Your favorite OCC speaker cable

@hide45, Glad you did not jump off. I am much interested in this thread. 

navships, have his wire throughout entire system, Best bang for the buck. and  very low priced, $50-$100, 
high tech aero space/navy wire

AP OFC VS. OCC (Crystal)

Comparing the Analysis Plus OFC (Copper Oval-In Micro) cable versus the next-level-up Analysis Plus OCC (Crystal), there is an audible difference for sure. I have both types and compare both periodically. Both are nice cables and do sound quite different from one another.

AP Crystal OCC:
On my system, not only is the occ crystal version more open and wider as noted by @hilde45, these cables also have:

-more low end extension of BASS
-SMOOTHER sound, no edge or grain
-larger/wider SOUNDSTAGE (yes)

Woah:
The first time I tried a pair of the AP "Crystal" OCC cables it was so different for a split second I thought an input tube on one of my mono tube amps had gone microphonic or something. Switched back to OFC, nope. They OCC cable is just so much lager, wider, spatial.  Kind of intimidating at first and they do need lots of settling in.
At first, It took a while to comprehend and appreciate the difference after having used all sorts of different OFC, pure copper, silver over copper cables from other top manufacturers. They pass-thru what is there from the source, good or bad. If you want a veiled over passive filter type interconnect or speaker cable, the AP "Crystal" OCC cables are not it.  After getting use to the occ crystal cables ended up going back and swapping CAPs on my DAC and re-rolling a bunch of different input tubes on my preamplifier and amplifiers, now hearing input tube changes more than ever with AP OCC Crystal cables. Would have not believed it myself until I finally demoed a few pairs and bought some.

@mesch Glad it's beneficial. The quality of the company is still high enough! No sociopaths ruling the thread, yet.

As there has been a suggestion that DIY Cable 'might' be a consideration, even though the quality of the Termination might not match a professional Quality.
To produce a solder joint can be practiced on any cheapo wire with a cheap Solder.
It won't take long before the handling of the materials and reactions of the materials to heat are understood.
At this stage a clean looking even coated joint is not far away.

The chosen materials can be put on the work bench and once done have a continuity test with a multimetre.
Once that the Bleep is continuous the cables are good to use as are,
or  have a cosmetic finish used on the joint if wanted.

The Double Helix Thread on the Cables Section is sure to inspire.