Originally Posted by JimP
How is it different from the original?
Jim, the MBM-12 MK2 has a new operating mode switch so that one can run it in either 'Sealed' or 'Ported' mode simply by adding or removing a supplied 4" foam port plug, and flipping the switch on the amp.
The advantage of the 'Sealed' mode is that the MBM rolloff will match the 24db/oct low-pass slope on our true subwoofers. So when the MBM is close or next to the true subwoofer, blending between the two should be improved. The advantage of the 'Ported' mode is that driver excursion demands are reduced, and there is a bit more output at some frequencies.
And as bsoko mentioned, the MBM-12 MK2 uses a nicer standard Satin Black finish (with "seamless" enclosure design), and will be available in several luxury finishes too (Real Wood Veneer Rosenut/Walnut/Espresso/Maple)...