UK cable supplier reported to Advertising Standards Authority
A UK cable supplier has been reported to the Advertising Standards Authority who regulate all advertising in the UK. In brief, the customer complained about the Claims made of this cable in the suppliers literature .... (I quote exactly)
1. "The key to success of our PowerKords is KIMBER's unique cable weave which has proven to dramatically reduce Radio Frequency Interference (RFI) already on the mains supply and to reject further pick up of RFI ...", because he believed the PowerKord cable would have little affect on conducted electromagnetic interference;
2. "... Distortion levels inside equipment is vastly reduced, letting you hear a sound that is vastly clearer and purer, more detailed and far more dynamic ...", because he believed the Signature PowerKord cable would have little affect on measurable distortion in hi-fi equipment, and
3. "... eliminate system sound fluctuation and help to create a super-quiet noise floor, allowing more believable dynamics, deeper bass and lower high frequency distortion ... Listen out for a quieter noise floor (expect more dynamic music and greater detail) and a much more cohesive musical sound ...", because he believed the advertised spike-protecting devices would have little affect on the noise floor in hi-fi equipment.
The ASA considered the case, asked for Expert Witness opinion and concluded - (quote)
Our expert considered that [the advertiser] had not supplied any supporting evidence to prove that the noise floor in the audio signal chain was lowered by the advertised devices. He said it had shown that the noise floor on the mains supply could be reduced, but this appeared to be common modes. He understood differential modes were actually more significant than common modes and believed the devices were not dealing with the biggest cause of mains supply spikes. He said no evidence had been provided to show that spike-protecting devices affected audio signals, as opposed to mains voltages. The expert believed it was possible to test the noise floor of a system objectively without perceptual testing and believed this could be done for both a standard mains cable and the Mega/Super Clamp Ultra and the results compared. We considered that the evidence submitted was not sufficiently robust to show that spike-protecting devices would eliminate system sound fluctuation and help create a super-quiet noise floor. We concluded that the ad was misleading.
We told [the advertiser] not use the claims again unless they could substantiate them with robust scientific evidence".
I do not want to comment on this particular case, but I do want to draw your attention to the fact that we have been promoting the Scientific Method here.
Alan A. Shaw
Harbeth Audio UK