Are you buying the right interconnects ?

He wasn't a reviewer for Stereophile when he cut that cable apart....

many people have cut cables apart, btw...

re the idea of matched impedance ...device to device as done by the cable, this can be handled differently:

In a fluid metal as a conductive pathway... the connectivity is like an arc strike and is a dynamic flow matching system.

In a wire, this cannot happen. But with a room temperature fluid alloy (fluid at the molecular level, like water) --- it does.

It is not a perfect system, but it is notably better than 'wire'. This is just the straight up physics of it.

Popcorn anyone?

Unless the MIT cable was specifically designed to have high impedance and roll off the highs, which is completely possible, then the highs should not be affected and the bass not at all. TV and Radio stations will tend to buy from specialty distributors, so this advice seems odd. Most could not tell you the capacitance of their cables I suspect.

Teo_Audio, just looked at your website after reading your point and it is not making sense to me. Impedance matching is a factor of matching source impedance and load impedance to the cables. That would be a factor of unit resistance, unit inductance, and unit capacitance, the latter being a factor of conductor distance, shape and dielectric, inductance primarily spacing and material, and unit resistance obviously exclusive to the conductor. With load impedances 20-100K ohms, matching is near impossible if not impossible as connectors to match that do not exist. Ditto on the source impedance but at least close.
Your cables if I am reading this have a liquid at room temperature conductive, it looks to be pretty much the same as what is in a thermometer? That would conduct significantly poorer than a copper or silver conductor, or even that material when solid. That resistance would increase impedance a bit in cable, but I don’t see how that would make a change significant enough for cable matching. Can you shed more light on that?

I had a similar experience with MIT interconnects.....  I had a bad one and swapped it out with a pair of Nordost Blue Heaven.  Night and day, it was like I pulled a blanket off my speakers.   Crack one of those "Terminator" boxes open and you will find a 20 cent resistor and a 50 cent cap.   

I swapped out my tuner , preamp to amp , and DAC with cables that do not have a "network" and I am hearing tons of high frequency information that was robbed with the MIT.   FWIW  I had a Transparent Link II that I cracked open the box and it was pretty pathetic what's inside.   I took the other Link and put it between my sub DSP and sub and it attenuated the output....   so it seems they are not a pure conduit for the music.   

@oddiofyl, I had the experience with MIT interconnects long ago. Replaced with a mid level Monster cable (early 80’s), it was like night and day.