MB Quart XK2-116S 6.5" Slim-Mount Coaxial Speakers

The MB Quart XK2-116S is a pair of 6.5-inch, 2-way coaxial car speakers designed for vehicle audio upgrades where mounting clearance is limited. Its slim-mount format is intended to help fit locations that cannot accommodate a deeper conventional speaker. The system combines a woofer and tweeter in each speaker for a straightforward full-range replacement or upgrade.

Rated at 120 watts RMS and 240 watts peak per pair, the XK2-116S is suited to systems with power matched to its published continuous rating. Its 88 dB sensitivity and 55 Hz to 22 kHz frequency-response specification describe the product's stated operating range. These specifications make it a practical option for listeners seeking a compact coaxial speaker set for everyday music, spoken-word, and general in-car listening.

The 2-way coaxial layout places the high-frequency driver within the main speaker assembly, reducing the need to find a separate tweeter location. This can simplify an upgrade when replacing factory door, rear-deck, or other 6.5-inch speaker positions. The shallow profile is the central design consideration for installations with restricted depth behind the mounting surface.

Installation planning should account for the published 5.59-inch cutout diameter and 1.65-inch mounting depth from the flange. Vehicle-specific fitment can still vary based on factory brackets, window clearance, panel shape, and connector style. Confirm available depth and mounting-hole alignment before purchasing or beginning installation.

The XK2-116S can be used with a compatible factory radio or an aftermarket amplifier, provided the amplifier and wiring are selected appropriately for the speakers. It is a pair-based speaker system, making it suitable for upgrading two matching locations in a vehicle. For a balanced system, consider matching speaker placement and power delivery across the vehicle's front or rear channels.

Key Features

• 6.5-Inch Speaker Size: Fits many common car-audio speaker locations, subject to vehicle-specific fitment.
• 2-Way Coaxial Design: Combines woofer and tweeter functions in each speaker assembly.
• Slim-Mount Profile: Helps address installations with limited mounting depth.
• 120W RMS Per Pair: Provides a published continuous power-handling rating for the set.
• 55 Hz–22 kHz Response: Covers the product's stated low-to-high frequency range.
• 88 dB Sensitivity: Indicates the speaker system's published sensitivity rating.

Design & Installation

The XK2-116S uses a slim-mount 6.5-inch coaxial format with a 2-way speaker arrangement. Published product information confirms its shallow installation focus, but does not specify cone material, surround material, magnet type, voice-coil details, or basket material. Those unlisted construction details should not be assumed when planning a build.

Measure the vehicle opening against the 5.59-inch cutout requirement and verify at least 1.65 inches of clearance from the mounting flange. Check for interference from windows, door hardware, grilles, and factory mounting adapters before securing the speakers. Use compatible wiring and an amplifier or radio channel matched appropriately to the speaker system's power rating.