About the Infinity Kappa 83WDSSI
Product highlights:
- Featured in our article: Best 8" car subwoofers for 2025
- 8" subwoofer with selectable 2- or 4-ohm impedance
- coated glass-fiber cone with rubber surround
- steel basket
- terminals accept up to 8-gauge speaker wire
- frequency response: 30-175 Hz
- power handling: 400 watts RMS (1200 watts peak power)
- sensitivity: 91 dB
- top-mount depth: 5.42"
- cutout diameter: 7.3"
- sealed box volume: 0.5 cu. ft.
- ported box volume: 1.0 cu. ft.
- grille not included
- warranty: 3 years
- MFR # INFSUBKA83WDSSIAM
- Item # 108K83WDS
- California customers: Please click here for your Proposition 65 WARNING.
What's in the box:
Infinity Kappa 83WDSSI owner's manual
If you need assistance accessing this owner's manual, please give us a call.- One 8" Subwoofer
- Screw cover trim ring
- Adhesive-backed foam gasket
- Eight 1" Screws
- Owner's manual (English/ French/ Spanish/ fifteen other languages)
More details on the Infinity Kappa 83WDSSI
Features & specs
| Features and Specs | ||
|---|---|---|
| Size | 8-inch | |
| Impedance (Ohms) | 2, 4 | |
| Cone Material | Glass Fiber over Paper | |
| Surround Material | Rubber | |
| Basket Material | Steel | |
| Grille | None included | |
| Free-Air | Yes | |
| Dual Voice Coil | No | |
| Sensitivity |
91 dB at 2.83 volts | |
| Frequency Response | 30 - 175 Hz | |
| Max RMS Power Handling | 400 | |
| Peak Power Handling (Watts) | 1200 | |
| Top Mount Depth (inches) | 5 1/4 | |
| Bottom Mount Depth (inches) | 5 5/8 | |
| Cutout Diameter or Length (inches) | 7 5/16 | |
| Frame Width | 9.041 | |
| Frame Length | 9.041 | |
| Vas (liters) | 9.12 | |
| Fs (Hz) | 42.2 | |
| Qts | 0.548 | |
| Xmax (millimeters) | 10.25 | |
| Parts Warranty | 3 Years | |
| Labor Warranty | 3 Years | |
| Box Requirements | ||
| Ideal Sealed Box Volume (cubic feet) | 0.5 | |
| Minimum Sealed Box Volume (cubic feet) | N/A | |
| Maximum Sealed Box Volume (cubic feet) | N/A | |
| Ideal Ported Box Volume (cubic feet) | 1 | |
| Minimum Ported Box Volume (cubic feet) | 0.8 | |
| Maximum Ported Box Volume (cubic feet) | 1.45 | |
| Port diameter (inches) | 3 | |
| Port length (inches) | 10 | |
Product Research
Features
Enclosure Compatibility
Specifications
Features
Selectable Smart Impedance (SSI): A switch on the input terminal allows you to easily change the woofer's impedance between 2Ω and 4Ω settings. (The connected amplifier should be off when changing the impedance.) The power handling is the same for either setting; 450 watts RMS/1350 watts peak.
Cone: The cone material is a composite of glass fiber over a paper pulp material. Adding the glass fiber layer increases cone rigidity to improve bass accuracy, while the pulp base improves the sub's damping characteristics.
Terminal: The spring terminals will accept bare wire up to 8 gauge.
Enclosure Compatibility
Sealed Box: Infinity recommends a sealed enclosure with an internal volume of 0.5 ft³. Sealed enclosures provide the most control over a woofer and provide accurate sonic reproduction, making them suitable to all types of music.
Ported Box: Infinity recommends a ported enclosure with an internal volume of 1.0 ft³ with one 3" diameter x 10" long port, resulting in a tuning frequency of 45 Hz. They also recommend using a sub-sonic filter. Ported enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from a given amount of power.
Free-air Mounting: In addition to being compatible with sealed and ported enclosures, the woofer can be used in free-air applications. A free-air subwoofer is designed to be mounted on a baffle board, which separates the front of the speaker from the back. For instance, you could mount this woofer to a board attached to the rear deck or placed in the trunk against the rear seat. The trunk acts as the enclosure housing the subwoofer. Because there is no specific volume of air to stiffen the suspension, the free-air power handling is approximately half that of the woofer in a box, in this case 200 watts RMS.
Specifications
Thiele-Small Parameters: Because the woofer has two impedance settings, there are two sets of Thiele-Small parameters:
| 2Ω | 4Ω | |
|---|---|---|
| DC Resistance (Ω) | 2.26 | 4.71 |
| Inductance (mH) | 1.48 | 1.406 |
| Vas (liters) | 9.12 | 9.759 |
| Qms | 4.13 | 2.438 |
| Qes | 0.632 | 0.689 |
| Qts | 0.548 | 0.537 |
| Fs (Hz) | 42.2 | 42.3 |
| Radiating Area (cm²) | 226.98 | 226.98 |
| Xmax (mm) | 10.25 | 10.25 |
| Motor Force Factor (TM) | 10.375 | 13.87 |
The Infinity Kappa 83WDSSI replaces these items:
- coated glass-fiber cone with rubber surround
- power handling: 400 watts RMS (1600 watts peak power)
- top-mount depth: 5-1/4"
Loading...
Loading accessories...
Customer Q&A
3 questions already asked
Loading...
Loading articles...
Small but mighty. This sub does an amazing job. Paired with Infinity Kappa door speakers and the music comes alive in my truck. This fills in the low notes that the door speakers don't get down to. It will bump if you want it to as well. the 2ohm/4ohm selector makes wiring easy.
Jacob from Meridian, ID