When it comes to digital audio, we’ve all seen the same arguments again and again: do routers, switches, “audiophile” LAN cables and linear power supplies for network gear really change the sound, or is it all imagination? Some people swear the difference is huge, others say “bits are bits” and dismiss the whole thing. I’m not trying to crown a winner in that debate. What I want to share is what actually happened in my own system: how music servers and network devices can influence a DAC, and what changed completely once I gave my audio setup its own isolated, regenerated power source.
As long as your network is functioning properly, your DAC – in my case a dCS Bartók – is getting the correct bits. Routers, switches and NAS boxes don’t magically make your files “more correct.” The real story is not about data, it’s about noise. High‑frequency junk from switching power supplies, EMI and RFI from routers, switches, NAS, modems, PCs and even some music servers all get sprayed into your electrical environment. That noise doesn’t have to ride along the data stream to ruin your day; it can leak through the mains, through ground, or radiate through the air and land right inside the sensitive analog and clock circuits of your DAC and amps. That’s why so many of us have heard the sound calm down when we swap wall‑warts for linear PSUs on network gear or try LAN cables designed to control noise: the background gets blacker, the treble gets smoother, the whole presentation feels less edgy. It’s not because the bits got better, it’s because the noise got lower.
Instead of endlessly chasing tweaks on the network side, I decided to attack the problem at the source and build a clean “power bubble” just for the audio system. I pulled a dedicated power line with its own breaker, used only for the hi‑fi. On that line I installed a battery‑based AC regenerator from Neutron Audio. It charges a battery bank, then creates a fresh 50 Hz sine‑wave AC output with up to 5 kVA of power. From the system’s point of view, it’s no longer running directly off the raw mains, but off regenerated power coming from the battery. After that regenerator, I feed everything through a 30 A power filter based on an Inakustik 4500, upgraded with better parts (including Wurth and Mundorf capacitors) and tuned for high‑current audio loads. Just as important as all of that, I keep every network device – routers, switches, NAS – off this line. They stay on the “normal” household mains and only touch the audio system via Ethernet.
Before I built this isolated power chain, everything shared more or less the same electrical environment. In that situation, network tweaks absolutely did something. Linear PSUs on the router or switch smoothed out the sound and made the background feel cleaner. Fancy LAN cables with noise‑control tech, like some of the Ansuz designs, made the soundstage feel tidier and the treble less grainy. At that time it was very easy to believe that these network upgrades were not just useful, but essential. After the isolation step, though, the story flipped. With the dedicated line in place, the battery regenerator running the show and the 30 A filter cleaning up the output, and with all the network gear powered elsewhere, I went back and re‑tested all those tricks. I swapped switching supplies and linear supplies on the router and switch, I swapped basic LAN for “high‑end” LAN, I tried different ways of powering the network boxes. This time, almost nothing happened. If there was any difference, it was so tiny I wouldn’t trust myself to pick it out in a blind test.
Right now I’m perfectly happy using a simple, unshielded Cat 5 cable from the router/switch to the dCS Bartók. The system is stable, the background is quiet, the highs are smooth, and the music feels relaxed and natural. Network tweaks, which once seemed like a big lever, have become almost irrelevant in this context. That doesn’t mean they’re fake. I’m not saying network tweaks never work, or that linear PSUs for switches are snake oil, or that music servers are pointless. In many systems where everything still shares the same dirty mains, cleaning up the power and cabling on the network side really can help, because you’re lowering the noise that the whole system sits in.
What my experience changed is the order of priorities. If your audio system is still running straight off the wall with no real isolation, then spending money and effort on the network side can be worthwhile, and you may well hear a difference. But if you’re willing to go one step further – dedicate a line to the audio system, add proper regeneration and serious filtering, and keep noisy network gear off that line – the influence of routers, switches and NAS on what you hear shrinks dramatically. At that point, throwing big money at cables and power supplies for network devices makes less and less sense, because the system simply isn’t very sensitive to those changes anymore.
Given the choice, after isolating power the way I have, I would rather put my budget into the room, speakers, amplifiers, DAC and proper setup. Those are still the things that bring big, obvious, repeatable improvements. The network side, once the power foundation is solid, becomes more of a “get it working reliably and forget about it” story. For me, that shift has made digital audio a lot more enjoyable: less time chasing tiny tweaks, more time actually listening to music.
