Perreaux Silhouette SXCD - Manual (Page 22)

21
Increased
Read Speed
The increased 4x-8x read speed of the optical drive, compared
with 1x-2x speeds of standard mechanisms, gives the drive more
opportunity for error correction – ensuring the audio data stream
is a true reflection of what is presented on the compact disc.
Precision
Master Clock
The master clock, and its implementation, is the single most
important aspect of any CD player. A precision clock oscillator
with high temperature stability, fast 8ns rise and fall times and
jitter less than 5ps provides the foundation for best possible jitter
performance. Optimal physical location close to the SPDIF
transmitter and DAC ensure jitter levels are kept to a minimum.
Ultra Short
Signal Paths
The circuitry for the analog and digital outputs have been laid out
with the utmost care – components are arranged as compact as
physically possible to keep track lengths to a minimum, ensuring
signal paths are as short and direct as possible.
Digital
Output
Transformer
Utilising what is arguably the best digital audio transformer on
the market today, the digital output transformer from Scientific
Conversion ensures the SPDIF signal maintains very low levels
of jitter. High Common Mode Rejection Ratio (CMMR) and
decreased capacitance guarantee greatly reduced interference
susceptibility, noise and pulse aberration.
BNC Digital
Output
Connector
RCA connectors are inherently disadvantaged for use with the
high frequency (1.4MHz-2.8MHz) signals associated with
44.1kHz/16-bit digital audio. Design limitations mean RCA
connectors can never achieve a characteristic impedance of 75Ω,
resulting in reflections and signal loss due to impedance
mismatch. In contrast, BNC connectors are purposely designed
to carry high frequency signals, up to 2GHz for 75Ω – therefore
overcome the problems exhibited by RCA connectors.
Custom
Designed
Toroidal
Transformer
The 36VA toroid transformer is custom designed by Toroid
International (Noratel) exclusively for Perreaux. The fully
screened transformer, along with the low mechanical hum and
low exterior magnetic field inherent in toroidal transformers,
provides a solid foundation for the low-noise power supplies.
Multiple
Regulated
Power
Supplies
Stable, clean power is paramount in any CD player for good
performance. Two transformer secondary windings, and three
regulated power supplies, ensure power to the optical drive is
isolated from the sensitive analog and digital supplies. The DAC
is further isolated from the digital supply with its own local
voltage regulator.