2. digital
  3. 1104507003

Is 24/192 all hype?

Sorry for the flamethrower-bait thread title, but I wanted to get people's attention. I have a couple of threads going in the HT forum about trying to integrate a HT capability into a two channel system, and there's a bit that needs to go here.

I have a Marantz DV8400 that I'm using as my source (maybe to be replaced with either a 9500 or Onkyo SP1000 soon). Now it has the DACs and DD / DTS capabilities - even decent BM - to kind of question the need for anything but a multichannel analog preamp. Here's the BUT: but if I already have a HT prepro that has only 20 bit DACs and ADCs and no MC analog bypass, do I really lose audio quality (assuming the quality of the prepro converters is better than the 8400) by running the analog of the 8400 into the prepro? If I run a DVD-A or SACD in this mode do I really "lose" something?
tonyptony
lneilb's avatar
lneilb
108 posts
 
"On top of that, you now have to worry about impedance matching between the transport and the DAC. "

Sean, what is the rule of thumb for impedance matching between transport and DAC?
I've never considered this. Only thought it was an issua with analog signal.....
bluebull
269 posts
 
Bigkidz
DAC more important than Transport ? No , I do not agree.
Chris
audioengr
3,282 posts
 
Sean and BigKids hit the nail on the head. It's not the chips so much as the implementation. It's the board layout, the power supply, what type of parts were used etc...
philnyc
162 posts
 
Lneilb,

Digital coax/SPDIF is spec'd to be 75ohms between the transport and DAC. So you need to make sure that your digital coax cable is truly 75ohms....
sean
6,231 posts
 
Philnyc's comments about a 75 ohm standard are correct, but believe me, very few digital components actually adhere to that standard. This is why different cables sound and perform different i.e. the digital interconnect acts as an impedance transformer between the actual input and output impedances of these components. Sean
>
More to discover