XLR and Alepph-X

jarek · 15th February 2003, 06:02 PM

Hello All!
I am fascinating yours job on Aleph- X. And I heve decided! I will do it.
But, J have no balanced input. I must change my RCA signal to XLR. And I am asking you for a help with that problem. Could you advice me some schematics and constructions? What solution will be the best?
Thanks for all suggestions.

Peter Daniel · 15th February 2003, 06:19 PM

Not really need for XLR. I'm using my Aleph X with RCA jacks (single ended) and there is absolutely no problem with it. If the rest of your equipment isn't balanced, forget XLR connection on Aleph X.

jam · 15th February 2003, 06:57 PM

I would think that any x-amp would sound better with a balanced input. Maybe the balanced preamp on passdiy might be the answer.

Peter is correct when he says that it will work fine with a single ended input but then again I am biased.

Jam

Peter Daniel · 15th February 2003, 07:04 PM

I would also expect it to sound better with a balanced preamp, but in the case such preamp is not available it will sound good without it as well.

BTW, I'm not using preamp at all; signal goes straight from the DAC, which has a volume.

Nelson Pass · 15th February 2003, 07:10 PM

Noise issues from the environment aside, there is not
much difference in sound between balanced and unablanced
on these circuits as long as the diff pair is constant current
sourced. Having said that, the difference is that the balanced
does sound better.

LBHajdu · 15th February 2003, 07:19 PM

When running with rca jacks do you have to tie the negative input to ground like with the Aleph amps ?

jam · 15th February 2003, 08:11 PM

Peter,

I guess you need a dac with balanced outputs.

Jam

P.S. I was really trying to railroad you into building another spectacular chassis.

Peter Daniel · 15th February 2003, 08:38 PM

Actually I'm in a process of building Aleph P1.7. It should be quite spectacular.

jarek · 16th February 2003, 09:58 AM

Thank you for replies.
I will start without XLR connetions. But I have no experiences with bridged mode and need your advices, how I shoud do it. As I uderstand well, I should connect RCA signal to the (+) on the Aleph PCB and the (-) connect to the ground? Am I right?
I want to use a pot before at the input my amplifier and what kind of it will be prefered?

Peter Daniel · 16th February 2003, 02:20 PM

That's what you do with inputs. Don't use too high value on a pot. Probably 10K would be a good value, if not don't go higher than 50K.

15th February 2003, 06:02 PM	#1
jarek diyAudio Member Join Date: Dec 2002 Location: Poland	XLR and Alepph-X Hello All! I am fascinating yours job on Aleph- X. And I heve decided! I will do it. But, J have no balanced input. I must change my RCA signal to XLR. And I am asking you for a help with that problem. Could you advice me some schematics and constructions? What solution will be the best? Thanks for all suggestions. __________________ Jarek

15th February 2003, 06:19 PM	#2
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Not really need for XLR. I'm using my Aleph X with RCA jacks (single ended) and there is absolutely no problem with it. If the rest of your equipment isn't balanced, forget XLR connection on Aleph X. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

15th February 2003, 07:04 PM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I would also expect it to sound better with a balanced preamp, but in the case such preamp is not available it will sound good without it as well. BTW, I'm not using preamp at all; signal goes straight from the DAC, which has a volume. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

15th February 2003, 08:38 PM	#8
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Actually I'm in a process of building Aleph P1.7. It should be quite spectacular. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

16th February 2003, 09:58 AM	#9
jarek diyAudio Member Join Date: Dec 2002 Location: Poland	Thank you for replies. I will start without XLR connetions. But I have no experiences with bridged mode and need your advices, how I shoud do it. As I uderstand well, I should connect RCA signal to the (+) on the Aleph PCB and the (-) connect to the ground? Am I right? I want to use a pot before at the input my amplifier and what kind of it will be prefered? __________________ Jarek


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15th February 2003, 06:57 PM	#3
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	I would think that any x-amp would sound better with a balanced input. Maybe the balanced preamp on passdiy might be the answer. Peter is correct when he says that it will work fine with a single ended input but then again I am biased. Jam

15th February 2003, 07:10 PM	#5
Nelson Pass The one and only Join Date: Mar 2001	Noise issues from the environment aside, there is not much difference in sound between balanced and unablanced on these circuits as long as the diff pair is constant current sourced. Having said that, the difference is that the balanced does sound better.

15th February 2003, 07:19 PM	#6
LBHajdu diyAudio Member Join Date: Feb 2002	When running with rca jacks do you have to tie the negative input to ground like with the Aleph amps ?

15th February 2003, 08:11 PM	#7
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Peter, I guess you need a dac with balanced outputs. Jam P.S. I was really trying to railroad you into building another spectacular chassis.

16th February 2003, 02:20 PM	#10
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	That's what you do with inputs. Don't use too high value on a pot. Probably 10K would be a good value, if not don't go higher than 50K. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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