Diy dac

sumitdutta77 · Feb 14, 2011

grubyhalo · Feb 15, 2011

Awesome! What I/V stage are you getting? Also, could you please explain why you'd need a 'bi-amping filter' to connect to an amp?

nshankar · Feb 15, 2011

Looks great, love the cylinders in corners which I am seeing for the first time in DIY.

Keep posting the pics as you progress with the build mate... all the best.

vivek.saikia · Feb 15, 2011

Nice enclosure design.....

soulforged · Feb 15, 2011

vivek.saikia said:
Nice enclosure design.....

+1...very cool enclosure...

Thad E Ginathom · Feb 15, 2011

Brilliant, Sumit. I'd love to be able to do metalwork like that, let alone the electronics.

goldyrathore · Feb 15, 2011

Hi Sumit,

The cabinets look classy. :clapping:

There is a lot of DIY electronics in your photos. Can you elaborate a bit more? How does the entire setup sound?

Regards,
Goldy

gopib · Feb 15, 2011

Hi Sumit,

Neat work, not just the cabinet, the circuit boards also. Very refreshing to see a breadboard approach...All the best...am sure it will turn out excellent,

cheers,

Thad E Ginathom · Feb 15, 2011

Nice carpet, too!

hyeah:

sumitdutta77 · Feb 16, 2011

grubyhalo said:
Awesome! What I/V stage are you getting? Also, could you please explain why you'd need a 'bi-amping filter' to connect to an amp?

I am using a transistor based discrete I/V stage.
As for the bi amping filter, I am using bi amplification and the filters are now fitted inside the amps, which is not very nice...higher voltages..heat... space....etc etc... I wanted to integrate these into the DAC ( as it is much quiter environment inside ) and space is what I had in mind when i started with the box design. Dedicated regulated ultra low noise power supply is also here.

sumitdutta77 · Feb 16, 2011

goldyrathore said:
Hi Sumit,

The cabinets look classy. :clapping:

There is a lot of DIY electronics in your photos. Can you elaborate a bit more? How does the entire setup sound?

Regards,
Goldy

Thanks Goldy..... the two circuits with heat sinks on them are 5v and +-14v regulated low noise power supplies for the DAC and I/V circuit. The relay boards are for analog and digital source selection. As the box will have the bi amp filters installed inside i need to switch the analog sources that i have through this box. And second set of relays are for digital source selection cd/DVD/bule ray. Will update detailed circuits when i reach final versions.
As u know sound is a very subjective issue ...but it sounds less restrained ..... highs are better i think.... than the Marantz CD-63II K.I. Signature which i have and compare with.

har297 · Feb 16, 2011

@sumitdutta77,
the enclosure looks classy, and the corner cylinder approach is the first i have seen, especially in diy projects,

and can you please elaborate a bit about the "relay circuit",and what type of switching you are incorporating for driving relays,

i am in the same scenario where i have to switch between the inputs so researching over it

regards

grubyhalo · Feb 16, 2011

Is the I/V stage completely your own design or is it based on anything else?

sumitdutta77 · Feb 16, 2011

har297 said:
@sumitdutta77,
the enclosure looks classy, and the corner cylinder approach is the first i have seen, especially in diy projects,

and can you please elaborate a bit about the "relay circuit",and what type of switching you are incorporating for driving relays,

i am in the same scenario where i have to switch between the inputs so researching over it

regards

thanks...

The relay board is very simple. Though now its controlled manually using a rotary switch...latter i plan to use an universal controller module ( control my whole music Rig through it....volume/source select/eq/projector/curtains/room lighting/ etc etc etc) .
As for the current schematic please check the image:-

http://i130.photobucket.com/albums/p266/sumitdutta77/IMG_0912.jpg

regards
Sumit

sumitdutta77 · Feb 16, 2011

grubyhalo said:
Is the I/V stage completely your own design or is it based on anything else?

The I/V stage is a slightly modified version of the Russ-White Legato balanced active I/V line stage. I am using some low noise trasistors and modified a few components to suit the replaced transistors. Also using some audio grade caps in the output stage. The circuit topology is almost same.

http://www.twistedpearaudio.com/docs/linestages/legato2_schematic.pdf

kaushik · Feb 16, 2011

Awesome... do use the Aluminum polishing thread in HTPC section for jawdropping finishing touch, i wanted to know how such nice square cut on aluminum is possible..

all the best soon i will attempt a big daddy like this ... i have got v good SPDIF feed [secret]

Do embedd the pics using the image icon

grubyhalo · Feb 17, 2011

sumitdutta77 said:
The I/V stage is a slightly modified version of the Russ-White Legato balanced active I/V line stage. I am using some low noise trasistors and modified a few components to suit the replaced transistors. Also using some audio grade caps in the output stage. The circuit topology is almost same.

http://www.twistedpearaudio.com/docs/linestages/legato2_schematic.pdf

Cool, thanks!

captrajesh · Feb 17, 2011

It looks fantastic. Great work buddy.:thumbsup:

magma · Feb 17, 2011

kaushik said:
A i wanted to know how such nice square cut on aluminum is possible..

n

the rectangular hole for the power supply
or just the right angled edges in general

both are actually quite simple

t.antony · Feb 17, 2011

Impressive work with the veroboards. I never thought someone could follow this approach for a complex project like this! Kudos to your effort.

Regards.

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