On the 26th to 28th of February this year the Bristol Marriott hotel hosts the biggest Hifi and AV show. The Bristol Sound and Vision Show draws AV and Hifi enthusiasts from all over the UK.

The Bristol Sound and vision show will be presenting new products from almost 200 brands including Yamaha, Sony, JVC, Mission, Wharfedale, Denon plus many more. The Sound and Vision Bristol show allows people to get close and demo the latest products, giving them chance to test them and relay feedback directly to the manufactures. Visits love that there are so many brands under one roof, no AV or Hifi shop in the country will have this many brands on display.

Many retailers like Sound and Vision, Digital Direct and HiFiBitz travel to the show to gain new accounts, see the products before they are launched so they know what they are selling and out of general interest.The show lasts 3 days, from the 26th to 28th of February, in that time the show is expected to see well over 5000 people come through the doors. If you don’t like crowds, maybe the Bristol show is not for you, so why not visits your local AV and Hifi retailer like Sound and Vision. Sound and Vision have electrical shops in Bolton and Leeds, and have accounts with over 150 brands most of which are exhibiting at the show. In the Sound and Vision shops there are over 200 products on display and are available for testing.

The structure of a light bulb is fairly simple. At the base, there are two small metal contacts which are connected to the ends of the electric circuit. These metal contacts are attached to two hard wires. These wires are attached to a fine metal filament. This filament stands in the centre of the bulb, held in place by a glass mount. The filament and all the wires are encased in a glass bulb which is filled with an inert gas, like argon.

When a light bulb is connected to a power supply, the electrical current runs from one metal contact to the other, moving through the filament and all the wires. Electrical current in a solid conductor is measurable by the movement of free electrons (ones that detach themselves from atoms) from an area with a negative charge to an area with a positive charge.

As the electrons zip along through the filament, they are constantly bumping into the atoms that make up the filament. The energy of each impact vibrates an atom — in other words, the current heats the atoms up. A thinner conductor heats up more easily than a thicker conductor because it is more resistant to the movement of electrons.