FKB113

Compact 5.25” Audio Upgrade with Premium Sound

Upgrade your vehicle’s audio system with the MB Quart FKB113 Formula Series 5.25-Inch 2-Way Coaxial Speakers. Designed for compact factory locations, these speakers deliver improved clarity, stronger midrange response, and enhanced overall sound quality compared to stock audio systems. With up to 90 watts peak power handling and 45 watts RMS at 4 ohms, they offer a reliable and efficient upgrade for daily listening.

The coaxial 2-way design integrates the woofer and tweeter into a single speaker structure, providing balanced sound reproduction and easy installation in a wide range of vehicles.

Advanced Materials for Clear, Balanced Audio Performance

The MB Quart FKB113 Formula Series Speakers are built with carefully engineered components to ensure high-quality sound reproduction and long-lasting durability. The aluminum dome tweeters deliver extended frequency response with crisp, natural highs and improved vocal clarity.

A polypropylene cone woofer provides lightweight rigidity for accurate midrange response and controlled bass output. The butyl rubber surround enhances durability while improving midbass impact and cone stability.

Additionally, the pure copper voice coil creates a strong magnetic field for improved efficiency and precise audio reproduction across all volume levels.

Wide Sound Dispersion with Durable Installation Design

The MB Quart FKB113 Speakers feature WIDESHERE technology, designed to expand the listening “sweet spot” so that multiple passengers can enjoy consistent sound quality throughout the vehicle. This makes them ideal for shared listening environments such as family cars and daily commuters.

A textured ABS gasket ensures a secure and rigid mounting seal, reducing vibration and improving acoustic performance. The design helps maintain sound accuracy while minimizing distortion during high-volume playback.

With a 5.25-inch compact size, these speakers fit many factory speaker locations, making them a simple yet effective upgrade for improved in-car audio performance.

Highlights

• 5.25-Inch 2-Way Coaxial Speaker Pair
• Up to 90 Watts Peak Power Handling
• 45 Watts RMS @ 4 Ohms for stable audio performance
• WIDESHERE Technology expands listening “sweet spot”
• Aluminum Dome Tweeters for crisp high-frequency detail
• Polypropylene Cone Woofer for accurate mids and bass
• Butyl Rubber Surrounds for durability and deeper midbass
• Pure Copper Voice Coil for strong magnetic efficiency
• Textured ABS gasket for secure mounting seal
• Designed for clear, distortion-free sound reproduction
• Ideal for factory speaker upgrades and replacements
• Formula Series tuned for balanced everyday listening

Package Contains

• 1 Pair of MB Quart FKB113 5.25" Formula Series Coaxial Speakers
• Mounting Hardware Kit
• Speaker Wiring / Terminals (if included by manufacturer)
• Installation / User Manual (if included by manufacturer)
• Manufacturer Retail Packaging Box