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Organizers are promising a new kind of fireworks show on Fourth of July this year in Boston.  [[SLIDE]]

A new pyrotechnics company, a reconfiguration of the barges on the Charles River, and pyrotechnics fired from the Massachusetts Avenue bridge will all contribute to a fireworks display like no other on the Fourth of July in Boston, event organizers said today.

Promising “basically every firework shell you’ve ever seen,” pyrotechnics show producer Matt Shea said this year’s show will include about 16,000 different effects, or individual bursts of color.

“This year’s challenge was to not only design a fireworks display for Boston, but also to bring Boston into the concept,” Shea, from Atlas PyroVision of Jaffrey, N.H., said. “Viewers of this year’s fireworks show will feel that this show is different from anything they have ever seen.”

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For the first time in the event’s 40-year history, the Fourth of July fireworks display on the Charles River will include pyrotechnics fired off the Massachusetts Avenue bridge, which will be closed to vehicular and pedestrian traffic.

Fireworks are “explosives that lift out of a mortar and travel a distance,” while the pyrotechnics on the bridge are similar to spark fountains, according to Steve MacDonald of Boston 4 Productions, which produces the event.

The pyrotechnics on the bridge, lined up for more than 1,000 feet, will contribute to a “new visual perspective” and “amazing sight lines to everyone watching the display,” Shea said.

From the barges on the Charles River, which are positioned differently this year, Shea will set off hundreds of fireworks in synchronization with a soundtrack during the 20-minute display.

Shea will also launch fireworks from two satellite barges, each one about 400 feet away from the main barge.