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So what's the difference between
the Combo Intercom Audio Interface & the Beltpack Breakout Box?

The Combo Intercom Audio Interface operates off of the 3 pin XLR party line, and is a sum of what every person says into it. So the combo is an inexpensive way to get the entire com line into an In Ear Monitor of a monitor engineer or musician, or put an audio mix on the com line for everybody to hear.

However, since what you put into it shows up at the output, it's not the solution for interfacing with a different intercom system, as that would likely cause a feedback loop.

To interface with a different intercom sytem, you would want the Beltpack Breakout Box. It plugs into the 4 pin headset out of a beltpack, which conveniently has divided com into a discrete input (for the mic) & output (for headphones).

It gives you control over how much of mic you want to hear in your headphones (sidetone). In this case you want nothing (to avoid feedback loops), so you'll want to turn sidetone all the way down on the beltpack.

The input is padded down, so that BBB input & output are both line level. You can use the headphone level on the beltpack to adjust the output if you wish. It does, of course, use up a beltpack while in use. Which may or may not be a big deal in your individual situation.

Combo (left) BBB (right)


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Quick Tips for Preventing feedback in PA Systems
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Here's a pdf of an article I wrote for Audio Media Magazine
"Interfacing with Inexperienced Clients"


About the Owner
photo of Lonnie Bedell of AVlifesavers.com My name is Lonnie Bedell, and I'm the guy behind AVLifesavers. Unlike big companies, I've been doing actual live sound work since 1995, and live recordings since 1985.
It's that kind of real world experience that I feel makes AVLifesavers stand out. It's one thing to examine problems theoretically, it's a whole different thing to deal with frantic last minute changes from an inexperienced client who wants it done yesterday.

Been there, done that, so I've designed products to solve live sound problem fast.

All products are assembled right here in the USA. Living Wages to American workers is and will always be part of the fabric here, despite the temptations.

Click to Read more...


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