Description
PSI Audio AVAA C20 – Active Bass Trap
AVAA C20
Analog active bass trap
Unique: easy to set up and move, no calibration required, as efficient as passive absorbers 25 times its size, the AVAA C20 typically reduces the resonance time of all room modes between 15 Hz and 150 Hz by up to 50%.
Working from 15Hz to 150Hz
Whether you have 1, 2, 3 or more disturbing room modes, the AVAA C20 will work on all of them. It will absorb all undesired room modes.
AVAA is a revolution
Since its release in 2016, AVAA has grown a reputation of being the secret weapon of the acoustic treatments and a revolution in room acoustics. In 2023, the active acoustic treatment is also done digitally with the AVAA C214.
No calibration required
Simply place it where your room modes are and it will absorb them. No calibration required.
The AVAA is designed to absorb the standing modes between 15 and 150 Hz in a room. It will do so just like passive absorbers but in a much more efficient way and using up much less space. Each operating AVAA will have the same effect as a hole in the wall much larger than the dimensions of the AVAA (that is 0.2 m2). The exact ratio will depend on the frequency and environment but typically range between 5 and 20.
The AVAA will affect the impedance of the air and “suck” low frequencies around it.
Therefore the best position to place an AVAA is in the most rigid corners as that is where all room modes will be most present.
It is important to work on the positioning of loudspeakers and listening, as the AVAA will have little effect on inevitable first reflections.
A microphone will measure the acoustic pressure in front of an acoustic resistance.
The acoustic resistance is designed to let air through but reducing significantly the pressure.
Behind the acoustic resistance, a transducer membrane is driven to absorb the volume of air going through the acoustic resistance as well as ensuring a specific acoustic impedance in front of this acoustic resistance.
When in function, this acoustic impedance in front of the acoustic resistance is significantly lower than in ambient air and therefore acts as a pressure sink.
The acoustic impedance of the air is affected typically over a radius of 1 to 1.5 m around the AVAA. This explains how the AVAA can be more absorbent that its actual surface of perfect absorber.
It is designed to absorb frequencies between15 and 150 Hz and is most effective on room modes that are the result of multiple reflections.
Features:
- The AVAA absorbs room modes between 15 and 150 Hz
- 100% ANALOG, no DSP, no latency
- Effective as perfect absorber up to 25 times its size
- No calibration or settings are required
- No sound emitted and no alteration of the sound source
- 2 AVAAs will make a significant difference in normal sized studios
- Works in any type of room: recording, mixing, mastering, listening
