At the risk of 'stepping in it' ...

I believe sehnzeleid is referring to interconnects and Altec is referring to speaker cable.

Assuming that the Monoprice coax is well made using good connectors, the major difference is the 'FNT™ Technology' of the AR cables, where FNT = Ferrite Noise Trap.

If my guess is correct, the FNT is basically a form of 'choke' in the electronic sense of the word, in this case with a ferrite core. The addition of this in the signal path serves to attenuate extraneous RF and/or digital signal harmonics from traveling via the interconnect. These high frequencies, many times above audio frequencies, can sometimes interfere with the performance of electronics on either end of the cable. In most cases this type of interference is already accounted for in the design of the electronics being connected, but if you have a special problem (or are somewhat paranoid about such interference) you might find use for these special cables.

If not having the 'choke' doesn't concern you, the Monoprice coax will do wonderfully. Then again, $60 for six cables is not too expensive of an experiment - if you're interested.