HQCD (HiQualityCD) format achieves high quality audio through the use of a new polycarbonate plastic with improved transparency derived from LCD display manufacturing technologies. This enables a more accurate reading of the CD data. In addition, a special silver alloy is used as the material of the reflective layer instead of the standard aluminum. This results in a much more precise pit for the laser to read. HQCD format CDs are fully compatible with standard CD players. You will be surprised by the sound, these HQCD’a are a must for a serious audiophile!