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Old 19th November 2012, 05:28 PM   #1
Doug47 is offline Doug47  United States
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Question Port Blocking

I am working on a design for a TL subwoofer. One aspect common to all of the designs is a rectangular port from 1-4" tall by 8.5" wide (depending on which design). Now for most of the designs, the port will be quite a distance from the speakers, so I won't be able to use the speaker grills to cover the port (more so if the port is on the back). I have a quite curious cat (actually, it's my daughter's but...) that might be able to actually fit in the port .

What are some suggestions as to methods of blocking the port from curious hands/objects (like grandkids and their toys) or curious animals? I don't want to have to fish a favorite toy out of my speaker or worse, have to fish an animal out of it. What materials would block such incursions yet allow for free airflow so it doesn't change the output of the speaker? Most designs I see on the site seem to just leave it open (I guess they don't have such animals or small children).
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Old 19th November 2012, 06:53 PM   #2
weltersys is online now weltersys  United States
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Hardware cloth, chicken wire, perforated panel all work. Perf panel looks the best, but even the type with 80% open will change the tuning a bit.
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Old 19th November 2012, 08:37 PM   #3
Cal Weldon is offline Cal Weldon  Canada
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Port Blocking
Mini electric fence.
planet10 needs your help:
Let's help Ruth and Dave
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Old 19th November 2012, 08:44 PM   #4
Djim is offline Djim  Netherlands
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Last edited by Djim; 19th November 2012 at 08:46 PM.
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Old 19th November 2012, 08:53 PM   #5
Doug47 is offline Doug47  United States
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Originally Posted by Cal Weldon View Post
Mini electric fence.
I like that one! I guess that's a reason to go with an electrostatic speaker. You already have high voltage around to use to keep animals/hands/ kids out of your speakers...
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Old 20th November 2012, 12:42 PM   #6
Shadydave is offline Shadydave  United States
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Location: Appalachia, in the middle of nowhere.
I had to cover the drivers in a floor firing coffee table's 2 -12" drivers with 1/4" mesh hardware cloth.
I used plywood rings like isobaric spacers/mounts to clamp the hardware cloth and allow clearance for the speaker travel.
That kept the kittens from playing push-push on the drivers.

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