Power Packs

Power Packs are the top module in a system and they have the main power for the flash stored inside with various levels of watt seconds (joules).  The Packs usually have the adjustments for the output and the head jacks to plug the Flash Heads into.  The Power Packs need to be powered by a Battery or AC Adapter.  Most Packs can also use additional modules to be boosted to higher power levels or recycle faster when needed.

The Classic Packs and the Next Generation Packs have two switches on top for the power selection.  The Signature Series Packs have a round knob on top and offer more power serttings down to lower levels.  The Action Packs are for stopping action and have a very fast flash duration.