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Old 22nd November 2012, 09:41 PM   #51
dddac is offline dddac  Germany
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Default the new DDDAC1794 NOS 192/24 DAC

In the past year I have been working on my new project: designing a DAC which will play 192kHz / 24bit material from a PC (or Mac...) There are many DACs who can do this, but I wanted to design a NOS version, as so far, every listening test I did, this led to a more open, natural and detailed sound.

I found this to be possible by using the well known PCM1794 and avoiding the digital filtering built into the chip. This proved to be quite tricky, but I managed to find the key to do it. It has been a great adventure with much to learn and a fantastic result at the end....

I give a very detailed report on www.dddac.com

you can download the specifications here: dddac1794_nos_ver30.pdf

and below I share a few Pictures. I will also open a thread for discussion on the NOS PCM1794 topics
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Old 22nd November 2012, 09:47 PM   #52
dddac is offline dddac  Germany
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In order of appearance:

The Mainboard with I/O and I2S to right handed conversion
The actual dual mono DAC Module (can be stacked parallel)
Built up with 4 modules and two power supplies (5 and 12 Volt)
Wired up in Chassis (Mundorf Gold silver oil Output and optional Sowter 1:2
The DAC in my Audio rack
another view inside
Attached Images
File Type: jpg dddac1794nos1.jpg (152.7 KB, 1697 views)
File Type: jpg dddac1794nos2.jpg (200.9 KB, 1672 views)
File Type: jpg dddac1794nos3.jpg (206.0 KB, 1653 views)
File Type: jpg dddac1794nos4.jpg (223.1 KB, 1608 views)
File Type: jpg dddac1794nos5.jpg (235.5 KB, 1552 views)
File Type: jpg dddac1794nos6.jpg (440.4 KB, 661 views)
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Old 22nd November 2012, 10:07 PM   #53
Corpius is offline Corpius  Netherlands
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Wow! Super great diy! I had already seen your website as was very impressed by it
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Old 17th December 2012, 01:54 AM   #54
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Default Dual Mono BIII / Hi-Fi 2000 Modushop

I finally finished my dual mono BIII. Oddly enough this build was financed after I built a turntable (Lenco) and sold a pricey belt drive.

I have a Denon 3910 modded to export I2S/DSD to the DAC. I am also waiting for my GB Amanero USB module.

DAC: BIII's with Legato's.
Enclosure: Hi-Fi 2000 Pesante 3U with optional drilled base and fully vented top cover.
Modushop machining (LCD cavity, LCD mount holes drilled & tapped, encoder knob cavity)/engraving.
Anodize after machine.
Arduino control with HiFiDuino/Corpius code.
Apple remote.
Corpius shield.
electroFUN I2C LCDextra IO to reduce LCD wiring.

I did the color fill of the front panel engraving using Testors enamel. I drilled/tapped holes for the Arduino/IR receiver so they are not as nice as modushops CNC work. The rear LCD cavity was to get the LCD closer to the face of front panel.
Attached Images
File Type: jpg pesante_0.jpg (54.7 KB, 707 views)
File Type: jpg pesante_4.jpg (101.0 KB, 506 views)
File Type: jpg pesante_5.jpg (37.0 KB, 343 views)
File Type: jpg pesante_6.jpg (65.4 KB, 392 views)
File Type: jpg pesante_10.jpg (55.4 KB, 387 views)
File Type: jpg pesante_13.jpg (233.8 KB, 749 views)
File Type: jpg pesante_15.jpg (86.9 KB, 755 views)
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Old 6th March 2013, 12:32 PM   #55
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I'd like to make a request that everyone posting DAC project photos please include the identity of the vendors of the major commercial sub-systems. For example, metal casework and knob vendor, DAC module vendor, etc. Not a full B.O.M., just the 4 or 5 major hardware elements. In particular, I'd be interested in knowing who are the casework and knob vendors providing you with such professional looking enclosures. Thanks.
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Old 7th March 2013, 02:31 PM   #56
dddac is offline dddac  Germany
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Good point! my DAC is obvious I hope
the chassis is from Schaefer. there is link on my website ...

Click here
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Old 4th April 2013, 08:38 PM   #57
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just another multi tda1543 dac. 12 stacked, lm317 reg and deode's i/v values on carbon comp. russian 4uf pio (or piwax? best sounding russian caps ive come across in that theyre actually listenable without killing the resolution. ) copper shielded wires and te8802 usb chip. 8802 sounds comparable (not as good tho) to waveio but has reliability issues.. Click the image to open in full size.
Click the image to open in full size.

Last edited by PreSapian; 4th April 2013 at 08:58 PM.
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Old 11th April 2013, 11:35 PM   #58
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Just an USB-DAC prototype.

I2S from Edel USB interface clocked by DAC (two Crystek CCHD-957);
AD1955;
I-V and LP on OP-AMPs buffered by emitter followers.

An quite unimpressive device:
Click the image to open in full size.

And a couple of spectra (1063 Hz, -0.15 dB FS; 192/24) for both channels measured with notch filter:
Click the image to open in full size.
Attached Images
File Type: jpg InChassis_0.jpg (114.2 KB, 1127 views)
File Type: jpg 192_THD.JPG (89.8 KB, 1121 views)
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Old 5th May 2013, 12:47 PM   #59
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Hello ,

My dac just finished .

I use Amanero usb + Ian FIFO Kit + Buffalo III SE.
Attached Images
File Type: jpg IMG_0652.JPG (591.4 KB, 330 views)
File Type: jpg IMG_0653.JPG (595.3 KB, 357 views)
File Type: jpg IMG_0660.JPG (439.7 KB, 246 views)
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Old 5th May 2013, 01:11 PM   #60
Stixx is offline Stixx  Germany
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Default ES9023

The second DAC that I built is a ES9023 based DAC with one of JP's first boards... (still waiting on the last version to come out ). Powered by a Salas shunt reg, case is from Hifi2000.
Attached Images
File Type: jpg ES9023-4.jpg (203.3 KB, 306 views)
File Type: jpg sabre-3.jpg (108.3 KB, 284 views)
File Type: jpg sabre-4.jpg (101.9 KB, 171 views)
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