TA21
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PSI Audio, a Swiss audio company that mostly does pro audio gear, makes active bass traps that absorb standing modes in a room from 15Hz to 160Hz.
Their original model, the AVAA C20, came out in 2016. They came out with a newer, DSP-based model in 2023, the AVAA C214. These active bass traps are not noise cancellation devices.
Some reviews do show measurements of the effect of the C214 bass traps. Like Tom Martin's YouTube video for The Absolute Sound.
The most measurements are in Acoustics Insider's video last month, about using the PSI AVAA C214 active bass traps in ten different rooms. Positive effects in nine of the rooms, and ineffective in one room - he attributes that to structural issues with the room, which does not have enough sound pressure for the AVAA to work with. In the ten rooms, he found an average reduction of 0.5 seconds in decay time for primary room modes, and a typical reduction of 1dB to 5dB to peaks. Also interesting is how the AVAA seem to reduce nulls, and not just peaks. The video description has link to download measurements and photos of all ten room tested. That channel also posted a follow-up video, interviewing some owners of those rooms to discuss their experience. (That channel focuses more on setting up mixing studios, so the rooms were already acoustically treated by the owners.)
The units are not inexpensive: one C214 unit is $3,950 in the US, €3,290 in the EU. And they recommend using at least two units.
(There is a very old thread on the AVAA in the Audio Industry Forum. I thought a new thread in the General forum might get more feedback from people who have used this.)
Their original model, the AVAA C20, came out in 2016. They came out with a newer, DSP-based model in 2023, the AVAA C214. These active bass traps are not noise cancellation devices.
Some reviews do show measurements of the effect of the C214 bass traps. Like Tom Martin's YouTube video for The Absolute Sound.
The most measurements are in Acoustics Insider's video last month, about using the PSI AVAA C214 active bass traps in ten different rooms. Positive effects in nine of the rooms, and ineffective in one room - he attributes that to structural issues with the room, which does not have enough sound pressure for the AVAA to work with. In the ten rooms, he found an average reduction of 0.5 seconds in decay time for primary room modes, and a typical reduction of 1dB to 5dB to peaks. Also interesting is how the AVAA seem to reduce nulls, and not just peaks. The video description has link to download measurements and photos of all ten room tested. That channel also posted a follow-up video, interviewing some owners of those rooms to discuss their experience. (That channel focuses more on setting up mixing studios, so the rooms were already acoustically treated by the owners.)
The units are not inexpensive: one C214 unit is $3,950 in the US, €3,290 in the EU. And they recommend using at least two units.
(There is a very old thread on the AVAA in the Audio Industry Forum. I thought a new thread in the General forum might get more feedback from people who have used this.)
