Hi

I've ordered a Denon 1940 to use as a SACD transport- new, but at a bargain price- and a service manual. I intend to install a DSD output to feed my Buffalo II/Legato (and, possibly- I2S out too, but not straight away).

I'm confident I can do this. But my knowledge of digital electronics and networking is slight, so I thought it best to check a few things first with the crowd in the know!

I'm going to fit RJ45 output jacks, and CAT patch cables, as Mr Majestic described here-

http://www.twistedpearau...t.aspx?g=posts&t=992

Should I just use CAT 5E, or use CAT 6 cable/connectors instead? Should I go for UTP, FTP, or STP cables (unscreened, overall screened, and individually screened twisted pairs respectively)? If I use a screened version, should I connect the screen just to the chassis ground of one component only (i.e. DAC and /or transport), or?

Presumably I use one half of one twisted pair for each of D1, D2, and CLOCK (3 TP's in total), and connect all the other three halves to digital ground at each end? What should I do with the fourth TP- leave it floating, ground it or?

Will I need to fit output buffers as described here? (I suspect not, from what I’ve gleaned from previous efforts)

http://www.diyaudio.com/...40-dsd-ttl-level-out.jpg

If I do, will DIL package hex inverters be OK (rather than SOIC types)?

Is a 0.5 m patch cable too long?

Thanks in advance

Paul

Edited by user Thursday, January 27, 2011 2:11:23 AM(UTC)  | Reason: Not specified

Hi

Thanks glt. So I'll I think I'll use one wire of three of the twisted pairs,for D1, D2 and CLK respectively, leaving the fourth twisted pair unconnected. And connect the other wire of each pair to digital ground at the transport, and at the DAC, to provide screening and the GND conection. I'll use a FTP CAT 5e patch cable, and ground the overall screen to mains ground at one end only.

Anyone any other thoughts? I know several people have done this in the past. Would I be better using buffer amps for better drive? and/or to convert to a differntial signal out in the transport, and back to SE in the DAC? If so, how? Could I use transformers for this?

Would a better clock in the player be likely to be advantageous?

Thanks

Paul

Hi Nic

Thanks for the reply. I made the mod last weekend, in the much way you describe, and it works very well. Just DSD for now.

I wonder now whether a clock upgrade in the Denon would be worthwhile? And some power supply improvements? And whether I should remove the three 47R resistors through which the data and clock signals enter the Denon's SACD DAC- so that the signals feeds only Buffalo

Thanks

Paul

glt,
Is it possible to rip the DSD files from a SACD using the Korg player?
Thanks,
Nic

The Korg player converts to PCM. Its is not playing native DSD. While very good, that is not exactly ideal.