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"Fit perfectly and worked exactly as expected — support was excellent."
Infinity Kappa Perfect 900X
Upgrade Your Vehicle With Confidence. This Is Built to Fit, Perform, and Last
Real installer support before and after purchase
Price Match Guarantee
Full Manufacturer 2 Years Warranty
Free 30-Day Returns
Check Compatibility
Only 2 left in stock
Ships within 1-3 days
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Infinity Kappa Perfect 900X | 6" x 9" Two-Way Marine/Motorcycle Speakers
The Kappa Perfect 900X is a high-fidelity speaker system specifically engineered for the extreme environments of motorcycles and marine vessels. Part of Infinity’s flagship "Perfect" line, these 6" x 9" drivers combine lightweight, durable materials like Basalt fiber with massive power handling to cut through wind and road noise. They feature a unique removable tweeter design, allowing you to install them as either a high-performance coaxial or a dedicated component system.
Product Highlights
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Basalt Fiber Woofer: Utilizing Plus One™ technology, the basalt fiber cone is incredibly stiff yet lightweight, providing more surface area than standard cones for deeper, more impactful bass.
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Removable Tweeter Design: Offers the flexibility to keep the tweeter mounted in the center (Coaxial) or move it to a custom location (Component) for a better soundstage.
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Extreme Weather Resistance: Boasts an IPX5 rating for the front of the speaker and superior weather resistance for the back, making it ideal for fairings and saddlebags.
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Edge-Driven PPS Tweeter: The 1" Polyphenylene Sulfide (PPS) dome tweeter is designed to reproduce perfectly crisp highs without the harshness often found in metallic domes.
Key Features
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Neodymium Magnet: Provides an exceptionally high magnetic flux for better control and efficiency while keeping the speaker significantly lighter than traditional ferrite-magnet models.
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Premium ID Design: Visually inspired by motorcycle and rider culture, featuring a sleek, rugged look that matches premium custom builds.
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High Efficiency: Designed to deliver high sound pressure levels (SPL) even when exposed to open-air environments at highway speeds.
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Harley-Davidson Optimized: Specifically suited for the demanding mounting requirements of touring bike saddlebags and fairing upgrades.
Technical Specifications
| Feature | Specification |
| Speaker Size | 6" x 9" |
| Design | 2-Way (Convertible Coaxial/Component) |
| Power Handling (RMS) | 100 Watts |
| Power Handling (Peak) | 300 Watts |
| Weather Rating | IPX5 (Front) |
| Magnet Type | Neodymium |
| Tweeter Material | PPS (Polyphenylene Sulfide) |
What’s In The Box?
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(2) Infinity Kappa Perfect 900X 6"x 9" Speakers
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(2) Removable Tweeters
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(2) Crossover networks
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Mounting hardware and gaskets
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Owner’s manual
- Ships within 1–3 business days from our warehouse
- Tracking included with every order
- Free 30-day returns if it doesn’t work for your setup
- 2-year manufacturer warranty
- Authorized dealer guarantee
- Real installer-backed support before and after purchase
Infinity Kappa Perfect 900X
Sale price$649.95
Why This Upgrade Makes Daily Driving Better
Ease of Use & Safety
Hands-free control reduces distraction and frustrationwhile driving.
Expandable by Design
Add backup cameras, better speakers, amps, or subsanytime.
FITMENT & INSTALLATION MADE SIMPLE
WHAT VEHICLES IT WORKS WITH
FIND THE RIGHT PRODUCT FOR YOUR EXACT VEHICLE
We verify compatibility before you buy, no guesswork.
DIY FRIENDLY IF:
- You're comfortable with basic tools
- You follow provided instructions
PROFESSIONAL INSTALL RECOMMENDED IF:
- Your vehicle requires dash kits or wiring adapters
- You want a turnkey experience
INSTALLATION CREDIT & SUPPORT:
- $75 Installation Credit when purchased online
- Speak to real installers before you buy
- Bring it into one of our locations for install
40 Years of Installation Experience
Tens of Thousands of Installs Completed
Authorized Dealer Full Warranties
Why Buying This Here Is Safer Than Anywhere Else
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Verified Vehicle Fit
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Authorized Products
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Easy Returns
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Physical stores & real installers
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FREQUENTLY ASKED QUESTIONS
FREQUENTLY ASKED QUESTIONS
How do I know this stereo or speaker will fit my car?
Select your year, make, and model using the Vehicle Fit Guide at the top of the page. You’ll only see products that are compatible with your exact vehicle setup.
What happens if I order something that doesn’t fit?
You can return or exchange it within 30 days. We’ll help you identify the correct part for your vehicle so you don’t have to guess again.
Are these products brand new and covered by warranty?
Yes — all products are brand new, authentic, and sold as an authorized dealer, which means they include a full manufacturer warranty.
Can you install this for me, or do I need to do it myself?
You can do either. Install it yourself, or use your $75 installation credit at our shop and have it professionally installed by our team.
What if I don’t know what to choose for my car?
Tell us your vehicle and what you want to improve (sound, bass, CarPlay, etc.). We’ll recommend the exact products that fit your car and your budget.
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Free Shipping to the Lower 48 States
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