When a power supply is used, the NFB circuit loop acts as an antenna, picking up digital noise. One of the main causes of the CD sound being cold and harsh is thought to be due to this phenomenon. Philips has thoroughly examined the merit and demerits of this NFB circuit look and succeeded in developing a conversion circuit with no feedback and excellent in-phase rejection ratio of positive and negative phase. The conversion circuit operates in perfect symmetry as an ideal balanced amplifier.
The technology and know-how is implemented in our LHH900R and LHH300R CD players. The conversion circuit banishes all NFB from the D/A converter, the amplifier and its power supply. The result is an energetic, bold and delicate sound.