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

The MB Quart XK2-108 is a compact 3.5-inch 2-way coaxial speaker pair engineered to deliver punchy, detailed car audio with 70W RMS (140W peak) while fitting into tight factory locations.

These coaxial speakers are designed to replace small factory units and bring clearer midrange, tighter bass extension, and crisp highs without a major install. With an 88dB sensitivity and a frequency range that reaches from 55Hz up to 22kHz, the XK2-108 balances efficiency and extended detail so common listening material sounds fuller and more musical. Their shallow mounting depth and modest cut-out size make them a practical upgrade for many compact doors, dashboards, and kick panels.

How will these speakers change the sound in my car?

Switching to the MB Quart XK2-108 improves clarity, imaging, and dynamic response versus typical stock speakers. The dedicated midrange cone and coaxial tweeter work together to reveal more instrument detail and cleaner vocals at lower distortion.

• Stronger midrange presence for clearer vocals and instruments.
• Improved high-frequency detail from the integrated tweeter.
• Reduced distortion at moderate listening levels thanks to quality materials.

Will these fit my vehicle and how easy is the install?

These 3.5-inch speakers are built for compact OEM cut-outs: a 3.41-inch cut-out diameter and a flange-to-depth of 1.5 inches keeps them compatible with many small factory openings. Their coaxial design means you don’t need separate tweeter mounts, which simplifies swapping them into existing locations.

• 3.41-inch cut-out suits many older and compact car speaker holes.
• 1.5-inch depth from the flange avoids interference with inner door panels.
• Coaxial tweeter removes need for additional wiring or external mounts.

How much power can they handle and what does that mean for performance?

The XK2-108 pair is rated for 70 watts RMS and 140 watts peak power per pair, offering a balance of continuous power handling and short-term headroom for dynamic passages. This rating makes them a match for many aftermarket head units and modest amplifiers without overtaxing the speakers.

• 70W RMS supports steady loudness without overheating.
• 140W peak provides extra headroom during transient peaks.
• 88dB sensitivity helps achieve good volume from stock stereos.

What sound frequencies do these speakers reproduce well?

The response spans 55Hz to 22kHz, covering most of the important midbass through upper treble range that defines clarity and presence. While not extending to subwoofer deep-bass, they deliver usable low end for small enclosures and a clear high end for vocals and cymbals.

• Low end down to 55Hz for audible bass impact in small spaces.
• Full midrange reproduction for accurate vocal tone.
• High-frequency coverage to 22kHz for crisp treble detail.

Who is this for? The MB Quart XK2-108 is aimed at drivers who want a meaningful sonic upgrade without extensive modifications: owners of compact cars, classic models, or any vehicle with limited mounting depth who still expect clear, dynamic audio. If you use your factory head unit or a modest aftermarket system and need a direct-fit, high-quality coaxial solution, these speakers provide a durable, well-balanced improvement to daily listening.