DUAL 1 Ohm In stock for immediate dispatch
One of the biggest additions to the Xv5 lineup is also the smallest.
The Xv5-8 is the first 8″ subwoofer FI Car Audio has ever offered, bringing something completely new to the FI lineup while remaining unmistakably FI. Built from the ground up as a true 8″ platform, the Xv5-8 utilizes a dual-stacked ferrite motor, 2″ 4-layer D1/D2 voice coil, dual 6.3″ progressive spiders with a spacer, and a high-roll surround, with power handling rated at 500 watts RMS.
It’s a completely new size and platform for FI, built for applications where space and cone area are limited but customers still want the construction, appearance, and performance philosophy of an FI subwoofer.
Suspension throughout the Xv5 lineup is built around dual progressive spiders with an integrated spider spacer, with each suspension sized specifically for the application. The Xv5-8 utilizes dual 6.3″ progressive spiders
The Xv5-8 also features a high-roll surround, providing the clearance needed for the smaller-diameter platform to achieve its intended excursion. Across the entire Xv5 lineup, the surround is reinforced at the cone with a stitched surround-to-cone joint, adding mechanical strength to one of the most highly stressed areas of the moving assembly.
Every Xv5 is finished with a standard carbon fiber dust cap, maintaining the clean, recognizable FI appearance across the entire series.
From the all-new 8″—a size never before offered by FI—to the massive 18″, the Xv5 lineup is the most complete X Series yet. Each size is purpose-built around its specific platform, giving customers the ability to choose the space, cone area, and output their system demands while maintaining the same core X Series philosophy.
The goal with V5 is simple: continue refining one of FI’s most versatile subwoofer platforms while expanding what the X Series can be—without losing the performance, durability, value, and unmistakable FI DNA that have always defined it
Features
All-new 8″ — FI’s first-ever 8″ subwoofer
500W RMS Xv5-8
Dual-stacked ferrite motor structure
2″ 4-layer D1/D2 voice coil on the Xv5-8
Dual progressive spider suspension with sewn leads
Push terminals standard.
Integrated spider spacer
Stitched surround-to-cone joint
Standard carbon fiber dust cap
High-roll surround on the Xv5-8
Thiele-Small Parameters
| Xv5 8 | ||
|---|---|---|
| Coils | Dual 1/ Dual 2 | |
| FS | 38.01Hz / 36.02Hz | |
| RE | 2.125 Ohms/ 4.116 Ohms | |
| QMS | 4.447 / 4.924 | |
| QES | 0.710 /0.6115 | |
| QTS | 0.612/0.543 | |
| MMS | 119g/150g | |
| CMS | 0.00001/0.0001 | |
| SD | 158.8cm^2 | |
| VAS | 7.306 l/6.411l | |
| SPL | 80.08 1W/1m/79.5 1W/1m | |
| BL (NA) | 11.46/16.55 | |
| XMAX | 16mm (One Way) | |
| RMS | 500W |
Technical Specifications
| Xv5 8 | ||
|---|---|---|
| Overall Diameter | 219.7mm” | |
| Cutout Diameter | 190mm | |
| Mounting Depth | 156.7mm | |
| DriverDisplacement | 0.08cuft | |
| Sealed Box | 0.2-0.4 cuft | |
| Ported Box | 0.4-0.8 cuft @ 32Hz |


































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