from China (HK)
I got this nice Chinese DAC zhaolu D2.5 and I liked it a lot from the
It has a nice
body, good transformer, and 4 nicely laid pcb's: a DAC, a power supply,
output stage and phones section.
in DAC D2,5
process is very very simple: just unplug the cable
connecting the DAC board to the output board and connect the
lampizator to the wires of the connector. This will give the straight
DAC chip output legs driving the lampizator directly (well - actually
via signal caps).
The DAC is a V out type with strong 2,5 V signal.
This DAC has a
very modern and accurate Cirrus Logic chip CS4398 DAC. It is balanced,
so you can go fully balanced easily.
It has a voltage
output, so no converson should worry you. The
wires on a 5-way plug are: Left Pos, left neg, ground (black-thick) and
symmetrically right neg, right pos.
There are no
noise artifacts from conversion process (hiss), bare and unfiltered
this DAC is as quiet as it gets.
After taking the
signal from the connection cable - the end result is
phenomenal. This is a very musical dac, full of details, with superb
attack, bass and air. I think it has the sound quality equal to the
ones out there.
recommend it as an ultimate sound source.
It does not have
to fear the 10 000 dollar beasts from the top names in the industry.
The DAC PCB is
purely SMD. I noticed a handful of capacitors. With a
magnifying glass, a sharp tipped soldering iron and some patience -
these can be replaced with proper audio grade caps. Up to 1 uF - with
MKP foil type, and above 1 uF - with electrolytics oscons or tantalum.
will take the DAC to another league. Of course while replacing, we
substitute the X with at least 2x or better 5x capacitance size.
The output PCB
can be disposed of completely. We do not need it.
Here is what
Multi-bit Delta-Sigma Architecture
– 120 dB Dynamic
– -107 dB THD+N
– Low Clock
– 102 dB of
Sample Rates up to 192 kHz
– Accepts up to
24 bit Audio Data
– Supports All
Industry Standard Audio
Digital Filter Response
– Volume Control
with 1/2 dB Step Size and
Channel Routing and Mixing
Stand-Alone or I²C/SPI™
– 1.8 V to 5 V
Serial Audio Input
– 1.8 V to 5 V
Control Data Input
– Dedicated DSD
– On-Chip 50 kHz
Filter to Meet Scarlet Book
– Matched PCM
and DSD Analog Output
Volume Control with
1/2 dB Step Size
and Soft Ramp
– DSD Mute
Direct DSD Path to On-Chip
Output for External Muting
Left and Right Mute Controls
– Supports Auto
Detection of Mute Output
– DVD Players
– SACD Players
– A/V Receivers
The CS4398 is a
complete stereo 24 bit/192 kHz digital to- analog system. This
D/A system includes digital deemphasis,
half dB step
size volume control, ATAPI channel mixing,
selectable fast and slow digital interpolation
by an oversampled multi-bit deltasigma modulator that
includes mismatch shaping technology
distortion due to capacitor mismatch. Following
this stage is a multi-element
capacitor stage and low pass filter with differential analog outputs.
The CS4398 also
has an proprietary DSD processor that allows for
volume control and 50 kHz on-chip filtering
intermediate decimation stage. It also offers an optional
path for direct DSD conversion by directly
multi-element switched capacitor array. The CS4398 accepts
PCM data at sample rates from
32 kHz to 216
kHz, DSD audio data, has selectable digital filters, consumes
little power, and delivers excellent
This picture is
not actually reflecting the lampization but the playing around with
battery DC supply.
at these giants which use similar or same DAC. You could join the club
for 200 bucks !
CONSONANCE Droplet CDP5.0 - a lovely machine for 5000 USD with fake
tubes stage and lots of op-amps inside
CRISTAL CS4398 DAC USER LIST
CD43 Mk 2
Number Cruncher 205.2
DELTA SIGMA DAC
STAR MODEL 192 DAC
Electronics Thunder 3
Research UNICO CD
Also check my Lampucera
description with very similar DAC
CIRRUS PDF FILE