This 15/6 from Don @ LDS arrived last month. Thoroughly pleasing, huge tone. Exceptional manufacturing quality. The sub driver is a Emminence Kappalite 3015LF; the mid is a 6.5" 18Sound 6ND410. Crossover is @ 800hz. No tweeter. Tolex cover. Couldn't be happier with this cab! A big motivation was to get the tone of a 15 in a lightweight and compact package; this weighs under 45 pounds (would be lighter, but I wanted the metal grill). The ShuttleMAX12 peaks at 375 watts @ 8 ohms, so I added the QSC PLX3602 and WOW - the cab REALLY opens up with the extra power, providing a deeper, richer, more commanding full tone. Using the ShuttleMAX12 as a preamp, the QSC powers the 15/6 with 725 watts off one side. More than enough volume for any internal venue. I'm adding another 15/6 for outside venues w/o PA support. Note how the 23.5"W x 22"T x 18"D dimensions perfectly fit the rack. Would work fine for a tube amp.