Digital audio equipment such as CD players is a hotbed of high-frequency noise that damages audio signals. No matter how carefully they are designed or how strictly they are shielded, it is impossible to prevent it completely.
Especially when using NFB-based D/A conversion, amplifiers and power supplies, the loop of the NFB circuit acts as an antenna and removes digital noise. This phenomenon is said to be one of the main reasons why CDs are said to have a cold, crisp sound.
This technology and know-how have been applied to the Philips LHH900R and Philips LHH300R CD players, which has no NFB in the D/A conversion section, amplifier section and power supply. Free from the effects of digital noise, even the slightest noise is nullified by balanced operation. The sound is energetic and smooth, grand and delicate. A sound world of another dimension is now open.
The traditional Philips swing arm mechanism "Philips CDM-4" was also unfortunately discontinued. Of the mechanisms of the previous generations, the Philips CDM-4 was the most compact and had the highest relative rigidity, and was known as a very accurate, high-quality sound mechanism. Its final glory will be showcased as the integrated, top-of-the-range CD player Philips LHH900R, limited to 500 units.
Power supplies for digital circuits should be ripple-free and surge-resistant. However, conventional power supplies with high NFB, such as three-ended regulators, are not suitable for digital circuits.
In the Philips LHH900R, even the digital power supply features a newly developed no-feedback high-speed power supply. The Philips LHH900R features a newly developed no-feedback high-speed power supply, even for digital power supplies. Jitter in the audible band, which is detrimental to high-quality sound reproduction, has been improved by 10dB. This ensures energetic and smooth music playback.
With the Philips LHH900R, every detail of performance befitting a top-of-the-range CD player has been pursued, and a 130-mm-thick double-sided copper foil glass epoxy gold plated, three times thicker than usual, has been chosen for the PCB, which largely determines final performance. This minimises ground impedance, has a high shielding effect and provides excellent high-frequency characteristics.
Copper-plated zinc die-cast base with extra-thick aluminium panel and copper-plated 3.2 mm base plate on a copper-plated zinc die-cast base. Three-point support with heavy-duty sintered alloy legs Analogue and digital 2 transformers