With the SP-SPSB-6, if you don't go with any sort of modification (they do one to make it smaller), you have the option of which roll-off setting to use. You can use one of the following:
16 Hz
69 Hz
95 Hz
107 Hz
160 Hz
195 Hz
888 Hz
I use the SP-SPSB-6 into my MT 24/96 (with the TRS dongle) and it suits me just fine. I'm also using the AT943 mics they sell. Can't go wrong with the SPSB-6 in my limited experience.