Bruce/All:
For the record, I have a B.S.E. and M.S.E in engineering. I'm a senior engineer at a major corporation.
Frankly, I don't care if anyone agrees with me or not.
I once took the position of Peter A (The Audio Critic) and Bruce. He wrote a multi-part essay that was actually pretty interesting. Long ago, Peter described how cables did not make a large difference in his experimentation. He measured the freq. response and found that cables approximated low-pass filters with similar freq. response curves. Peter found that the largest measurable difference was in the roll off between various brands. I once posted to this and other forums about how ignorant one must be to believe there could possibly be a difference.
To this end, I actually constructed my own set of cables for my reasonably high-end system. I cross connected a pair of Belden 89259 (copper coax, teflon, conductor, teflon) per speaker, twisted the cables to minimize inductance, and terminated them with high quality terminators. This cable recipe was recommended by Jon Risch, who published AES paper, preprint #3178, "A User Friendly Methodology for Subjective Listening tests", presented at the 91st AES convention, October, 1991. Measurably, these cables are quite superior to many high-end cables due to the low C, good I, and reasonable R. It is well known that the topology, configuration (biwire vs. single wire), materials used for conductors, materials used for insulators, wire topology (very important), external interactions/shielding, as well as the RLC impacts the performance of a cable. The question is: to what degree?
One day, an audio reviewer came to my home to listen to my system. He insisted that my cables were inferior and that he could hear differences with his Tera Labs cables. Frankly, I thought he was insane.
A few weeks later, I decided to do my own comparisons with several popular low to high-end cable brands to form my own opinions. For some comparisons, I also invited some fellow engineers, one with a Master's degree and one with a BSE, to help me evaluate them. The MSE was highly biased against cables as I was.
Results: The Harmonic Technology cables were significantly smoother than the rest. The sound was so much more fluid and realistic. The noise floor was quite good. Finally, the improvement in the soundstage was absolutely apparent and very significant. I was quite shocked by the results. Question: How does one measure the ability of a cable to project an unbelievably realistic soundstage?
To shorten this response, there were three partitions:
Harmonic Tech was far superior to the rest for the reasons noted above.
Straightwire level 4, Transparent mid-level, Belden 89259 cross-connected, Audioquest, and others were pretty similar -- much more difficult to differentiate.
Ultralink, bi-wire 12-gauge on bass and 14-gauge OFC, sounded muffled. Note that these are just pure copper cables, like those recommended by Bruce.
Re: representative sets. No, I didn't evaluate all the cables on the market. I didn't evaluate Analysis Plus, which I'd like to do sometime.
Also, you can see by the partitions that there was a set of cables that were pretty close, with widely varying price. As a result, be sure your sample set is as large as possible. Try to include Harmonic Tech.
Re: spending the money and trying to justify it. Actually, I had loaned all the cables and had not paid a cent for the use of them. I did custom order a slew of HT cable as a result of my auditions, but again, I didn't even purchase the cables I auditioned.
Re: cables in speakers. My speakers have bundles of varying thicknesses of 6 9's copper. The bundle size in inversely proportional to the frequency range handled by the drivers (bass == most bundles, treble == least). I do not recall the gauge, but they are quite significant. The cables are also extremely short.
Re: more wiring data. Bi-wiring is provably measurably superior.
But, in the end, you have to decide if:
a.) you can hear the difference, depending on the resolution of your ears or system.
b.) you can afford the difference.
I shotgunned (double run) HT cable to my front three speakers. I bought HT speaker cables for all speakers, HT interconnect from preamp to amps, and HT digital cable.
Enjoy the music.
-Mark Davis
* No affiliation with Harmonic Technology.
[This message has been edited by mdavis (edited 12-02-2000).]