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khundude 6th July 2008 04:32 AM

Pass D1 I/V for Sabre DAC
I know that there are a lot of schematics on diyaudio for the D1 but I just want a simple one. I have searched and found JFET ones and modified ones, I want the original one. I am looking for a schematic for the D1 I/V stage and SE conversion without the DAC or supporting stuff. I do not know 100% which circuits are for the volume control, I/V, receiver, etc. so a simplified schematic or link to one would be a boon. I want to use this with a Twisted Pear Buffalo DAC which uses the ESS Sabre DAC chip. Thus I would like suggestions for proper compnent values as well and I will include the data sheet for the DAC in this post as well. Thanks in advance and please be patient with me, I am new to this.

Now I just have to wait and see what Mr. Pass says about the Audio Nirvana Cast Super 12 drivers, enclosures, and FW amps to drive them.

CSS Sabre data sheet:

khundude 16th July 2008 03:12 AM

I keep looking and still cannot find a simple D1 I/V in SE.

Yunick 4th November 2008 10:39 AM


I see your e-mail is turned off, could you please e-mail me about the D1?

Best Regards

Variac 10th November 2008 10:53 PM

I'mm interested in the is scheme too!!

Zen Mod 10th November 2008 11:13 PM


Originally posted by Variac
I'mm interested in the is scheme too!!

which one exactly ?

I'm messing in too many threads in same time ...... :apathic:

P. Lambda 11th November 2008 12:41 AM

I'm interested also.

zei 11th November 2008 12:34 PM

For what i understood the Sabre dac puts out about twice the juice compared to what the D1 I/V wants..

And that is the main problem to get the Sabre to work with the I/V.... :(


Yunick 11th November 2008 04:16 PM

I asked Khundude to contact me so we could discuss how to modify the D1 to be suited for the D1 I/V. I have made a few tries over at the groupbuy thread but haven't made it work as intended yet.

I guess to make it work it would be simple to lower the gain of the D1 and maybe raise the bias (or the I/V resistor).

Also I think that if the buffalo sees a to high input impediance it will go in to voltage mode instead of current mode.. This may also be a problem. But I'm not shure, so if someone could fill in maybe :)

khundude 12th November 2008 09:06 AM

I would guess so too. I would think a resistor arounf 47 ohm might work. I have finally ordered a Buffalo and will be able to play along soon.

Yunick 12th November 2008 10:36 AM

The schematic can be found here:)

Khundude, what resistor did you refer to?

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