Fitting a 4 inch coaxial kit to your car
A coaxial kit places the treble and midrange in a single frame, so each side needs only one opening. The ICU 100 uses a 4 inch driver with an inverted dome tweeter at its center.
Our advice is to measure your factory opening and available depth first, because the frame, magnet and mounting tabs still have to clear the panel even when the diameter matches.
| Product detail | Value to match to your vehicle |
|---|---|
| Product | Focal ICU 100 4 Inch Coaxial Kit |
| Model | ICU100 |
What it will not do
Treat this as a speaker replacement rather than a full system upgrade. The driver includes an integrated 6 dB/oct crossover for the tweeter, but it does not add an amplifier, subwoofer or signal processing.
Keep your power expectations in line with the 40 W RMS nominal rating. A larger number on the box does not raise what the driver handles continuously.
We'd skip it if you need a plug-and-play harness or an amplified package.
The $119.45 price and its context
- Amazon price
- $119.45
- Customer rating
- 4.5
- Customer reviews
- 96
- Typical price over 90 days
- $140.19
- Difference
- $20.74 (15 percent)
The kit is listed at $119.45, which is $20.74 below the typical price over the last 90 days of $140.19. That works out to 15 percent off that average.
The rating sits at 4.5 from 96 reviews. Nothing here changes what the driver handles, so weigh the price against your fitment measurements.
Power, mounting and connection checks
Match your amplifier channels to the 40 W RMS nominal rating and set gains conservatively. If you are running them from a factory head unit, confirm the output impedance and the power it actually delivers.
Mounting depth, screw spacing and any adapter ring decide whether the frame sits flush. Check the included accessories and your opening measurements before you cut or bend anything.
Who should choose this kit
Choose it if you have confirmed a 4 inch opening and want a coaxial with a dedicated tweeter and an integrated crossover. It suits a straightforward front or rear speaker refresh.
Skip it if mounting depth or a factory amplifier makes the swap uncertain, or if you want more acoustic output than the 40 W RMS rating supports.
Specifications
| Model | ICU100 |
|---|