The X4DL has 400ws of capacitors inside of it and it can be placed between most Packs and any Battery to add 200ws or 400ws of extra power to the Pack. This is our most diverse and powerful Booster module.
It also has two additional Head Jacks that could be used to divide the power between several Heads even at asymmetrical levels. Each has a switch to send the additional boost power or use the power at either 100ws or 200ws for its own Head jack. One is on the front and the second is on the back of this Booster. If you don't want the Boost power and are not using the extra Head Jacks, this is basically turned off.
The X4DL Deluxe Booster has indicators that flash when it is charged up and ready to go. There is a small brass contact on the top and bottom that passes along information to the Signature Series Power Packs.
The Booster can add 400ws to the 400ws Packs. It’s then able to put out 800ws which is about an f-stop brighter than 400ws. You could boost the front haft of 200ws to the Pack above it and still use 100ws or 200ws from the rear Head jack.
If you prefer even more power, you can also stack these Boosters, so three 400ws Boosters along with a 400ws Power Pack would give 1600ws which is a full f-stop brighter than 800ws. Stacked Booster power can be used from the front Head jack of the Booster if you prefer.
Most photographers who have a 400ws Pack would select one 400ws Booster. This one is perfect for more complicated setups with multiple Heads being used at once.
Boosters must work together with a Power Pack and a power source like a Battery or AC Power Supply, but they do not work by themselves. The Power Pack has the brains, while the Boosters just add extra muscle.
There are Power Packs like the Action Packs and the #068 660ws Packs that DO NOT work with Boosters. In the 1970’s we built Top Modules that are still functioning, and in some cases, being used with some regularity for over about 40 years, these are not boostable. Although we have attempted to make the products photographer proof and make them such that they just won’t affect anything, please don’t even try to boost those Packs.
However, the other Classic Packs like the 200ws Packs of the #065 series with all the letter code options and 400ws versions #067X,L,M,Z all work great with Boosters.
The newer Next Generation equipment is faster recycling and has Battery gauges but is otherwise the same as the Classic stuff with the two switches to control the power. In all these cases, the lower power settings are unaffected by the Booster and only the highest power setting on the Pack is “added to” with any combination of Boosters up to a maximum of 2400ws.
Otherwise, the Signature Series Packs with the big dial to control the power level are different, because when a double power Booster is attached then all the settings have roughly double the power that they had before. It’s not as linear (keeping perfect f-stops between settings) but it is about double power for all settings when system power is doubled. If you continue to stack Boosters up to 2400ws the settings would each be roughly six times original with the full power at 2400ws.
We want to remind you that as the power goes up the flash duration does get longer. We find that 400ws and occasionally 800ws is sufficient for most images. In cases where you want to take a night time or flash illuminated exposure of a whole bridge span or a full building, or even super large groups over a hundred people against daylight, then I understand the need for higher power levels. We have not tested much above 2400ws.
The power can be split between multiple Heads to shorten the flash duration. Only these Deluxe Boosters have independent Head jacks that can be controlled at asymmetrical power levels to the ones on the Power Pack.
The X4DL Deluxe Booster's front Head jack can be used at higher power levels too because the 200ws setting is also Boostable by having the back boost the front or by other Booster's below it. In the Boost setting, the front passes all the Boost upward to the Pack. The back of the X4DL can keep its 200ws separate and use it for the rear Head jack at 100ws or 200ws.