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deepthought

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  1. Best bit of advice on this thread so far.
  2. Interesting explanation in one of Galen Gareis' white papers: https://www.iconoclastcable.com/story/time.pdf 1.0 ELECTOMAGNETIC WAVE PROPOGATION The issue – What do we actually LISTEN to on a cable? What is the “root” reason to be for a cable? Cables exist to move the “signal” from one place to another, but few really consider WHAT that signal is. The signal we “use” is the electromagnetic wave moving down the cable at the group velocity of propagation of the dielectric. OK, what did I just say? Imagine our wire surrounded by a donut with a hole in the middle! The electromagnetic wave is this donut. There is an ELECTRIC (Efield) around our wire too, but this field is attached to the donut radially, and ninety degrees orthogonally to the donut’s circumference. To make the E-field, take a bunch of tooth picks and stick them all around the outside of the donut, that’s the E-field. Now we have two imaginary waves, one low frequency and one high, sitting there. To MOVE that field, electrons flow starts it happening. To keep it simple let’s distort our wire to be a TUBE full of marbles (electrons) that has an inside diameter the same as the marble’s diameter. To make the magnetic field move, and drag along the E-field with it, we apply an electromotive force (electrons / marbles) to the. When a marble is inserted into the end of the tube, the marble at the opposite end pops out as fast as the marble can be inserted into the send end of the tube. This “speed” is determined by the velocity of propagation of the dielectric, or the tube in our case. Something funny happens with the magnetic field though; it follows the PROGRESSION of the electron (marble) flow. When the marble is half way into the send end of the tube, our donut with all our toothpicks (the B and E fields) is halfway down the cable already! When the marble is inserted all the way in at the send end, the B and E fields are at the END of the cable. So the “signal” we use travels at the VP (velocity of propagation) of the cable, and NOT the speed of the electrons at all. Those move very slowly compared to the electromagnetic B and E fields. Now we have the donut at the end of the cable. But, we won’t ever see a baker’s dozen, or zillions more moving electrons appear at the same time at the opposite end of the cable if we carry more than one frequency concurrently since every frequency has a different VP through the audio band. All individual frequencies will have significant arrival time “distortion” between frequencies. In other words, every marble that represents a frequency in my example is inserted at a different speed (Velocity of Propagation) depending on the frequency the marble represents. Ideal cable should move a signal (now we know it is the B and E fields) down a wire at the same speed and shape at all frequencies. It doesn’t.
  3. Further information: Up for sale a Linear Power Supply. It has a 50VA transformer and is fitted with dual outlets that work at 9V DC and 12V DC. This is a very low noise unit and I have used it on a variety of equipment. 9V (about 1.5A) and 12V (about 1.8A) are quite common requirements for devices such as Modems, Routers, NAS devices, streamers etc. Current output is reasonably good too so it will power devices that place a bit of strain on the power supply. It has three levels of filtering are used: Level 1 EMI, Level 2 Capacitor Array, and Level 3 CLC to reduce output ripple to the lower instrument test limit. Totally silent and offers a very stable DC output. Photos: Has some small imperfections but presents well.
  4. Further information: Up for sale a Linear Power Supply. It has a 120VA transformer and is fitted with a very high current 12V DC outlet. This is a very low noise unit and I have used it on my Intel NUC which can accept a 12V to 24V input (https://www.intel.com.au/content/www/au/en/support/articles/000056906/intel-nuc.html) Totally silent of course and would go well with a fanless NUC. Also well suited to MAC Minis as also accept 12V. The MAC Mini can chew through a lot of power and at full tilt so the 12V at about 8amps is perfect if you are running something that uses a lot of CPU. Photos: It's in good condition but as always seems to be the case, the closeups make it look really grubby.
  5. Further information: Up for sale, a Sablon Audio 2020 USB Cable which replaced the Audio Reserva Elite USB cable that proceeded it. It has no 5V power conductor in it. In terms of sound, this cable is very close to my reference, the Wireworld Platinum Starlight. It has excellent detail, musicality, timbre and dynamics. There are only a few minor differences and those would be a matter of taste and system tuning - namely in my setup the Wireworld is a bit more forceful. In musical terms, it means things are a bit less relaxing with the WW and with the Sablon Audio cable you can lose yourself in the music more. The Sablon also has just a touch more of of lushness - not smoothness or fat. On the other hand the treble is perhaps a bit cleaner or more forward than the WW - not sure which is more accurate but the Sablon can do some really nice things with percussion. It also offers deep bass but is maybe even more accurate than the WW. Both great cables. Can't keep them both! Many manufacturers of high end USB cables argue that the 5V conductor leads to many problems with noise across in USB data transmission. There are many devices that do not use the VBUS to make a connection between the DAC and the transmitters (handshake). These include Lampizator / T&A / SOTM devices such as the TX Ultra / Mojo devices such as the Mystique / Nagra HD. There may be many more than this. If you do need the VBUS connection to perform the handshake you can use a device to inject 5V into to the cable, at the "B" plug termination. After discovering that I needed the VBUS to connect my Denefrips Hermes to my Auralic G1 Streamer, I used on of the devices in the picture which I got from Audiophonics in France. If you want to, I can include the one that I was using in the sale for an agreed amount. https://www.whatsbestforum.com/threads/sablon-usb-cable-2020-model.29912/ https://audiophilestyle.com/forums/topic/31295-sablon-audio-reserva-elite-usb-cable-merlins-magic/ Photos:
  6. Further information: Up for sale, a stereo pair of Synergistic Research Foundation Speaker Cable, total length is 2.7m and has Banana to Spade connectors - stereo pair (4 cables in total). These cables feature a combination of silver and copper conductors. These are an exceptionally well executed set of cables that offer a balanced and detailed sound which will work well with a range of equipment. Effortless sound with extended bass. They really draw you in to the music and represent the sweet spot in the SR range. Conductors are comprised of: 4 each Silver Air String: Silver Air Strings: 99.9999% pure monocrystal silver conductor 8 separate conductors Dielectric: Air (sealed) Shielding: Silver Braid 4 each High Current Copper Air String: Copper Air Strings: 99.95% pure copper conductor 8 separate conductors Dielectric: Air (sealed) Shielding: Silver Braid https://www.theabsolutesound.com/articles/synergistic-research-foundation-series-speaker-cable-and-interconnect https://positive-feedback.com/reviews/hardware-reviews/synergistic-research-foundation-cables/ Photos: This is one stereo pair, the other set are also in the same excellent condition
  7. Further information: I bought this recently off another Stereonetter to see if I could use it to get XLR out of my preamp then convert it into RCA for my amp'. Sounds about the same as RCA direct so no need to keep it. Converts 4 dB balanced signals to -10 dB unbalanced (XLR to RCA) and as it uses Jensen transformers. it eliminates hum and buzz caused by ground loops It's a passive unit with a very flat frequency response curve. High input impedance and low output impedance with very low distortion. https://www.jensen-transformers.com/product/pc-2xr/ Photos:
  8. I have the PC2 EVO+ . An amazing power filter that beat out all the other ones that I tried. Works particularly well with my Class-A amplifier. Obviously the PC3 will be better again. GLWS.
  9. Further information: Purely dynamic, designed to absorb noise and block interference, Wireworld’s innovative Fluxfield™ technology with COMPOSILEX® 2 insulation provide surprisingly vivid sound and imaging. Unlike other cords, they were developed through direct comparisons to battery power, the ultimate in sonic and visual purity. Their elegant plugs feature silver-clad contacts, for the quietest and lowest loss connections available. The five models differ in their conductor material, as the smoother current flow of superior conductors provides additional improvements in sound and image quality. Since they function as filters, longer lengths provide greater improvements and we recommend two meters or more for the best performance. I was using this to subwoofer as it is quite a long cable but I rejigged my setup so it's not getting used now. Photos:
  10. Further information: Sound performance is one of a very low noise, excellent detail, extended frequency response and a hint of warmth (not fuzzy, just a nice relaxing tone). I think the use of OPOCC copper might contribute to this but also the low dielectric insulation and special geometry of the conductors. They will adapt with any setup - I've had them linked up to Devialet amps, NAD, Nelson Pass and some cheaper stuff and they will pass through whatever signal they are feed accurately and with a sound that drags you into the music. If I had to be specific, I would say that they ever so slightly tip towards the low end so they give a nice presentation to the bass, a well balanced midrange and nice treble. In the case of using them with the Devialet, they presented a lot of detail and fantastic dynamics. With class-a amp's and tubes, they pass through the sweetness and timbre. I think these cables are in the sweet spot of the WW range - once you start to get into the Silver Plated cables you start to spend big bucks and they get a bit bright (to my tastes) They have a very nifty replaceable terminal connections so you have a choice of any combination of spades or terminals. They are solid copper with very thick silver plating. The cables are really well constructed and nice looking in a conservative way. RRP is $1500 and the replicable connectors are about $110 shipped for the set. Photos:
  11. Oh, OK. Not sure where I got the idea that it was up to model 3
  12. Item: Schiit JOTUNHEIM 2 Headphone Amp Price Range: fair market price Item Condition: New or Used Extra Info: Silver or black, whatever! Not interested in the 2 or 1 series!!! Please don't forget to report your post as FOUND when possible. (You can delete this text before pressing Submit).
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