Excellent cable, I feel like I changed my amplifier and speakers.

1st. The sound became cleaner.
2nd. It enhanced the vocals.
3rd. It tightened the bass. Be careful, because I had a 6mm diameter cable and switched to 2.5mm, so the power decreased. But it's worth it because the quality improved.
4th. Excellent insulation.
5th. Excellent appearance.

An excellent cable for anyone who wants quality in the highs, mids, and lows. For those who want power in the lows, they might be slightly disappointed. I appreciated the quality and it surpassed my expectations because I heard sounds in the same songs that I had never heard before!

Reevaluation on 02.11.2019.
I applied double reinforcement with 4 cables on each speaker instead of two, and I got more power and signal, resulting in significantly stronger lows and more detail in the highs.

Below, I explain the actions:

First, I applied classic wiring, 3 meters on the left and 3 meters on the right.

Then, double reinforcement, 3 meters below on the left, 3 meters above on the left, and the same on the right. Total of 12 meters.

Later, I bought another 12 meters, cut them into 3-meter sections each, and connected the ends of the negative and positive together, increasing the thickness from 2mm to 4mm. Then, I placed each double cable on each negative and positive, simply coloring four out of the eight with a red permanent marker, for obvious reasons.

This invention, instead of costing me 90 euros (6M x 15E), cost me 360 euros (24M x 15E).

The result I obtained in terms of power and signal, combined with the quality of this award-winning cable, is excellent, magical, and dreamlike!

The Marantz SR7013 and Klipsch RP-8000F have reached new heights!

P.S. Throw away the banana plugs and connect the cables directly, as we have significant losses. It's worth the inconvenience.