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BBC A10 bass trap
Old 4th September 2011
Here for the gear

BBC A10 bass trap

Hey All,

The AVSForum guys said that quite a few people have built the BBC A10 bass traps. I searched quite a bit on this sub-forum but couldn't find a lot of detailed info or build threads.

I have a massive 60-65 hz bass null at the seating position in my room (which makes sense given the 18.5' room length).

There isn't a lack of bass in general, and if I move the spl meter forward or backward 4' from the seating position, I gain 15db at 63hz

Since the bass spl is very high on the back wall (+15-20db), i'd think a pressure based membrane absorber would be ideal.

To add a bit more info: I have 3 super chunks up front (2x wall/wall, 1x ceiling/wall). No other traps. I've got a Behringer FDP to eq the subs, but I don't want to go the eq path until the room response is a bit flatter.

What are your experiences with these traps? I have enough depth to sacrifice the 7.5" or so that it would take to put them up. I figured that putting 2' tall 7.5" deep broadband panels at ear height with the A10s above and below them should do a good job of reducing the null.

Someone telling me I'm wrong before I spend a week building them is also appreciated of course

Thanks in advance!
Old 6th September 2011
Gear Guru
Glenn Kuras's Avatar
We actually do custom tuned trapping so I can give you a bit of insight. First of all they work, but they are a bit tricky. First what you calculate and what actually works can be pretty far off. Also if the trap is not built totally right you have wasted a lot of time and effort and have nothing to show for it. If you do not have the woodworking skills (with tools) I would stick with thick broad band. Here is a room that was treated with 100% broad band. I thick you would agree that not only does the testing look good but the before and after of the recorded music sounds good. Could tuned traps help this room? I would think so but.........................

GIK Acoustics. Treated and untreated listening room video.
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