PS Audio NuWave DSD DAC Performance Upgrade & Review

I decided to design and implement some improvements to my recently acquired PS Audio NuWave DSD DAC. The improvement is astonishing, let’s take a look.

Now updated with additional improvements and owner feedback!

My apologies for the lack of articles recently. I’ve been inundated with work and this really slows down my writing, but there will be much more soon. I recently acquired a PS Audio NuWave DSD DAC here @ Liquid Audio. The NuWave DSD originally sold for around $1800 AUD and has just been discontinued. Most importantly though, it’s a fantastic sounding piece of gear.

In sonic terms, the NuWave DSD is smooth, organic and non-fatiguing, with epic bass performance. Music sounds free-flowing and relaxed when played through this DAC. Anyway as I often do, I figured I’d play with the DAC for a while and test a few simple improvements.

It’s a very elegant and solidly built DAC.

Room for Improvement..?

The NuWave DSD is beautifully constructed. Like all products though, the manufacturer has specified parts that allow it to hit a certain price-point. No surprises there and I’m in no way suggesting PS Audio use poor quality parts. On the contrary, they use excellent parts, better than you find in a lot of gear.

They’ve used Nippon Chemi-Con and Panasonic capacitors, two brands I use all the time. So what am I getting at here? Well, PS Audio uses great branded caps but not the best grades for audio. Power supply capacitors are critically important to the sound of a device. I knew I could improve the DAC with a handful of better grade, more expensive parts if I could find a couple of spare hours to do it…

I’ve upgraded many DACs and CD players over the years, including the Musical Fidelity M1 and TriVista 21 Tube DAC. With affordable improvements in mind, I took a peek and ordered some of my favourite Nichicon audio grade filter capacitors, in a size that would fit. I already had Panasonic parts in stock to replace the two smaller capacitors.


This upgrade process was thankfully much simpler and less time-consuming than that which I employed for the M1 DAC I upgraded recently. It’s also a better-sounding DAC before any work is done.

The bottom panel comes off to reveal…
…everything upside down, all the electrons will fall out! Seriously though, this transformer is amplifier-sized and very generous for this application. By the way, the precisely fitting bottom cover is held on by 10 lovely little countersunk machine screws, a very nice touch.
So here’s where all the action takes place, on one tiny board. I’m focused only on the four through-hole capacitors you see towards the bottom of the board. The large brown ones are Nippon Chemi-Con KMH series, excellent low impedance power supply capacitors. The two smaller capacitors are Panasonic NHG, another good but not expensive capacitor.
A better view of the board removed. This is a beautiful board and all the soldering is perfect. They’ve used excellent capacitors, but there are better parts available. No need to increase the capacitance as 15,000uF is plenty for this low power device. There isn’t much spare room here either, so parts sizing is critical.

I’ve used better parts from Panasonic and Nichicon. In this case, I chose Nichicon KG Gold Tune and Panasonic FM. These are two of the highest grade parts from these manufacturers, around twice the price of the factory parts. This makes a real difference to the bottom line, so it’s no surprise or failing that PS Audio chose the parts they did.

Are there even better parts available? Yes, but the trick is to find sensibly priced parts that fit. I’ve had a lot of experience with the parts I’ve used here and I know how well they work.

Make no mistake, I love Nippon Chemi-Con and use them often, but Nichicon Gold Tune and Super Through are better for audio. I always hear improvements when I use them, but keep in mind they are twice the price of the KMH. They also have a much higher ripple current rating.
The extra width of these parts means they just fit. I wanted narrower parts, but they were then too tall. This is a common dilemma when sizing parts.
Ah, the power of gold..! I selected this size because it just fit with existing parts. The Panasonic FM is the same size as the original NHG. The Nichicon parts are 85 degrees rated and this DAC barely even gets warm, so they will last a long time in this role.
And there we go, job done. I wanted to tackle the coaxial digital input wiring. Coaxial cable helps keep noisy digital signals out of the audio circuits nearby and keeps the PCM waveform clean. Unshielded wires like this act as antennas, radiating RF energy into the case. My interest in radio means I’m always considering things like this, I have some mini-coax but ran out of time on this job. Maybe next time I’ll address this and I’ll add a BNC connector…

Further Refinement

I’ve since added some additional changes to NuWave DSDs that are sent to me for improvement. In my own DAC and other NuWave DSDs, I now bypass the main filter capacitors directly at the pads, with premium WIMA polypropylene film capacitors. I also now use Nichicon audio grade parts for all four large capacitors. The improvement is more subtle but definitely slightly better than my original version.

Note the blue Nichicon audio grade caps I now use in place of the already excellent Panasonic FM parts.
These WIMA polypropylene bypass caps are beautiful parts and perfect for this job.
The finished board looks basically the same, but I felt it was worth mentioning. It sounds just a little better again, the improvement here is subtle, but the two I’ve added these changes too sound just a little smoother and more open.


I tend to understate things, but WOW, this made an immediate sonic difference for the better. I guessed it would, but this one even caught me by surprise! As soon as I hit play I heard the difference and so did another buddy of mine with very good ears. He was unequivocal –

“It’s heaps better!”

Everything is significantly better post-upgrade. There’s more air, greater space and everything sounds even more fluid and organic. Really, the great qualities of this excellent DAC have just become more obvious by significantly increasing the spend on power supply parts.

Let me again say how very nice this DAC sounds out of the box – smooth, warm, relaxed, articulate. Comparing it to other well-regarded heavy-hitting gear, the NuWave DSD acquits itself incredibly well.

The digital stack!

Using my Meridian 506 as a transport, the improved NuWave DSD sounds even smoother, more beguiling, more velvety. I’m very impressed, the mid-range is glorious and the bass is some of the smoothest, natural and most impactful I’ve heard. There’s also a welcome absence of digital glare, so my NS-1000Ms are happy. The NuWave DSD is definitely one of the nicest DACs I’ve heard for sensible money.


I’ve now upgraded two of these units for my customer Dave. Here’s what he had to say upon hearing the initially upgraded unit for the first time:

Hi Mike

(had) my system playing last night. You upgraded the PS Audio DSD NuWave DAC about a month ago. Now, I have the speakers back to try everything. Simply amazing mate! Cleaner mids and highs, more visceral, present, transient, and controlled bass.

Later, after having compared his upgraded NuWave DSD with a much more expensive PS Audio DirectStream DAC, Dave sent me this:

My mate brought over his new PS Audio DirectStream DAC. Head to head, (your) mod’ed NuWave had greater obvious detail, sound-stage, and musicality. The $10k DirectStream was dark, small sound-staged, distant, colder, less detailed, preserving only some respect in the bass.

Thank you for this feedback, Dave. It’s incredibly pleasing to know that a few carefully conceived improvements can make such a huge difference to a piece of equipment.

The Bottom Line

With any type of music, the PS Audio NuWave DSD sounds fantastic. It’s great out of the box and noticeably better after the improvements I designed and implemented here. Best of all, my modifications are very affordable.

If you’d like me to improve your PS Audio NuWave DSD, don’t hesitate to contact me.

A killer combination.

PS Audio NuWave DSD DAC


Chassis / Build-Quality




Sound Quality - Standard


Sound Quality - Upgraded





  • Excellent build quality
  • Smooth, organic, relaxed sound
  • Lots of inputs
  • Linear power supply
  • Great value


  • Nothing of significance

6 thoughts on “PS Audio NuWave DSD DAC Performance Upgrade & Review”

  1. Wow! Just awesome, totally awesome.
    This is the kind of post that makes me ponder if it would be worth my while to pay the shipping to & from US/Aus to get my older Musical Fidelity DAC which has a no longer functioning Coax input upgraded
    to it’s full potential of sound quality.

Feel free to share your thoughts and leave a comment!