Connections and the DAC64?

Hello..

Does the DAC64 invert polarity on all its inputs/outputs or just the AES/EBU?

Reason being, i've now changed my transport to a Sony SCD-777ES , which, for red-book will be through the DAC64, and for SACD, straight into the amp.

If it does invert, is there an easy way of re-reversing D) the polarity without having to get up and change the cables in the back of the speakers every time i change from CD to SACD?

I'm using a Chord Prodac digital cable rca-bnc.

Thanks in advance.

Chris

(Damn, knew i should check these things out before i buy )

 

Just read the instructions off the website.

All output inverted. Bugger :cry:

Anyone convert cables?

Chris

 

Simply reverse all the SACD analogue outputs to match the polarity of the CD source. If necessary after listening tests, reverse the polarity of everything at the amp output or speakers http://www.gcaudio.com/resources/howtos/absolutephase.html. A google search even finds an absolute phase tester.

SteveC

 

SteveC

Great advice, thanks.


Nice website too.


Chris

 

I think the only thing inverted about the DAC64 are the balanced outputs, so this is a connection thing. If you're using the phonos you have no problem. If you're using the XLRs then you need cables that crossover hot and cold.

Paul

 

Paul

Just phoned Chord.

Firstly
All the outputs are inverted.

then

they said 'if you listen to CD most of the time set the red and black on the amp for inverted polarity, and leave it for the rest of the time '

Then when i mentioned the change the hot and cold pins on the cable, he ummed and arred, went went for some advice, came back and said 'yup. that can de done. Great'

Nice.

(Now all i need is a pre-amp which has balanced inputs)

Chris

 

And these people know what there talking about ?

just swap the pins ...the signals ac for God's sake.

If you want any plugs swapped give me a pm.


The old arcam black box had a switch on the front that swapped ground and digsignal.

 

Firstly, yes, both XLR and RCA outputs are phase inverted.

However, if you can tell the difference between phase inverted or not then you've got better hearing than I have.

I switched my speaker cables around for a while but there really was no difference at all so I switched them back. I think there are few, if any, people who can tell the difference between phase inverted and normal.

Michael.

 

Zanash, you cannot swap round the ground and signal of a phono-phono connection. Any fule kno tha. Nothing to do with ac-dc.

It's really naff that the DAC64 phase inverts. It's not clear from their manual about it, they just talk about the balanced outputs being wired up US style rather than European and therefore hot is cold etc. Seems a bit fishy to me.

Paul

 

Paul,

Why is it naff that the DAC64 phase inverts? The general opinion on the 'absolute phase' thread seems to be that it doesn't matter...

And if you think it does, please tell us why.

reg

 

I think the DAC64 phase inverts because Chord amps or pre-amps also do it (or something like that). It's not really naff as it makes no difference to the sound. For people who really cared though I case they could have added a phase inversion switch but for me I'd rather not have a switch that does nothing

Michael.

 

.

 

Chris - you can delete your own posts you know

Michael.

 

Because it's completely unnecessary.

Because I've heard absolute phase make a difference, and I'd rather have it right.

For the record my preamp inverts output wrt all inputs. This is a minor pita, because you have to connect the speakers backwards somewhere, but it's similar for all inputs.

Paul