Archive for the ‘Low voltage pre-wire’ Category

TV and Sound System Installation

Monday, September 19th, 2011

The easiest way to get the right TV and music system installation is to speak with a qualified system designer well before you buy anything.  Most people don’t realize the planning that should go into setting up a TV or music system.  Even a system as simple as a TV on the wall with a cable box can be installed cheaper, and perform better, with the proper planning.  Without proper planning, coaxial cables, data cables, speaker cables, and line-level cables are often run to the wrong place or left out entirely.  A home cannot be pre-wired correctly, and at minimum cost, without the homeowner’s anticipated needs being taken into account.  If construction is already going on in the home, it’s advantageous to have that conversation with an a/v designer at least one month before the work is finished.  This way, your audio/video outfit can wire while your place is torn apart, rather than have to make fresh holes which you’ll have to fix!

Lots of homeowners don’t like to have this conversation with an audio/video specialist.  They may think that the gear they buy will automatically do what they need, because their needs are simple.  They say they wouldn’t know what to talk about with a system designer.  They say, in their own way, that they’re not audiophiles or videophiles.  But, there is no correlation between the need for planning and one’s passion for, or knowledge of, things audio or video.  Rather, planning is required to correctly execute certain types of installations and to fulfill certain user needs.

Again, it’s not about how much the end-user loves music or movies.  Indeed, a real hi-fi freak may need no planning, because his interest is in state of the art equipment sitting in an open rack—the better to regularly move gear around.  An example is the enthusiast who constantly tinkers and “upgrades.”  There is no wiring behind walls for this guy, there is no wall mounted TV, and there is no equipment hidden in a closet or cabinet—three criteria that pretty much guarantee you need advanced expert planning.  On the other hand, the couple who want things looking neat and tidy, who might have some background music playing when company is over, who want to be able to plop down on the couch and watch TV at night without needing an engineering degree:  these are the ones for whom planning is critical.

Thinking that your needs are simple, and so not planning properly, will hurt you every time.  People who say their needs are simple often want the following system features. These features all require particular wiring, and additional equipment that is easily missed.

Features that necessitate an a/v plan before you wire:

  1. Ability to listen to TV through the TV speakers only, but also the ability to listen through the stereo or surround sound system.  For instance, some homeowners want the nightly news played through the TV speakers, and they want the HBO movie, or the 60’s music channel, played through the surround sound speakers.
  2. Ability to have music from one centralized audio system play in more than one room (i.e. a multi-room music system).  People will have their electrician or their builder handle this wiring without the audio/video system figured out in advance.  The resulting wiring is usually wrong.  Even a home theater expert would need a proper system design if he’s going to get the wiring right, and this design requires planning between the a/v designer and the client.
  3. Ability, in a multi-room music system, to play one thing outside—say the iPod—while cable TV is being watched in the Family Room.
  4. Ability, in a multi-room music system, to control volume from whatever room you’re listening in.
  5. Ability to hide the equipment from sight.
  6. Ability to see the TV from different angles.
  7. Ability, in a multi-room music system, to change radio stations, or songs on an iPod, or tracks on a CD (i.e. control beyond simply changing volume), from rooms other than the one the music system is in.

Lots of homeowners don’t like to have the planning conversation with a system designer because they want to buy at cheaper prices than the designer sells at.  This is missing the point, which is to not be penny wise and pound foolish.  Besides, it’s the good system designer who often saves people money by keeping them from more expensive equipment that they will not appreciate.  Indeed, as the TV market now stands, and has stood since the advent of flat panel TV’s, the TV that would make any given consumer most happy—even if any TV could be had for free—is almost never the most expensive one.   This is often the case for sound systems, as well.

Do yourself a favor, and reach out to your local audio and video specialist.  In addition to getting more for your dollar, or even spending less, the experience is usually more positive than when dealing with the big box retailers.  Consultations are often in-home, providing you with the undivided attention of the system designer.  Typically, when you need something else after the sale (e.g. more equipment, upgrade, service), you have the pleasure of dealing with an organization that remembers you.

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Careful With That Cable, Eugene.

Wednesday, June 30th, 2010

HDMI cables promise so much.  Instead of 3 component video cables and audio cables running to your a/v receiver or to your high definition TV, one HDMI cable will do.  Instead of a 1080i image resolution limit, as with component video, HDMI was designed for 1080P and higher.  Instead of 6 audio channels at lower-than-CD resolution, HDMI gives them at greater-than-CD resolution.  Instead of having to run a separate ethernet cable, future HDMI enabled devices will be networked via the same HDMI cable that carries audio and video.  And, the copy protection that Hollywood enjoys courtesy of the HDMI interface, the entire reason HDMI came about in the first place, is no doubt why the studios are willing to give us movies in high-definition.  They weren’t going to let high definition DVD (e.g. Blu-ray) happen via the component video outputs. Component video didn’t provide a satisfactory copy protection solution.

Yet, anyone who makes his living designing or installing audio/video systems knows that HDMI can add days of unpaid installation time, can cause massive frustration, and can leave customers wondering about who they hired and the wisdom of their a/v investment.  In a massively frustrating and seemingly unknowable way, HDMI often doesn’t work!

Consider what goes wrong with HDMI cables; problems which, by the way, our old component video and audio cables don’t have.  Cable boxes don’t display on TVs when HDMI is used to directly link the two.  Video doesn’t show up on TV screens when HDMI is run through a switcher (e.g. an A/V receiver) on its way to the TV.  Or, consider this teaser, which cost me personally about 8 hours of troubleshooting.  A cable box runs HDMI to a receiver, as does a Blu-ray player. Then, from the receiver, HDMI is run to the TV.   If the customer wants to watch the cable box, the only way is to first bring up the picture from the DVD player!  The knowledgeable folks at Denon recently informed me that this is a known problem.

It’s a rare installer of HDMI who hasn’t had these problems.  Of course, he checks the source component, checks the switcher, checks the display device, and he checks the cable and they all check out fine when used with other associated equipment!  It’s certain combinations of equipment—for the most part unknowable until you try them—that don’t work!  As I was recently informed while attending the above referenced Denon training, a lot of this has to do with poorly manufactured HDMI cables.  They’re not made to the standards that they need to be and, as of now, there is almost no way for the buyer to know.  (Kudos to DPL Labs (www.dpllabs.com) for establishing HDMI ratings for HDMI enabled equipment and for HDMI cables.  Consumers need more manufacturers to sign on to this program.)

Aside from needing quality cables, consumers often need firmware updates to get HDMI to work.  I’ve seen such an update work for a Time Warner cable box.  That customer was lucky Time Warner had an update available.  Just this week I saw a homeowner pay out an additional $580 for a component video and analog audio solution because the necessary firmware update, to get HDMI to work between his Fios box and his TV, isn’t yet available.  The customer is out $580 while the installer spent 8 hours of unpaid labor trying an HDMI amplifier, failed firmware updates, the suggestions of three tech support departments, and various other solutions since repressed by his tormented mind.

But wait—it gets better.  Indications are that component video outputs—which reliably give high-definition (i.e. 1080i) resolution—are being phased out.  This means you may not see them anymore on DVD players or cable boxes or satellite boxes or on A/V receivers.  Furthermore, even if they are present on future products, they will not output HD signals!  And, if you do install HDMI cable and if it does work now, it’s likely still not the kind of HDMI cable that you need to pass full resolution 3D video—OK, you may not care—or that you need to carry the Internet.  I know of only one vendor of such cable.  For those of you pre-wiring your walls, one solution to all this mess is to make sure your a/v designer specs high quality data cable to handle your high resolution audio and video needs, as well as your networking needs.

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