Does Wire Matter?
Naturally, whenever the subject of premium cabling for
home a/v systems comes up, the important question arises: does wire really matter?
The answer is that sometimes it does, and sometimes it
doesn't, and that when it does, it's a purely subjective question whether the improvement
in sound or picture is really worth it. Because we've seen some rather odd products
being sold and some rather strange claims being made, we feel it might help to take
a quick, common-sense look at the cables in your a/v system and ask what they do and
whether, and why, it matters.
Cables That Don't Matter
At the outset, let's start by looking at the big
distinction between cable types: there are cables that carry audio and video signals, and
cables that don't. Audio and video are carried in various forms: RF ("radio
frequency"), component video, composite video, S-Video, and stereo analog audio
are the principal, though not the only, forms. These days, though, there can be a
lot of other wire associated with an a/v system: telephone lines connecting satellite
receivers and PVRs to the outside world, control cables allowing a TV to be used to
program a VCR or allowing a PVR to change channels on a satellite receiver, and all manner
of power cords, from the little transformer supplies for small a/v accessories on up to
regular three-pronged power strips, extension cords, and power supply cables.
Absent some sort of known malfunction, there's very
little reason to think that replacement of control or power cables will improve your
system's performance at all. There have been a lot of strange claims made in recent
years about power cords, and people paying hundreds or even thousands of dollars for them;
but the fact is that a power cord, so long as it's well-constructed and undamaged,
correctly sized for the load, and driving a reasonably well-designed power supply, should
make no difference whatsoever to the sound of your system. The same goes for these
other non-signal cables. If they seem to be working, don't mess with them.
Cables That Do Matter, and Why
That leaves us, then, with cables which actually convey
information from point to point in your system. The electrical principles involved
in moving information through a wire are well-established and not really all that
mysterious; if you would like to read a bit more detailed treatment of the subject, at the
risk of slight brain-bending, take a look at this page,
where we've constructed a sort of short lesson in electricity for you. But the thing
that you need to know is that a cable doesn't simply shunt electricity from one point to
another without alteration. The manner and extent to which a cable deviates from
that ideal is directly related to the physical structure of the cable and its
connectors. In general, a cable does three important things to a signal: it (1)
attenuates the signal, (2) contributes its own inductive and capacitive reactance, which
can alter different parts of the signal differently--of particular importance, attenuating
some frequencies, such as high audio notes, more than it attenuates others, and (3)
exposes the signal to electromagnetic energy from other sources which can enter the cable
and pollute the signal with noise.
The extent to which a cable does any or all of these
things to a signal is determined by the cable's physical structure and the environment in
which it operates. Attenuation of the signal is directly related to the nature and
configuration of the conductors. Inductive and capacitive reactance result from the
structure of the conductors themselves, their placement in relation to one another, and
the nature of the material placed between them. Exposure to outside electromagnetic
fields is heavily influenced by the extent and type of shielding provided by the outer
braid of the cable. Ditto for the connectors, which contribute their own
capacitance, inductance, and shielding characteristics, and ditto yet again for the
juncture between the connector and the coax and between the connector and the jack.
So, while it's true that "wire is wire," the big questions are "what kind
of wire is it, and what is it doing?"
Now, it seems that there's a lot of mystery surrounding
cables, much of it created by those in the business of selling them, and our experience is
that the higher the asking price is, the deeper the mystery usually runs. But the
fact is that these basic, well-known aspects of an audio/video cable are the fundamentals
which control whether it conveys a signal poorly, satisfactorily, or exceptionally
well. A well-insulated, well-shielded, physically durable, low-capacitance cable
terminated with fully-shielded, impedance-matched connectors that make sound electrical
contact with both the coax and the jack will outperform all comers--cheap or
expensive--every time. Electrons don't know how much you spend on cable; they only
know what your cable looks like inside.
How Much Does It Matter, and is it Worthwhile?
This is where things turn subjective. Better
cables will deliver cleaner signals throughout your a/v system; that's a fact, which can
be objectively proven. But how does that translate into what you see and hear when
you watch and listen? It's fair to say that people differ greatly in their ability
to tell the difference between cables or components, and meanwhile, systems vary in their
response to different cables. We think you'll find our cables well worth the money,
but of course there's only one person who can decide whether the upgrade in audio/video
performance is worthwhile, and that's you. We hope that by offering you these cables
at a less-than-bank-breaking price, and with an unconditional 30-day money back guarantee,
we make it a little easier for you to choose the ultimate in a/v performance for your
home.
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