I think they are two different beasts all together. The HDC3 is a budget SPL sub, the mach5's appear to be a very low budget SQ sub.X2.. I think that I would purchase a lower budget driver from AQ before I would ever even think about purchasing one from Mach 5.. In fact, I cannot wait for the HDC3 to come out, as I plan on buying the 18.. //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif
To each their own...they both fit a niche depending on what your going for.
