2. amps-preamps
  3. 138860-154

PS Audio Stellar Gain DAC/Pre-amp as first foray into separate pre-amp?

Well, I've been researching and considering various pre-amps with home theater bypass, but just came across this much more affordable PS Audio Stellar Gain DAC/pre-amp.  The idea is to get something for two channel audio that has home theater bypass, so as to be able to continue to use my Denon AVR for movies and multi-channel SACD and DVD-Audio.  But I want to improve the CD and flac playback I'm now getting out of the AVR.  I would also want to get better two channel SACD audio quality than I get through the AVR over HDMI, but it seems that I would have to purchase a proprietary PS Audio SACD player that has the I2S connector to make that happen. 

The plan would be to connect my universal player via optical or coaxial digital to the Stellar Gain DAC, instead of my current signal path of the Oppo into the AVR via HDMI.  I would also connect my turntable(high output MC cartridge) to the Stellar Gain unit.  I could also connect the optical digital output from my 4K TV to the Stellar gain.  The Stellar Gain unit would be connected to my Krell FPB 400cx power amp via XLR cables(I'm not sure if this would be a good output impedance match). 

The Stellar Gain DAC/pre-amp seems very reasonably priced, at $1,700, for its capabilities and for the sound quality indicated by professional reviews.  Plus, near mint used units are available for ~$1,200.  Thoughts? 
mtrot
mtrot OP
642 posts
 
@ auxinput,
Thanks for that tip about using PCM from the Oppo.  At least that will get me nice two-channel SACD audio from the Oppo, although I'll still have to use the Denon AVR to listen to multi-channel SACDs, which often sound significantly better to me than their two-channel versions. 

So, I would need to acquire a quality coaxial digital cable to go from the Oppo to the Stellar Gain, a quality USB cable to go from my laptop to the Stellar Gain, and quality XLR interconnects to go from the Stellar Gain into my Krell power amp.  Does this sound like all I would need?  And, any suggestions on the cables? 
auxinput
1,538 posts
 
Ah, you didn't mention what player you have.  If you have an Oppo 105 or 205, then it would be much better to use the Oppo to "play the SACD" and output pure analog using the 5.1/7.1 RCA analog outputs to your receiver.  Much better than sending SACD over HDMI and having the receiver decode/DAC the SACD data.
-----
For digital COAX, my standard "low cost" recommendation is the Beldon 1694A from Blue Jean Cable.  Make sure you get a minimum 6 foot cable (even though you don't need it).  A digital cable that is too short will have signal reflections back to the transmitter and cause errors in the square waveform pulses.   The 1694A is $20 plus shipping for an ultra cheap solution that I have found beats a lot of other cables.
---
For a big step up, I would recommend the DH Labs D-750 digital COAX.  Solid-core silver plated conductor (which is what you want for digital transmission).  A 2 meter cable is typically around $225 or so, unless you can find one used.
---
Or you can look at some of the Audioquest cables in between.
auxinput
1,538 posts
 
I have not done much USB cable testing, but usually solid-core and silver or silver-plated are the best digital transmission wires.


For RCA or XLR interconnect, I make all my own cables using 20awg solid-core braided conductors and Furutech Rhodium RCA/XLR connectors. However, if you're looking for a manufactured cable, either Audioquest or Wireworld are the two that I would generally recommend. Gold-plated connectors will generally sound warmer with rolled off highs. Silver-plated will increase the speed, but they could become bright/harsh.
--
If you're looking for the best pure solid-core silver, the Audio Sensibility has a model that's called Signature Silver XLR. At $1100, you can't buy another cable that uses pure OCC Silver solid-core conductors (they use 3 different gauge conductors per XLR pin: 20/22/24). They put on Futurech gold-plated XLR to help add a little warmth back in. It's an excellent resolution cable, but with all silver, it can easily push the system over the line into too harsh/bright.
mtrot OP
642 posts
 
Thanks, actually, I have the Oppo 203. I also have an Oppo BDP-83 in the bedroom system.

Thanks for the ideas for digital COAX cables. What about an XLR cable to go from the Stellar Gain DAC to the Krell power amp?
Edit:  Oops, I just saw your last reply.
auxinput
1,538 posts
 
Heh, just like speakers, once you ask "what cable should I buy", you will get 18 different answers! lol. However, in all my R&D and testing, I have always found solid-core to just sound better than any stranded conductor cable. Audioquest pretty much uses only solid core (except for their cheaper power cord and speaker cables). Wireworld is not quite fully solid core - but it's not that bad because they align all the conductors in a row side-by-side instead of clumping them together in a single bundle.
---
Since you're using Oppo 203, you could still try using pure analog out of it as well. You could try first with just left/right to get a sense of what it sounds like through the Denon AVR and then invest in another 3 RCA cables if you feel that's good enough for multi-channel SACD (if it's better than SACD through HDMI).

---
Another thing that will significantly improve the Oppo quality is to get one of those linear power supplies from companies like Oppomod or Clones Audio. These are in the $300-400 range and will be a great improvement over the stock switching power supply. And it will allow you to do fuse upgrades in the Oppo.

More to discover