The Luxman DA-07
Digital/Analog Converter Unit
Features:
Fluency DAC
conversion of digital inputs with
sampling frequencies of 44,1 kHz (CD), 48 kHz (DAT) and 32 kHz (Digital
Satellite Broadcasting Tuner)
Complete isolation
of left/right channel and digital/analog signal paths at all stages, including
independent L/R power transformers
Ultra-high quality
materials and components used throughout, including PC-OCC wiring and 70
µ-thick OFC glass epoxy PC boards
Independent voltage
regulators at 11 stages
Massive
anti-resonant rigid construction with 18 mm front panel
Full copper plated
chassis and 10-block internal layout for maximum shielding
Switching of 3
coaxial, and 3 optical digital inputs (2 standard and 1 ultra high speed for
use with DP-07)
Digital recording
optical and coaxial outputs
3 analog outputs
(variable coaxial, fixed coaxial, and fixed balanced)
Adjustable master
output level
Front panel display
dimmer/switch
Champagne gold
finish
A conventional DAC
design applying Shannon's Theorem and a digital oversampling filter results in
ringing distortions. These can be seen in the small ripples on either side of
the musical signal. Ringing results in constant low-level noise and a perceived
decline in dynamic range. These spurious signal also cause phase distortions
during listening, detracting from the subtle musical harmonics that make music
come to life. The Fluency DAC virtually eliminates ringing. A similarly
dramatic improvement in reproduction is seen inn the square wave test.
Restoring the full
musical spectrum
The advantages of
the Fluency DAC are not limited to the elimination of phase shift and ringing.
By accurately selecting musical signals at the input stage, the Fluency DAC
produces an analog signal with more musical depth. Almost all music sources
naturally contain a small but significant harmonic component at the upper
limits of audibility. This component is critical to the soundstage localization
and musical "ambience" that are essential for realistic reproduction.
However, digital recording for compact discs is a pulse-code modulation process
using a sampling frequency of 44,1 kHz, which effectively eliminates all
musical signal from about 22 kHz on up. Moreover, conventional DAC's employ a
filter that begins a steep cut-off at lower frequencies.
Luxman found an
ingenious way to restore this missing musical ambience using the Fluency DAC.
Because harmonics arise from basic physical laws and mathematical principles,
the distribution of harmonics that occur in nature can be recreated. By
carefully programming the digital input stage of the Fluency DAC, Luxman has
succeeded in reproducing the rich ambience lost in the CD recording and
playback.
Specifications:
Method of D/A
Conversion: Fluency DAC, 16-bit, no LP
filter
Sampling
Frequencies: 32 kHz, 44,1 kHz, 48 kHz
(automatic switching)
Frequency Response
(CD Input): 4 Hz - 20 kHz (±0,1 dB)
Total Harmonic
Distortion: 0,008%
Impulse Distortion
(Impulse peak/sample peak): approx. 0,4%
(ref. 26% for DAC based on Shannon's Theorem)
s.n Ratio: more than 115 dB
Digital Inputs
Voltage:
Coaxial 1, 2, 3
: 0,5 Vp-p/75 Ω
Optical 1 : 125 Mb/s
Optical 2, 3 : 6 Mb/s
Digital Output
Voltage
Coaxial: 2 V/74 Ω (fixed), -2 V/ 100 Ω (variable)
Balanced: 4 V/ 94 Ω (fixed)
Dimensions (W x H x
D): 438 x 220 x 474 mm
Weight (net): 27 kg
Weight (net): 27 kg
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