Amplifier Isolation Box – Pictures

Here are some better pictures of our Guitar Amplifier Isolation Boxes.

They’re strong enough to stack two high.

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Pay no attention to the Avalon other stuff on top of the box. As you can see, the top of the box acts as a great storage area…

The inside of the box also acts as a great water bottle storage area 😉

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Fan, blowing the hot air out.



15 thoughts on “Amplifier Isolation Box – Pictures

  1. That, sir, is beautiful. We were going to build iso boxes, but honestly haven’t found the time to do so. I really appreciate you sharing the plans and pictures — I’m sure there are tons of people who will benefit from this…

  2. My only complaint about the boxes is that they are placed too close to the monitor console. It tends to get a little loud backstage, even with the sound isolation.

    However, with the number of X3 users of late, it hasn’t been a problem. Maybe we can keep Reid’s trained ferrets in there from now on.

  3. Thanks for sharing! What are the two types of acoustic panels being used?

    I’ve heard these can generate a lot of heat. If I can’t open the doors during the message, would two fans be necessary to keep the amp cool?

  4. Matt,

    Yeah, they get hot, especially with a tube amp. I’d probably try a couple fans. But it won’t be in there (where you can’t open the doors) for more than the length of your service, I assume. Our guys have ’em going through a whole 2 hour rehearsal, so take that as you will.

  5. So I know this thread conversation is old, but what are the dimensions of that box…. Also what kind of sound proofing did you use? And did you just have an open hole in the side of the box for the fan, and if so, does it affect the sound isolation?

    • The boxes shown are the older version, built small enough to fit on top of one another in our small backstage area, but large enough to fit a large speaker cabinet, like a 4×10, etc. (Although none of our guys use anything that big anymore – most are smaller combo amps like an AC15 or AC30, Fender Reverb, etc.) So each box is a little over 3′ tall, and about 4′ deep – custom to our available space.

      However, the newer models at our newer campuses (who have large backstage areas) are much larger. The 4′ depth remains because no amp is any wider, but the height is what has changed. Instead of 3′ tall and stacked on op of one another, the iso boxes are each about 5′ tall and placed beside one another. That way no one has to lift their amp up high to get it in a box – they just stay at floor level. You can also fit more of your head, arms & body in the box if you want to fiddle around with amp settings or mic placement.

      The sound proofing is not science either 🙂

      We started out just using the backs & seats of old & broken chairs. Later we added Owens Corning 703, which is rigid fiberglass board used for sound absorption, which is far more inexpensive than stuff like Auralex foam.–Owens-Corning-703-Case-of-6–1004.html

      50 square feet is enough to cover the internal walls & ceiling of a 3’x4′ box like ours. Obviously you’ll need more if you build the taller box.

      One note: You will want to cover/wrap it with an inexpensive cloth to cover the fiberglass!! We used an inexpensive thick, soft, tightly woven burlap from the Yarn Barn for ours…

      As far as the fan goes – yes, it is an open hole. But it’s only about 4″ in diameter and filled with a moving fan, which actually diffuses the sound coming out the hole. The fan is a necessity, and the sound coming out of it is not a big deal in the grand scheme.


      • Reid,

        I know this is an old thread, but I think the sliding shelf is a great idea. Was it hard to do? It seems that it would be challenging to have the sliders support 90lbs of AC30 and mic stand to me-what hardware did you use?
        Finally, I was wondering why you didn’t keep that feature in the new models. Seems it would be easier to slide the shelf out and tweak settings or mic placement instead of building a bigger box and crawling inside it.
        We’re about to build some iso boxes, so we’d love any wisdom you could send our way. Thanks!

      • Andrew,

        While the slides were a great retro-fit to the old, shorter boxes (especially when they were stacked on top of one another), it just isn’t necessary with the new 4′ tall boxes. It would only be a minor convenience in contrast to the engineering and materials needed.

        With the 4′ boxes, adjusting a mic or adjusting a setting isn’t anything more than just bending over compared to crawling into a shorter box.

        If you’re stuck with a shorter box, then the sliding shelf is great – that’s the design we still use in our West Auditorium, and terrific if floor space is at a premium. But if you have the space, the simple 4′ cube is the easiest & cheapest.

  6. that’s pretty cool. – complete with dry erase board.

    i know you’re using them for backstage purposes, i wonder what the dB reduction is? i need something similar for my home studio – doesn’t have to be totally “sound proof”, but HAS to lower the dB’s substantially for lengthly home recording projects.

    • I’m not sure of the exact dB reduction – but it’s a LOT! Obviously it’s not complete, but you can have a normal conversation beside the box when an amp is being played.

      The amount & quality of the MDF and internal baffling, as well as the quality of construction (no gaps) makes a difference as well!

  7. looking to build these for a church to put an orange ad30 combo and a dr z maz 18 combo in……are the plans somewhere? This is exactly what we need…..stacked 2 high!

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