Can someone explain to me like I’m dumb - best method for connecting multiple lasers

I currently have two laser fixtures but will be soon upgrading to four.

currently, I have one Helios dac that I am running to laser 1 and then daisy chaining to laser 2

I’m curious what my options are outside of purchasing 4 separate Helios boxes, to get independent control of all 4 lasers, and at about 100 feet away from the units (for gigs).

Any and all suggestions welcome.

Hi Eric!

I’m loving the work you’re posting over on Facebook - it looks great!

It’s not a stupid question at all, in fact scaling up to the next level is one of the biggest blockers in the industry. It’s very common for companies and freelancers to make their own custom gear so everyone’s left to figure it out for themselves! It’s one of the things I hope to make easier in the laser industry, but I have to focus on one thing at a time, and right now it’s fixing the software stack.

But let’s try - it’s hard to give a short answer… but here goes! :slightly_smiling_face:

What you’re doing now

One Helios DAC → ILDA to Laser 1 → daisy chain to Laser 2

That works if you’re happy with mirrored output.

Just to clarify, Liberation’s licence tiers are based on how many lasers you’re operating in professional contexts. For public or commercial shows, the expectation is that each laser is driven by its own controller rather than splitting a single output. That approach gives you proper safety, control and creative flexibility.

If you want independent control of all 4 lasers, each one needs its own controller anyway.


Option 1 - Multiple Helios controllers + USB extension

Technically you can do this:

  • 4 x Helios controllers
  • A powered USB hub
  • A USB extender to get from FOH to stage, around 100ft
  • Put the controllers, hub, etc in a rack case
  • Run 4 x ILDA cables from the rack to each laser
  • Run your interlock signal separately

This setup can work, and some people have had success with it.

But…

USB over long distances can be hit and miss. Even with active extenders, you’re stretching what USB was designed for. When it works, it’s fine. When it doesn’t, it’s stressful at show time.

And using long ILDA cables can be a nightmare. Their nickname is “grappling hooks” for a reason!

If you’re building a 4-laser gigging rig, this is usually the point where it makes sense to move to network.


Option 2 - Network controllers (recommended)

The cleaner long-term solution is Ethernet-based controllers like Ether Dream or the Helios Pro (support is coming soon!).

Best setup:

  • Install a network controller inside each laser
  • Run Cat5e or Cat6 to stage
  • Put a network switch stage-side
  • One network cable from FOH to the switch
  • Shorter cable runs from the switch to each laser

Benefits:

  • Designed for long cable runs
  • Much more stable over 100ft
  • Easy to scale beyond 4 lasers later
  • Cleaner cabling
  • No USB extender unpredictability

Once you move to network, you generally don’t go back. If you can get mini switches inside the lasers, you’ll can daisy chain the network connection as well, which is life-changing (although risky).

(Some people do a hybrid approach where all the Ether Dreams are in a stage box with network switch and ILDA cables, and that’s not bad either - but again with the grappling hooks)


Short version

  • For professional gigs, plan on one controller per laser
  • 4 x Helios over USB is possible, but not ideal over 100ft
  • Network controllers are the better long-term solution
  • Ether Dreams + a stage-side switch is the cleanest setup

Bear in mind that I advise that you put a router on the network to assign IP addresses to all the network devices.

The next step is to combine the interlock signal into the data signal, but that’s a whole other story.

Hope that helps, and all the best with your on-going journey!

Seb

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Seb, thank you so much for the thorough response and also the kind words! I noticed you’ve been seeing my videos. My hope is to get a better camera set up and keep posting content on socials as I am having an ABSOLUTE BLAST with it. Thank you for your continued efforts and making the dream a much more feasible reality for us folks.

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