20 years ago I used to think all cables were the same. Boy was I wrong. A true audiophile salesman told me he had fantastic results with this cleaning liquid which has fine grain diamond dust in it. It was not cheap at $49 for a very small bottle. However the results were stunning. More Bass, more detail, an incredible increase in the richness of the sound. My CD player is 7 years old so it is quite likely that the improvement is much greater than you can expect with new equipment. However using the liquid on the phono plugs on the new interconnects to the new amplifier also produced a noticeable improvement.
The level of improvement is similar to that you would get from changing from some old monster cable interconnects to some new mid price cables. Despite the price, very worthwhile and highly recommended to get the last ounce of performance from your system