Its a bandpass filter.
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MIT Cables have been addressed by this forum in the past. Here is a thread where we have expressed numerous observations and opinions that may help answer some of your questions (although I would not say we all covered ourselves with glory):
Joe Abrams has it right. Impedance matching, group delay compensation, power factor correction, zobel filtering (lpf), and high frequency control via ferrite rings have all been part of MIT's game plan at one time or another. You can safely assume that other manufacturers have measured their effectiveness, though I wouldn't anticipate published results on the performance of these, or any other, cables, especially under a variety of real world load conditions, grounding variations etc. It's really too bad this doesn't happen. Many issues in cable design could stand a good airing out.