• High quality metal drawer & CD-optimized servo system
• Wide array of connection options
• Extensive signal conditioning ensures standardization of data
• High Speed USB 24-bit/192 kHz
• State-of-the-art D/A converter
• Ultrafast output stage with current feedback
The 825 is an audiophile CD player with a wide array of digital interface options. In view of the sophisticated technology inside the case, the 825 may be considered an advanced DAC with a CD drive added. Whichever way you look at it, the 825 is an extremely versatile music machine.
High quality metal drawer & CD-optimized servo system
The stand-out feature of the 825 is its all-metal drawer. The drive itself is based on a DVD laser assembly with a long and successful track record. The servo board employs a modified DVD servo optimized for CD use only. The servo’s most important technical design feature is the memory buffering of the data, which is responsible for the high tracking accuracy and excellent data quality (jitter!).
The 825 has a full-feature remote control and a menu that can be modified to suit each particular application.
Wide array of connection options
The 825 is equipped with 3 digital inputs, 2 digital outputs, a signal loop function, and a USB audio interface that complies with the “Audio Class 2 Standard”.
Extensive signal conditioning ensures standardization of data
Digital data arriving at the inputs is processed before it is passed to the actual D/A converter. Once jitter has been removed (<50ps rms) in “auto mode”, the data is converted to the default 24-bit/96 kHz. This conversion is a prerequisite for the use of an innovative input receiver with digital PLL and data buffer, and a sample rate converter (SRC) normally found only in the studio sector. A microcontroller monitors the sample rate of data at the input and ensures that only data below 24/96 is submitted for upsampling. Data with 24/96 or higher is passed “natively” without any further processing. The standardized data is made available at the digital output of the 825 as well as at the DAC input. In addition to the auto mode, the user can specify fixed sample rates or choose to bypass the SRC (native mode).
A signal loop function, which is switchable in the menu, allows a digital signal processor (DSP) such as a room correction system to be connected directly.
High Speed USB 24-bit/192 kHz
The 825 High Definition Disc Player is the world’s first CD player to be equipped with a "USB Audio Class 2" audio interface that accepts high quality music data up to 24-bit and 192 kHz. The Player handles all customary data formats, i.e. 44.1 kHz/ 48 kHz/ 88.2 kHz/ 96 kHz/ 176.4 kHz/ 192 kHz.
Apple Computers (from OSX 10.6.4/ Snow Leopard) need no additional drivers to play these data formats. The 88.2 kHz and 176.4 kHz formats are not supported as standard by the Windows operating systems XP, Vista und 7, which require a kernel driver to be installed. A driver authenticated for Lindemann is contained on the CD supplied with the 825 High Definition Disc Player.
State-of-the-art D/A converter
The digital to analog converter in the 825 High Definition Disc Player is galvanically isolated to form a "source component within a source component". It has its own completely separate power supply with its own mains transformer windings. To maximize resolution, the digital signal is processed by a Blackfin DSP. The code used is a Lindemann proprietary further development of the well-known Anagram Sonic 2. Not only does the system accommodate the upstream mono mode DACs. In addition the original linear phase filter has been replaced with a much better sounding minimum phase filter with an "apodizing behavior" – one of this player’s main design features. This type of filter effectively suppresses time domain artifacts (including those present in the recording) and substitutes a new, time-coherent impulse response.
An ultra-stable master clock (<2.5ps jitter) guarantees D/A conversion of the highest quality.
The converter chips from Wolfson, which work in mono mode at 24-bit/384 kHz, have proven themselves to be extremely musical, outperforming other brands in listening tests.
Ultrafast output stage with current feedback
The fully balanced, ultrafast output stage with current feedback demonstrates virtually perfect time domain behavior, and thanks to the low level of negative feedback, an outstanding musical performance. No op amps are used at all.