Different versions of Micca MB42X and MB42X-C: Original, MKII, MKIII

At Micca, we continuously look for ways to improve our products for better performance, quality, and value. Since introduction, MB42X and MB42X-C speakers have undergone evolutionary updates as described below:

Original Release – Based on MB42, with the following differences

• 8-element 12dB/Octave crossover upgrade
• Matte black vinyl
• Magnetic grill system.

MKII – Serial numbers start with “MB42XMKII” or “MB42XCMKII”.

• Slight adjustments to woofer and tweeter response characteristics
• Flared plastic port tube (MB42X only)
• Additional internal bracing at four side enclosure walls
• Poly fill stuffing added

MKIII – Serial numbers start with “MB42X3” or “MB42XC3”

• 9-element 18dB/Octave crossover
• Tighter driver response tolerance

MKIII crossovers are backwards compatible with all previous versions and provides the following benefits:

• Steeper slopes for reduced distortion and acoustic lobing
• Adjusted roll off frequency for improved phase integration
• Updated driver level matching to result in overall smoother response

Posted in: Micca MB42X, Micca MB42X-C