PSI Audio AVAA C20 - Active Velocity Acoustic Absorber 2021 - Graphite Black

PSI AVAA C20 - Graphite Black
This sale is for two PSA AVAA C20's. These active bass traps do an amazing job at addressing and minimizing low frequency standing waves in your room while adding amazing clarity to the mid-range as an added bonus!

It just makes sense that if you fix an issue at 35 Hz then things get clearer at 350Hz , 3500 etc. as you go up and down the octaves.

These active velocity acoustic absorbers are designed to absorb the standing modes between 15 and 150 Hz in a room. In Excellent physical and working condition. No issues at all!

I am the original owner. Kept in smoke free control room. I have all the original boxes and packaging and will ship out exactly how they were shipped to me by the mfg.

Active bass trap - tightens low end, increases translation. Price is per unit. I have 3 units available. 

The PSI AVAA C20 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.

How does it work?

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 between 15 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