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The Maximo Ultra MKII coaxial speakers carry on the tradition of bringing impressive sound quality at an affordable price to car audio enthusiasts. These evolutionary speakers perform at a higher level than ever, while cosmetic upgrades bring a take on a refined appearance befitting their performance.

The Maximo Ultra Coax MKII coaxial speakers are engineered for easy installation in original factory locations. Carefully tuned, the coaxial design produces a dynamic sound with excellent off-axis dispersion, resolution, and crisp detail to overcome some of the acoustic limitations of original speaker placement.

Built with exceptional components, the powerful magnet motor system, integrated crossover, and a soft tweeter, the Maximo Ultra MKII coaxial speakers handle up to 100 watts of power with authority.

Regardless of what you drive or what music genre you enjoy listening to, it promises to elevate your listening experience to a new level.

Available sizes 4″, 5″, 6″ and 6×9″, grilles included.



High-grade Ferrite magnet

Ferrite magnets are the most commonly used in speakers. While they look similar, there are several grades of magnets. Morel uses only the highest intensity available in its designs. As a result, Morel’s magnetic systems are highly compact yet deliver more magnetic flux than conventional ferrite magnets.

MXR Crossover

Morel Crossover Resolution (MXR) system combines high-quality components and varying features that improve the sound presentation and overall sound quality of Morel’s systems. The MXR crossover system is designed to ensure that drivers integrate seamlessly with minimum loss of signal quality to preserve the natural and tonal balance of our speakers.

Paper cone

In use since the first loudspeakers, the paper continues to be an exceptional material of choice. Morel’s latest paper composite cones are ultra-lightweight, making them an exceptional pairing for drivers using smaller motors and voice coils.


Model Size & Configuration Power Handling (Wrms) / Peak Power (W) Sensitiity (2.83V/1M)(dB) Frequency Response (Hz)
MAXIMO ULTRA COAX 402 MKII 4" Coaxial 50 /100 87.5 75-20000
MAXIMO ULTRA COAX 502 MKII 5¼" Coaxial 80 / 140 89.5 55-20000
MAXIMO ULTRA COAX 602 MKII 6½" Coaxial 90 / 160 91 55-20000
MAXIMO ULTRA COAX 692 MKII 6x9" Coaxial 110 / 200 92 45-20000