extended Range Woofer 8 Ohm
Quick Overview
The Dayton Audio CFC120-8 delivers impressive bandwidth from an affordable 4-1/2" 8Ω extended-range woofer. Its woven carbon fiber cone combines low mass with excellent rigidity for clean, detailed sound, while a vented motor and aluminum voice coil former help maintain consistent performance as output increases. With response extending from 50 to 8,500 Hz, the CFC120-8 is a great choice for compact 2-way speakers and other budget-friendly DIY projects where space is limited.Product Highlights
- Woven carbon fiber cone combines low mass and excellent rigidity for clean, detailed sound
- Wide 50 to 8,500 Hz response makes it a great choice for compact 2-way designs
- Vented pole piece improves voice coil cooling to help reduce power compression
- 2 .5 mm Xmax provides useful low-frequency output from compact speaker designs
- Low-profile flange supports flexible flush or surface mounting
Product Manuals / Spec Sheets / Downloads
Dayton Audio CFC120-8 Specification SheetBuying Options
Get premium cone construction, broad usable bandwidth, and flexible 8Ω compatibility in one compact, budget-friendly driver. The Dayton Audio CFC120-8 pairs a woven carbon fiber cone with a compact 4-1/2" design to deliver clean, detailed sound that works especially well in small 2-way speakers and other space-conscious builds. It’s an easy choice for DIY projects that need solid performance, simple integration, and great value.

Key Specs:
- Nominal Diameter: 4-1/2"
- Power Handling (RMS): 30 Watts
- Power Handling (MAX): 60 Watts
- Impedance: 8Ω
- Frequency Response: 50 – 8,500 Hz
- Fs: 60 Hz
- Qts: 0.56
- Vas: 0.163 ft³
- Sensitivity: 84.0 dB 2.83V/1m
- Voice Coil Diameter: 1"
- Maximum Linear Excursion: ±2.5 mm
Lightweight Carbon Fiber with Efficient Motor Cooling
A woven carbon fiber cone gives the CFC120-8 a stiff, lightweight diaphragm that helps maintain clarity across its broad operating range. Its rigid construction helps resist unwanted flexing as output increases, keeping vocals, instruments, and other critical midrange content clean and detailed. The distinctive woven finish also gives the driver a premium appearance that stands out well beyond its affordable price.
A 25 mm 2-layer voice coil wound on an aluminum former provides a lightweight and responsive foundation for the moving assembly. The vented pole piece provides airflow through the motor to improve voice coil cooling and help reduce power compression during demanding use. Combined with the ferrite magnet, this design helps the CFC120-8 maintain consistent performance as listening levels increase.

Useful Bass Extension with Versatile Mounting
With 2.5 mm of Xmax and response extending down to 50 Hz, the CFC120-8 delivers useful low-frequency capability for a compact 4-1/2" driver. Its low-loss rubber surround and large-diameter flat spider provide stable suspension and allow smooth, controlled cone movement throughout its excursion range. A poly dust cap adds damping to help control unwanted resonances.
The CFC120-8’s broad frequency response makes it an excellent choice for compact 2-way speaker designs, providing useful bass extension while reaching high enough to integrate with a wide variety of tweeters. Its low-profile stamped steel frame is suitable for both flush and surface mounting, giving builders additional flexibility when enclosure depth or installation space is limited. The 8Ω impedance also provides convenient options for single- and multiple-driver system configurations.

Versatile Performance Without the Premium Price
With a frequency response of 50 to 8,500 Hz and 84 dB sensitivity at 2.83 V/1m, the CFC120-8 combines useful bass extension and broad midrange coverage in a compact package. Its wide operating range makes it especially versatile for small bookshelf speakers, compact 2-way systems, and custom DIY projects. Best of all, it delivers carbon fiber cone construction and thoughtful performance features at a price that makes great-sounding speaker projects easier to build.
| Speaker Series | Carbon Fiber |
| Model Number | CFC120-8 |
| Color | Black |
| Unit of Measure | Each |
| UPC | 848791012259 |
| Warranty - Parts | 5 Years |
| Warranty - Labor | 5 Years |
| Weight | -- lbs. |
| Speaker Type | Woofer |
| Nominal Diameter | 4-1/2" |
| Power Handling (RMS) | 30 watts |
| Power Handling (max) | 60 watts |
| Impedance | 8 ohms |
| Sensitivity | 84.0 dB @ 2.83V/1m |
| Frequency Response | 50-8,500 Hz |
| Voice Coil Diameter | 25 mm |
| DC Resistance (Re) | 7.2 ohms |
| Voice Coil Inductance (Le) | 0.49 mH @ 1 kHz |
| Resonant Frequency (Fs) | 60 Hz |
| Mechanical Q (Qms) | 2.91 |
| Electromagnetic Q (Qes) | 0.69 |
| Total Q (Qts) | 0.56 |
| Diaphragm Mass Inc. Airload (Mms) | 6.7g |
| Surface Area Of Cone (Sd) | 55.6 cm² |
| BL Product (BL) | 5.13 Tm |
| Compliance Equivalent Volume (Vas) | 4.61 liters |
| Maximum Linear Excursion (Xmax) | 2.5 mm |
| Cone / Diaphragm Material | Carbon Fiber |
| Surround Material | Rubber |
| Basket/Frame Material | Stamped Steel |
| Magnet Material | Ferrite |
| Overall Outside Diameter | 110 mm |
| Overall Depth | 61.8 mm |
| Baffle Cutout Diameter | 80 mm |
| # Mounting Holes | 4 |

