pipelineaudio said...
All theapplicant would have to do is make some awful cables with tons of capacitance and the resultant hi end loss..
Well, there's no need to make them. They already exist and are manufactured by Alpha Goertz. The cables are essentially two ribbons separated by an insulating dielectric. Similar if you will to taking a capacitor and unwinding it. The capacitance, which is signficant, can cause or exascerbate amplifier instability which can result in audible consequences due to oscillation. See, for example, Kal Rubinson's review in Stereophile of a multi-channel Adcom amp.
technoextreme said...
Can someone please answer this question. Why is it that my textbook says to ignore the capacitance/inductance at these low frequencies. It says that a wire is nothing but a wire unless you have 56km of it. Also that would be a simple act of asking for the characteristic impedance of the cable. He might as well get two different cables that have the same characteristic impedance.
In most cases, with wire that's not like the example I mentioned above, it is irrelevent for nominal speaker wire lengths. Say 3 or 4 meters. The characteristic impedance is irrelevent for speaker wire. Speakers are designed to be driven by voltage sources.
Regarding the testing protocol, it remains to be seen what Mr. Fremer will select as the alternate cable. While it is unclear to me how PearCable actually obtained their data (it appears that maybe it was calculated) for their cable, I would hazard to say that zip cord of similar gauge would be more than sufficient.
I recommend that whatever principals at the JREF are involved with the testing protocol, contact
Tom Nousaine. He has done a number of these comparisons, has published, is a noted debunker of audio foolery, and I believe still has an ABX box which would facilitate matters. Otherwise, one may be able to obtain one from QSC by contacting Bob Lee, who I think would be thrilled to provide a loaner. Further information, including contact info can be found at his website: nousaine dot com
BTW, there is no reason for Mr. Fremer to indicate which cable is better. He need to simply reliably identify the cable under the ABX protocol.
Some may find it interesting that a number of years ago, Tom was presenting at an AES (Audio Engineering Society) meeting and was publically challenged by Jack Summer, owner of Transparent Audio (they make PearCables look cheap), that he could easily tell identify his product. He invited anyone up to his place in Maine. Regretfully, when Tom and others appeared at Jack Summer's home some time later, Jack refused. This is like offering a person the shirt off your back and then one day the person asks you for your shirt.
Note, that Mr. Fremer is looking to include interconnects (those cables that go between an amp and preamp for example) also and is looking for a concession by Randi that those cables can result in audible differences. There is a cable, made by Cyberlight I believe, that was reviewed by Fremer in Stereophile. This particular cable takes an analog signal, converts it to light, then reconverts it back to an analog signal. Measurements done at Stereophile indicated that the vendor has effectively been able to introduce very significant amounts of audible distortion products.
Regarding Adam Blake, who has piqued my curiousity, it doesn't appear that he makes his cables. There is an address given on his website,
PearCables
134 Eliot Avenue
West Newton, MA 02465
However, a search at the town of Newton's Assessment Office, turns up that this property is a single family house with the owners stated as being Bruce N. & Patricia L. Nelson. A Zabasearch of Adam Blake indicates he has had several addresses in Massachusetts, with one of them being the one above. It appears that Adam Blake has a hard time living in one place for any length of time and I guess is bunking with the Nelson's now. Seeing as how two of his distributors are overseas, I suspect he's buying his wire from one of the many Chinese or Hong Kong outfits that cater to this sort of thing. Perhaps he's even buying it fully assembled (terminated, covered, PearCable shrink tubing already attached). If so, and he doesn't indicate the country of origin or disguising it by ripping off tags, he may be running afoul of various federal laws. Just like what happened with Tara Labs a few years back when they were raided by the Feds. I'm currently awaiting a response to an inquiry made upon my behalf. Hopefully Adam Blake is properly reporting the income from his little business venture and has informed the town of Newton. It would be devastating if a business was being conducted in a dwelling not zoned for such.
I commend the JREF for taking this matter on. While it doesn't rise to the level of claims for products and services that have the possibility of affecting human health and lives, it will garner signficant attention and get more people talking, thinking, and taking action.
Rather he may be obtaining them