MB Quart XK2-108 3.5" 2-Way Coaxial Speakers

The MB Quart XK2-108 is a pair of 3.5-inch 2-way coaxial car speakers designed for compact factory speaker locations. It is intended for drivers looking to replace worn or limited-range small speakers in a vehicle audio system. The coaxial format combines the speaker elements into a space-conscious assembly suited to small mounting positions.

This speaker system is rated for 70 watts RMS and 140 watts peak power per pair. Those pair-level ratings help shoppers match the speakers with an appropriate source unit or amplifier after confirming system compatibility. The compact format makes the XK2-108 a practical option where a larger replacement speaker is not possible.

MB Quart lists an 88 dB sensitivity and a 55 Hz to 22 kHz frequency response for the XK2-108. This range is designed to cover midrange and high-frequency content within a small speaker location. For a system with greater low-frequency output, these speakers can be used alongside a properly matched subwoofer system.

The XK2-108 uses a 2-way coaxial design to place multiple frequency-producing elements in one speaker assembly. This approach simplifies installation compared with systems that require separate tweeter mounting locations. It is useful for vehicle locations that have limited space behind a grille or dashboard panel.

Before purchase, compare the vehicle's factory opening with the specified 3.41-inch cutout requirement and verify rear clearance for the 1.5-inch mounting depth from the flange. Confirm connector style, mounting-hole alignment, polarity, and available space behind the panel before installation. Vehicle-specific brackets, adapters, wiring harnesses, or spacers may be needed depending on the application.

Key Features

• 3.5-Inch Speaker Size: Fits compact speaker locations where space is limited.
• 2-Way Coaxial Layout: Combines speaker elements in one mounting assembly.
• 70W RMS Per Pair: Provides a continuous power-handling reference for system matching.
• 140W Peak Per Pair: Indicates the listed short-term maximum power rating.
• 88 dB Sensitivity: Supplies a published efficiency reference for comparison.
• 55 Hz–22 kHz Response: Covers a broad stated range for small car speakers.

Design & Installation

The XK2-108 is built as a compact coaxial speaker system with a 3.5-inch nominal diameter. MB Quart describes the construction as using high-quality materials for durability and reliability, but detailed cone, surround, magnet, and voice-coil specifications are not published in the confirmed product information. Its integrated 2-way layout is designed to keep the installation footprint compact.

Use the 3.41-inch cutout diameter and 1.5-inch depth from the flange as starting points when checking fitment. Measure the opening, mounting-hole pattern, and clearance to HVAC ducts, window mechanisms, trim, or other components before installing. The listing does not confirm included mounting hardware, adapters, grilles, or wiring harnesses, so plan for vehicle-specific parts if required.