CS4397 dac

[gabdx]

Hi, it looks like i can't post or even pm you now, no idea why i could not receive pm from you leo... the receive message from other box is checked in my option..

[Marco]

Hi gabdx,

All has been explained in an email

Please, as per our policy and request to you, pop into the welcome room and briefly intoriduce yourself and your system to our members.

What is your first name?

Thanks in advance.

Marco.

[Marco]

Hi Gabriel,

Thank you for complying with our request. Welcome, and please continue to enjoy the forum

Marco.

[leo]

Must admit Marco I do much prefer to call people by their proper name, it seems a bit odd saying hi to some of the strange usernames

[Marco]

Yep, that's the whole point of why we ask people to sign posts with their real names. Therefore your username can be 'toxiccockhead405' as long as you sign it as 'Frank', or whatever. You can even make up a Christian name if you like as long as it sounds 'real'!

Marco.

[gabdx]

Right now my dac doesnt work at all voltages seems extremely low, i am going to recheck the power supply and evrything ,

Leo ! now i can post thanks Marco , now for the serious part , i have the bottlehead
preamp with a 33 K resistor in the input ,

I also have another integrated amp with a 100 K volume pot...

Both are unbalanced in, so can i plug (with capacitors of course) the unbalanced cirrus chip into one of these ???

EDIT : the cirrus output used to be 2.5 v DC , now its 0.7 DC and some 0.4 AC... weird , i checked the power supply and its all good 4.7 V and 13 V close enough. The RCA voltages are just around milivolts of DC
On ac the RCA are varying with music around 0.2 Volts AC if i only touch the + or - with one leg of the voltmeter /
If getting a ground point and touching the + or - on the RCA i get around 0.5 Volts

Bottom line i hear no sound !

[leo]

Yep, that's the whole point of why we ask people to sign posts with their real names. Therefore your username can be 'toxiccockhead405' as long as you sign it as 'Frank', or whatever. You can even make up a Christian name if you like as long as it sounds 'real'!

Marco.

Yes, I sometimes use my middle name on forums if a member has the same name as my first, as you say though its got to be more convincing than saying Hi toxiccochead

[iihay]

Yep, that's the whole point of why we ask people to sign posts with their real names. Therefore your username can be 'toxiccockhead405' as long as you sign it as 'Frank', or whatever. You can even make up a Christian name if you like as long as it sounds 'real'!

Marco.

Toxiccockhead405 is actually my real first name, I just use Iain for forums

[leo]

Right now my dac doesnt work at all voltages seems extremely low, i am going to recheck the power supply and evrything ,

Leo ! now i can post thanks Marco , now for the serious part , i have the bottlehead
preamp with a 33 K resistor in the input ,

I also have another integrated amp with a 100 K volume pot...

Both are unbalanced in, so can i plug (with capacitors of course) the unbalanced cirrus chip into one of these ???

EDIT : the cirrus output used to be 2.5 v DC , now its 0.7 DC and some 0.4 AC... weird , i checked the power supply and its all good 4.7 V and 13 V close enough.

Hi Gabriel

Bloomin heck, how did you manage that l

If your 5v supplies are a lot lower than normal you probably have something dragging it down, could be anything from a short to bad instability somewhere .
You could try posting a close up pic of your dac and we can look for possible faults.

I presume you mean can you plug the output of the dac chip directly into the pre-amp through coupling caps?
If so, yes you can but I wouldn't recommend doing this with a solid state pre amp if it only has single line in rather than balanced.
You won't get the benefit of the noise canceling without a differential to line out using this type of dac, you'll also have no output filtering, it may sound pretty nasty, you can of course try it, using something like the lampizator valve stage makes things a little more forgiving when using the dacs direct negative left and right out.
You can also try it with your bottlehead pre, I've no idea what it will sound like but just be careful if you give it a go

[leo]

You edited before I posted

I presume this 0.7v DC is what you are measuring at the dacs differential outputs to ground and not on the line out after the op-amp?