In the design development of any better quality speaker designed for reproduction of full-range audio, the cabinet, it's volume, shape, rigidity & bracing, use and type of internal damping materials, suitability to selected drivers, etc. are integral to the final result.
This includes whether the designer chooses to use a ported, sealed other other style of cabinet design, and the related impact of that decision as it affects low frequency extension and linearity, system efficiency, changes to impedance vs. frequency, and so on.
Although you might be satisfied by using, e.g. B&C coaxial drivers in a typical undamped guitar cabinet, it ain't gonna be "hi fi". It'd be a crap shoot with the major consideration being whether you're easily satisfied.
Not that PA-category monitors are the paradigm of accuracy, but I think if you look for either a decent passive or active monitor that works for you, you're better off.