FKB110

Compact 4-Inch Speaker Upgrade for Clear Car Audio

Enhance your vehicle’s sound system with the MB Quart FKB110 Formula Series 4-Inch 2-Way Coaxial Speakers. Designed for compact factory speaker locations, these speakers deliver improved clarity, balanced sound output, and stronger overall performance compared to stock audio systems. With 80 watts peak power handling and 40 watts RMS at 4 ohms, they provide reliable performance for daily driving.

The coaxial 2-way design integrates a woofer and 1-inch tweeter into a single compact unit, ensuring efficient sound reproduction and easy installation in a wide range of vehicles.

Durable Engineering for Clean, Balanced Sound Performance

The MB Quart FKB110 speakers are built using high-quality materials engineered for durability and accurate audio reproduction. The aluminum dome tweeters deliver crisp, clear high frequencies with improved reliability and reduced distortion at higher volumes.

A polypropylene cone woofer provides lightweight rigidity for controlled midrange response and improved bass performance. The butyl rubber surround enhances durability while allowing deeper midbass impact and smooth cone movement.

A pure copper Kapton voice coil combined with a ferrite magnet structure ensures strong magnetic efficiency and consistent sound output, even during extended listening sessions.

Advanced Cooling & Smooth Frequency Performance

The MB Quart FKB110 Formula Series Speakers include an over-coil cooling system that allows air to flow through the voice coil assembly, helping regulate temperature and improve long-term durability under demanding conditions.

A built-in 12dB internal crossover network ensures smooth transitions between midrange and tweeter frequencies, reducing harshness and delivering balanced sound reproduction across all music types.

Compact yet powerful, these 4-inch speakers are ideal for factory replacements where space is limited but audio quality still matters.

Highlights

• 4-Inch 2-Way Coaxial Speaker Pair
• Up to 80 Watts Peak Power Handling
• 40 Watts RMS @ 4 Ohms for stable performance
• Integrated 1-Inch Aluminum Dome Tweeters
• Polypropylene Cone Woofer for balanced midrange output
• Butyl Rubber Surround for durability and deeper bass response
• Pure copper Kapton voice coil for efficiency
• Ferrite magnet structure for strong sound output
• Built-in 12dB internal crossover network
• Over-coil cooling system for improved thermal management
• Compact design ideal for factory 4-inch speaker locations
• Formula Series engineered for clear, distortion-free sound

Package Contains

• 1 Pair of MB Quart FKB110 4-Inch 2-Way Coaxial Speakers
• Mounting Hardware Kit
• Speaker Wiring / Terminals (if included by manufacturer)
• Installation / User Manual (if included by manufacturer)
• Manufacturer Retail Packaging Box