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Revolutionary PSI AVAA C20 Active Bass Trap. Case
« on: January 22nd, 2018, 9:27am »
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PSI Switzerland AVAA C20 ACTIVE Bass Trap
More infos : https://www.psiaudio.com/en/our-products/avaa-c20-active-bass-tr
ap/
Contact Us for Showroom Demos or Home Demo Arrangements ! (Transport Fees apply for Home Demo)
Case Study 1. Floorstander speakers in Small Room.
Customer using a pair of Penaudio floorstander in Typical small hifi room 3m x 4m. Before using PSI active bass traps keeps having bass boom and poor bass texturing issues. After installing 2 PSI AVAA Active bass traps (corner behind speakers), the Bass Boom issue is SOLVED ! With improved bass texturing and definition, so much better mid range and high frequency clarity as well!
Case Study 2 Hifi setup in typical Living room. 90% of Hifi Kaki in SG will have this problem.
Below is a typical living room hifi setup in Singapore. On the left side of the setup is the closed end (wall or window). While on the right side opens up to a dinner area or corridor. This non-symmetrical setup cause bass issues as it bounces off the corner of the closed end, causing boom, bass muddiness and lost of details in mid/high due to smearing of the bass.
 
We install the PSI active bass trap, 1 unit, into the closed end, behind the speakers.
The result is so much better. Bass Boom is reduced drastically and bass texturing improves dramatically too. The clean up of the bass improves the mids, and highs as well, improving soundstage and PRaT. Musical and energetic sound! Best of all, unless Passive bass trap (which is very big for typical room nodes of 40hz to 60hz, and absorb mid/high frequencies and harmonics of music, giving a dead, dry, overdamped and lifeless sound), the PSI ACTIVE Bass Trap only works in Bass region (15hz till 150Hz only, with built in measurement mike), small in size (WAF !!) and does not absorb mid-high for natural sound! Now customer can finally play way down deep with his big speakers!
Case study 3. Dedicatedly built HIFI ROOM (BIG !) in landed Property using PSI Active Bass Trap to improve bass performance.
This customer has a dedicatedly built hifi room with huge dimensions. Still benefit TREMENDOUSLY from PSI Active bass trap, that improves bass performance from 15Hz subsonic to 150Hz. 2 are installed at the corner of the room. There is simply no passive solution for bass issues from 50hz down (most passive bass traps stops at 50hz range at best, and due to their absorptive materials, also suck up important mid range and high frequency, giving a dead sound). After the installation of the bass traps, the customer feedback much improved clarity over the full range, much better bass texturing and details. The vocals diction is so much clearer as well.
  
Below are Other Actual Users of PSI AVAA C20 Active Bass Traps in Singapore. In all cases, it trumps their existing bass improvement solutions! The correct treatment of the bass removes bass smearing effect, improving mids and highs, increasing resolution, musicality and sound stage in the process! Have to try to believe.
 
 
 
“My review in Stereophile has been published in the June issue! I wish I had had more pages to describe the virtues of the AVAA. It’s amazing the precision, beauty, tightness and control of the bass in my mastering room, thanks to PSI Audio.” – Bob Katz
From Switzerland PSI (highest standard in studio and broadcast speakers) with 40 years of broadcast studio equipment design and manufacture (https://www.psiaudio.com/en/our-story/) comes the amazing AVAA C20 active bass trap!
If you are suffering from bass issues (bass/mid-bass boom, muddiness of bass, low quality of bass texture etc) and wish for an elegant, high WAF, small sized and easy to use solution that is amazing effective, and DOES NOT affect mid-range and high frequency performance like conventional passive bass trap, this is it!
AVAA (Active Velocity Acoustic Absorber) works like an active bass trap and is the solution for room mode problems between 15 – 120 Hz.
Key points:
•The AVAA absorbs room modes between 15 and 150 Hz
•MUCH smaller in size and Better performance than passive bass trap that works between 15Hz and 150Hz
•Does not absorb mid and high frequency like passive bass traps, that over-damp the sound.
•No setting are required only ON/OFF
•It can easily be moved into a different room
What does the AVAA do?
The AVAA is a solution for room mode problems.
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.
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 between15 and 150 Hz and is most effective on room modes that are the result of multiple reflections.
What effect will the AVAA have in my room?
The AVAA will have the same effect, on frequencies from 15 to 150 Hz, as opening a window about 5 to 20 times the size of the AVAA. This will impact sound in the time, frequency and space dimensions.
•Time: it will significantly reduce reverberation time in these frequencies especially on room modes.
•Frequency: with more precise and tighter bass, the masking effect of higher frequencies is reduced. Details in higher frequencies also become clearer.
•Space: with less indirect sound in the room, the location of the sound is more accurate making the sound image more precise.
Where to place the AVAAs in a room?
The most effective position for the AVAA is in a location where the walls contribute most to the room modes that are disturbing in the listening position. In practice it is very easy to position the AVAA effectively after a few comparative trials.
The starting position is in corners behind the source speakers as this is the most effective position in a majority of cases. However, depending on the structure of the room boundaries and listening position, other AVAA locations might turn out to be more effective. Try positioning them in different corner or against walls and evaluate effectiveness.
In practice it is quick and easy finding the best location by following the basic rules:
•AVAAs positioned in corners are more effective
•AVAAs located against rigid walls are more effective
Bear in mind that the AVAA is designed to absorb long wavelengths and therefore there is little very little to gain by positioning the AVAA with great precision.
Contact Us for Showroom Demos or Home Demo Arrangements ! (Transport Fees apply for Home Demo)
PSI AVAA C20 Active Bass Trap. Black or White Color. List Price SGD$ 3900 each.
Contact us for more details!
James Soh.
Tel : 9694 9704. (11am to 7pm, Monday to Saturday. Do call before coming over as I could be out for installation. Other times by appointment basis.).
Sound Affairs Pte Ltd
www.mysoundaffairs.com
100 beach road, Shaw tower. #02-34. S189702
Email : sales@mysoundaffairs.com
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