DAC 2
A low-cost portable
battery
powered DAC for that pure vintage "analog"
listening experience...
It fits in the palm of your hand, and can be battery
operated,
so you can take it with you and have your friends enjoy
it too !
TDA1543
+
DIR9001 + Battery power = GREAT SOUND !
Why
did you
design this DAC ?
Nobody can be "told" what a good
DAC is,
you have to hear it for yourself...
After
searching
myself for the "perfect" DAC, I stumbled on forum
discussions about how these "vintage" DACs from Phillips
sounded so
good.
I was getting a little skeptical about those "natural" and
"analog"
statements for the sound of those converters, but as so many
people
seemed to make converging descriptions, I was left with the
feeling
it was not just a legend...
I decided I had to build
one, and
try for myself !
As the result was more than surprising... I told myself :
wow, I got
to show that to my friends...
And what most of my friends said : "can you build one for me
?"
Call that a market study...
Why do audiophiles do not
like the
sound of current oversampling DACs ?
Oversampling DACs are textbook
correct, right
? So they should sound perfect, no ? Well ...
While it is true that oversampling DACs are textbook
correct, if
you make the wrong assumptions about the human hearing
system,
you may end up making mistakes, even if you do the math
right !
Let me give you a simple example : it is generally
assumed we
hear the spectrum of sounds, but can't hear the phase.
Now try "binaural beats" on Google and listen for
yourself.
These clearly show the phase information IS sensed, AND
remains
present far inside the brain.
So maybe
the
spectrum-only approach to DAC design is not telling the
whole
story...
Traditional non-oversampling DACs from the past did not
make any
assumptions about hearing mechanisms, they just tried to
replicate in analog what you fed them digitally as
closely as
possible...
What are the main features
of this
DAC ?
And what are the main goals of its
design ?
- Extract the pure performance of the last built
non-oversampling true 16-bit TDA1543 DAC from Philips
- Optical & Coaxial inputs (leftmost switch on the
photo)
- DIR9001 96 kHz SPDIF Receiver (lowest-jitter on the
market -
50ps)
- Supports sampling frequencies from 28kHz to 108kHz
(continuous
range, including non-standard frequencies)
- TDA1543 16-bit DAC - the original from Philips®
- Passive I/V conversion
- No Op-Amp - direct output with 2Vpp (will drive any
power amp
well)
- Huuuge capacitors on the output path provides
sub-Hertz cutoff
frequency (<0.3Hz on a 10kOhms input)
- Dual Stage power supply regulation (for a super low
background
noise level)
- Separate voltage regulator for the DAC and the Digital
SPDIF
receiver (same reason as above)
- Battery-powered with dual 9V NiMH batteries
- Smart battery charger on-board (quickly charges the
batteries
when depleted, keeps them charged at low current when
idle)
- When both power switches are on, the
batteries are
recharged, and are also used to buffer the external
power,
completely removing hum.
- Will Directly drive any power amplifier
- Easy to carry around and make it listen to yours
friends
- 4+ hours of listening on the batteries alone
Why is the cost so low if it
sounds
so good ?
Simple is beautiful...
The less you process sound, by adding unnecessary stages,
the more
transparent result you get.
A minimalist non-oversampling DAC will achieve that goal,
giving you
great sound, and low cost too.
What are owners of this DAC
saying ?
This is the type of ebay evaluations
I get
about my DAC ...
Includes :
1x Battery DAC board (mounted & tested)
2x NiMH Batteries (one is shown in the picture for scale,
two are
actually mounted inside)
Note : power supply is not
included (any 12V-15V wall transformer will do, laptop
supplies
are ok too, car power also...)
See also : USB version with always-active
reclocker (USB/Optical/coaxial)
Available on ebay.com
and also on ebay.uk
Video with detailed explanations on the
design of my new USB DAC :
WARNING:
If like me, you have the
habit of
cranking up the volume knob of your amp just to
check if the
device connected to it has its power on...
don't do it
with that DAC ! It's background noise is so low
(no kidding) it
just will fool you into thinking it's maybe not
connected.
Pressing the "play" key on your CD transport or
favorite PC
software will blow your speakers, kill your ears,
piss-off your
neighbors... How do I know... Well, it happened to
me...
Return
Policy:
If you don't fall in love
with this DAC after listening to 2 or 3 or your favorite
tracks
with it, I'll refund your purchase without discussion.