Upgrading Hi-Fi Interconnects

In this video


Hans Beekhuysen describes how he gets rid of excess sibilance (that “sssss” sound) that can appear even on audiophile records such as Jennifer Warnes’ Famous Blue Raincoat. Since his systems are already hi-end, he chooses to upgrade the interconnects, by spending over £1,000 on cables from Audio Quest and a LAN Adapter from Pink. He says these make a difference to the sound, and he does this for a living, so I’m going to take his word for it.

There’s a lot of scepticism about the improvement an interconnect can make. Cable isn’t passive. Like any electrical component, it has resistance, capacitance and inductance, however small, and the effect of last two vary with the frequency of the signal. Resistance causes loss of power by turning the current to heat, while inductance and capacitance cause a phase shift that changes with frequency, distorting the waveform that makes the ‘digital' signal. This might be enough to cause a change in the content of the signal at some points, turning a 0 into a 1, which will be converted by the DAC to an analogue waveform that gets passed to the amplifier and passed to the loudspeakers. The interconnects cannot make the signal better, only leave it the same, or make it worse.

So if a change of interconnect seems to improve the signal, it means a two things: a) the digital signal from the source must be of a very high quality, and b) the amplifier, speaker cables and speakers must also be high quality. What does ‘high quality’ mean? That they must be able to respond faithfully to the tiny changes in signal that changing the interconnects produces. They must have a great deal of precision and low intrinsic noise from thermal effects, power voltage variations and so on. Using a £500 interconnect between an iPhone headphone jack and a low-end amplifier from Sainsburys is silly: all it will do is more faithfully transmit the distortions of the low-quality iPhone DAC. Using expensive interconnects between high-end kit might make a noticeable difference, as it more faithfully transmits a high-quality signal.

£1,000 is slightly more than I spent on my Marantz / B&W kit. It makes no sense for me to buy expensive interconnects, because, though the Marantz CD6005 blew away the Marantz CD5005 it replaced, and that blew away the Cambridge Audio player, which blew the Denon I had before that, I doubt the CD6005 has the industry’s best DAC. It might help to get some better interconnects, rather than the usual grey cable ones provided, just as one should set aside the Apple ear buds as reserves and buy some decent ear phones from Bose, Sennheiser or other manufacturers who know what they are doing.

I suspect that audio equipment is a lot like cars: there’s low-price stuff that doesn’t drive or perform well and is uncomfortable, and there are Rolls-Royces and Ferraris, but mostly there are solid, mid-range cars that keep getting better and better, but will never be a Bugatti. On the other hand, a modern Fiat Punto will leave most 1960’s sports cars in the rear-view mirror, will brake harder and corner faster, and only E-type Jaguars and AC Cobras will leave it behind. (Don’t believe me? An early 1960’s E-type with a 3.8 litre engine did 0-60 in 7.1 seconds. A 2010 Fiato Punto 1.4 Evo does 0-60 in 8.5 seconds. As for the aerodynamics of those 1960’s cars? Awful.) Streaming 320kps MP3 through my iPad and a Dragonfly DAC gives me a better signal than my 1970’s Goldring Lenco turntable with its Shure cartridge and diamond stylus.

With modern manufacturing techniques, I’m fairly sure there’s no significant additional overhead to making a high-end cable out of some superior materials - the difference will be the cost of the materials, and that will be far less than the difference in price the market will pay for a high-end interconnect. Supplying the small audiophile market with a £500 interconnect can still be profitable, and it also serves to re-position the price of the mid-range stuff - suddenly £100 doesn’t look so bad. I think this is the real reason expensive interconnects are produced: it’s a great marketing device, and makes a unit profit. It may even actually make a difference.