Ventus EZ

[dutchgfx]

Currently, I do not have a balanced DAC. But I plan on obtaining one soon. For now, I will be using a Gamma2 The γ2 Compact High Performance DAC thats the link for it

It will output into 4pin XLR, or dual 3 pin, haven't decided yet.

But, I have 4 Ventus EZ boards, and am willing to use em all, because I would like (if possible) to be able to use both balanced and SE setups with the Ventus.

 

[BrianDonegan]

...and you want to power headphones?

 

[dutchgfx]

Yup. If it matters, the impedences range from 55 ohms to 600 ohms, but a high output impedence is fine sicne it will be better for the higher impedence loads.

 

[BrianDonegan]

I would tap the γ2 balanced outputs at the +R/G/-R and +L/G/-L pads, and feed them directly into a pair of the VentusEZs, bypassing the γ2's bal-se stage completely.

You do not need two pairs of VentusEZ for this.

 

[dutchgfx]

So it should be Left - > IN-, Left + IN+, GND > GND, and the same for the right side?

 

[dutchgfx]

And can I split the IN+ so I can opt to use SE input aswell? And then split the OUT aswell? or would that not be so great?

 

[BrianDonegan]

For SE input, you would attach signal to +In and GND to GND, then short the -IN to GND. If you have balanced outputs available to you, I am not sure why you would want to wire it that way, however.

 

[dutchgfx]

Yeah I am not going to. So then the output will be balanced?

 

[BrianDonegan]

No, the output is single-ended (+OUT and GND).

 

[dutchgfx]

So I can't make it balanced output? so then it just wastes the balanced input I guess right?

 

[dutchgfx]

The sound will be the same with balanced in as SE in due the the SE output right?

 

[BrianDonegan]

Er, no. The point of balanced signals is improved CMR (Common Mode Rejection). I think you need to do some reading up on that.

 

[dutchgfx]

I have an idea, I use 4 boards, 1 for left inverted, left normal, right inverted, right normal, and then Wer that up to xlr's for a balanced connection

 

[BrianDonegan]

That will work, if your headphones can support being driven with a balanced signal. Not sure how much benefit you will get, however.

 

[dutchgfx]

That will work, if your headphones can support being driven with a balanced signal. Not sure how much benefit you will get, however.

Yup they can so all the boards get wired up for SE use, with GND shorted to IN-, right? Because the signal is already inverted, so if you invert it again, it would be 2x normal, right?

So ide have 4x Non-Inverting boards, powered by 1 LCBPS? Or would I need 2?

 

[BrianDonegan]

No, use balanced inputs to each board, not single-ended, but reverse the inputs on the second pair (see picture). Repeat for each channel (left and right).

 

[dutchgfx]

Awesome! Thanks so much!!! Going to buy my XLR jacks now thanks so much for all your help

 

[dutchgfx]

So I constructed it for single ended until my xlr's come in. Anyhow, e sound is very very quiet, and pretty distorted. Songs are clearly recognizable, but you can easily tell that they are distorted, grainy, not clear.

This is both sides. That along with the issues I've had with cables leads me to believe its a grounding issue. But that's just a theory.

So, do you have any recomended method of troubleshooting? Thanks!

 

[Duffy Moon]

It might be best to take some good photos and post them on the TP Support Forum.

 

[dutchgfx]

So they can spot if I missed a solder joint? I'll try in the morning I think it might be an issue with the LCBPS possibly, since it's both channels. Is it possible that low power would cause the sound to suck?