Very well said and I agree wholeheartedly. I ended up purchasing two, one of which is in Jon’s hands now. The other arrived recently and immediately went in at my router. When the other cable makes it back from Jon, it will likely go between my Farad and EtherRegen.In conclusion, the DC extension cable has had an outsize impact on my stereo system and has really increased my emotional connection with the music. At current prices, it is a stone cold bargain. And bear in mind that I achieved the greatest impact in my system using two cheap adapters and another run of DC cable. I imagine that a QSA DC cable terminated specifically for the components you already have would achieve even greater impact.
While others have described very significant impacts of the DC cable on their video systems, I saw and heard only modest improvements.
For the last five or six days, I have had a QSA Lanedri Gamma Infinity DC extension cable in the house. This is a demo that has been making the rounds here in the Pacific Northwest – thank you QSA Lanedri for providing this opportunity!
I’ve tried the DC extension cable in a few different configurations. I’ll list these in order of their greatest positive impact on my system.
Between power supply and router:
My router is the one approved by my ISP and it is a Greenwave C4000XG. I selected it because it is compatible with my internet service, not because of any special audiophile qualities. It accepts an ethernet input from an ONT that converts fiber to ethernet. I have a very long run (60 to 80 feet) of generic Cat 6 ethernet cable going from the router to a wall port in my living room, where I run more generic ethernet to an Uptone EtherRegen switch, and then a run of Sablon 2020 ethernet cable to my Taiko Extreme music server.
I normally power my router with an Uptone JS-2 power supply using good quality Uptone Audio DC cables. The QSA DC extension cable I have been using is terminated with a female 2.1mm terminaton on one end and a male 2.1mm termination on the other end. Because the JS-2 requires a 2.5mm input and the router requires the same 2.5mm input, I had to improvise with adapters and other DC cables. (I tried fitting the 2.1 terminations into the router and JS-2 and they would not work.)
The best sounding combination of cables and adapters looked like this:
JS-2 power supply (fed by a good quality Audience power cord but from non-dedicated circuits) > cheap 2.5 to 2.1 adapter > 12 inch run of high quality Zenwave Audio copper DC cable > QSA Lanedri Gamma Infinity DC cable > cheap 2.1 to 2.5 adapter > Greenwave router
Bear in mind that I had already experienced a very positive improvement from powering the router with the JS-2 using a good quality Uptone Audio DC cable. The QSA cable improved on the already excellent sound in the following ways:
Vocals are more expressive because small inflections and microdynamics reveal artistic intent that I was unable to hear before. Lyrics are more intelligible. Percussion is very precise and legible. On well recorded piano, you can hear small variations in the amount of pressure being applied to individual keys, revealing (again) more of the artist’s intent. Bass is fast, tight, clean, and easy to follow. I heard no downsides including a lack of fatigue after hours and hours of listening. Emotional connection is better. Subjectively, I would say that the QSA cable doubles the impact of the JS-2 power supply.
- A significant step up in clarity
- Beautifully pure timbres and vibrant tonal colors
- Greater delineation of microdynamics
- Excellent PRAT
Am I surprised that a DC cable is having these easily heard and fairly dramatic impacts on a non-audiophile router? Yes and no. Yes because, not that long ago, who would have even thought a router could have a profound impact on sound, let alone a DC cable feeding a router? No because, beginning last Spring, I have read and heard enough positive feedback from veteran audiophiles, and ears that I trust, who have reached the same conclusions when using a QSA DC cable with a router. In addition, I have been using a JS-2 power supply with a different router in a different system (see post #422 in this thread) and the use of a QSA Lanedri Gamma Revelation power cord on the JS-2 made a very positive impact. In fact, the impact of the QSA power cord on the router was greater than on a Sonore Optical Module.
I tried some other experiments. For example, I used the QSA DC cable with the cheap SMPS power supply that came with the router, eliminating the JS-2 from the equation. This sounded surprisingly good with various QSA attributes improving the sound: great clarity, transients, PRAT, bass, etc. Upon further listening, however, it became apparent that the combination of JS-2 and QSA DC cable was significantly better. Specifically, insertion of the JS-2 added tonal beauty, body, density, and refinement. On well-recorded piano and vocals (e.g., Patricia Barber’s “Higher”), the additional air surrounding the voice, the beautiful and delicate harmonics hanging in the air like you hear with a live piano, and the sheer realism of the voice all added up to magic. Subtract the JS-2 and the magic faded. So while the QSA DC cable will do amazing things even with an SMPS, a good quality power supply seems to help a lot.
Another experiment confirms the same basic idea that everything makes a difference. This time I substituted a cheap Amazon DC cable for the audiophile quality Zenwave DC cable that was part of the system described above. This time the sonic loss was not as great as when I substituted a cheap SMPS for the JS-2. But the loss could still be clearly heard: vocals were more realistic and were surrounded by more air with the better cable, and piano sounded richer and more beautiful.
Between power supply and Uptone EtherRegen:
I use an audiophile switch, an Uptone EtherRegen, between my router and my Taiko Extreme because it lets a little more detail through, adds some body, and just sounds a little more quiet and calm. Overall, it’s a fairly subtle improvement on most tracks but good value given the low cost of the EtherRegen. Of course a good power supply brings out more of the goodness and so I’ve been using a Farad Super 3 with the EtherRegen. I have been using the stock DC cable that Farad sells, so nothing fancy but decent quality.
I added the QSA DC extension cable to this setup so that the stock DC cable connected to the QSA cable which then connected directly to the EtherRegen. No adapters but still with the stock Farad DC cable in the chain.
I estimate that, as with the router, the addition of the QSA DC cable doubled the sonic improvement of the EtherRegen alone. I heard similar improvements: greater clarity; retrieval of low level details like decays and textures; vibrant colors and pure timbres; and seemingly darker backgrounds. Somehow this DC cable seems to be acting as a filter to reduce networking noise. Overall, the impact was not nearly as great as with the router simply because the router appears to be so vital to overall sound quality. If you were to only buy one QSA DC cable, I would suggest starting with your router.
Impact on video:
While others have described very significant impacts of the DC cable on their video systems, I saw and heard only modest improvements. I have achieved greater impact with an Audience power conditioner. I suspect part of the reason is that the AV system in my Seattle house is older and less responsive. I hope to try the DC cable in a better AV system in a different house and see what happens there.
In conclusion, the DC extension cable has had an outsize impact on my stereo system and has really increased my emotional connection with the music. At current prices, it is a stone cold bargain. And bear in mind that I achieved the greatest impact in my system using two cheap adapters and another run of DC cable. I imagine that a QSA DC cable terminated specifically for the components you already have would achieve even greater impact.
Have you considered running fibre from your router to the Ether Regen? With so much generic ethernet leading to the ER I'd speculate it is somewhat flooded with noise which possible reduces its effectiveness.I use an audiophile switch, an Uptone EtherRegen, between my router and my Taiko Extreme because it lets a little more detail through, adds some body, and just sounds a little more quiet and calm. Overall, it’s a fairly subtle improvement on most tracks but good value given the low cost of the EtherRegen.
Hmm, not meaning to sound critical here but I guess what you are saying is that the DC cable doubles the value of the ER even if in your case the ER provides "a little more quiet and calm" ... and "overall, it’s a fairly subtle improvement".I estimate that, as with the router, the addition of the QSA DC cable doubled the sonic improvement of the EtherRegen alone.
It is a critical weak link in my experience, particularly if it is a busy router. I use Mikrotik CRS 305 configured as router which is 10G/SFP+ which is a screaming bargain for what it does for audio. Feed it good power and use it to isolate from your network using fibre and you leverage that benefit quite a lot.the router appears to be so vital to overall sound quality.
Like the PS Audio Memory Player.when the music is fully buffered effectively making the streamer a disconnected CD player.
Like the PS Audio Memory Player.
But even buffered music can be spoilt if the streamer is connected to the network.
My streamer is in Devialet Pro which I connect to via wifi which is better than fancy wired connections I tried. So it is isolated from the wired network, but still I can distinguish every tweak and change to every link and device enroute back to the mandatory the national broadband fibre network termination.
Maybe Pink Faun has been able to make its streamer almost immune to wired network noise.
Sorry, I dint mean to labour this off topic issue, however just to clarify, I have no network connected by wire to the Devialet (streamer) and can still detect changes in the upstream network, despite it also having fibre. My guess is noise (maybe phase noise) is getting into my Antipodes EX server (wired connection but isolated by fibre) and interfering with what shoukd be happening if things were perfect.The best sound of a network is no network.
Hi @dbastin -- I appreciate your thoughts. I've thought about running fiber rather than ethernet for my very long (60-80 feet) run through the house. In fact, I have a system at another house with another long run where I do use fiber and convert it at each end with a Sonore Optical Module.Have you considered running fibre from your router to the Ether Regen? With so much generic ethernet leading to the ER I'd speculate it is somewhat flooded with noise which possible reduces its effectiveness.
Hmm, not meaning to sound critical here but I guess what you are saying is that the DC cable doubles the value of the ER even if in your case the ER provides "a little more quiet and calm" ... and "overall, it’s a fairly subtle improvement".
The Gamma DC power cable, like our other cables, is offered in both the Revelation and Infinity Lines. Buyers have the flexibility to select the source and destination connectors that best suit their equipment (Oyaide DC-2.1, DC-2.5, XLR, GX12, GX16, Jaeger, etc.).Yeah, I agreed with you that everything seems to matter in digital!
I’m burning in a GI DC for my router despite my feeling it’s mostly optimized already. My guess is that last bit of quality will come from the power side. Also have a custom GI DC on the way with Jaeger to 2.1 barrel connection to externally power my USB card. I’m hoping for a good sound bump here as it’s rumored the custom DC can sound like an Ultimatum.
Oh btw, to clarify the recent changes on Anas’ website, there are now 2 versions of the DC cable - GR and GI. Both have standard extension (one female, one male) 2.1 barrel heads and are 0.9m long. Not 1.8m as stated in an earlier version of the website.
These heads can be modified to other types FREE OF CHARGE. In the past this was a paid extra in a custom form, no longer now.
And this latest summary supersedes the expire offer of the introductory $1000, 0.9m GI DC.
@QSA-LANEDRI , Anas after your clarifications to me by emails, it might be good to update your website too?
This afternoon @jeremya and I visited the home of @alwayslearning to hear his excellent system. The last time I heard it, he had yet to swap in any QSA Lanedri products...
It was a fun afternoon and I got to hear some great music that was unfamiliar to me. The QSA Lanedri products are fun to swap in because they make such an obvious improvement with no downside whatsoever.

This is a great point. We had talked a bit when I first arrived about maybe the extension cable adding a bit of brightness. Before we started swapping the additional items in, I had declared that there was no evidence of additional brightness from what I recalled of hearing the system prior to the QSA-L products being added. But what was interesting was that swapping in more QSA-L products actually did exactly what Jeremy mentioned in the above quote.Some of the brightness, sheen, or harshness of certain sections just receded, leaving only natural timbre and tonality.
Bear in mind I suspect Taiko is talking only about the SFP v RJ45 noise, and no the cable going into the RJ45. I wonder if 60 feet of wired ethernet cable will shunt more noise in than a SFP makes.Taiko's recommended setup is to run ethernet into the Switch (from the router) and then run an SFP DAC cable from router to Extreme. Why? Because an ethernet connection uses way less power than dual SFP fiber modules. A single SFP fiber module uses more power than the entire Switch design. More power = a lot more noise in the Taiko design. This is all explained in the Switch and Network Card summary in the Downloads section of the Taiko website.
That is very promising to hear. In your case perhaps it is so significant because the router is not powered via a dedicated AC supply or power conditioner. For example, I have my router in the hifi rack powered via dedicated AC, a power conditioner and decent LPS, all grounded with a very good grounding system ... but basic DC cables from audio manufacturers.it is not nearly as significant as the improvement with the DC cable on the router. That change is a no-brainer.
That is very promising to hear. In your case perhaps it is so significant because the router is not powered via a dedicated AC supply or power conditioner. For example, I have my router in the hifi rack powered via dedicated AC, a power conditioner and decent LPS, all grounded with a very good grounding system ... but basic DC cables from audio manufacturers.
Oh dear, I think what you saying is that with a non-dedicated and cruddy power source the DC cable will probably deliver about its worst performance ... which makes my speculation about the furthest from the reality you described.The enhancements delivered by QSA Lanedri cables are notably more pronounced when integrated into a dedicated setup, as they unveil an abundance of untapped potential
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