
In the world of acoustic treatment, precision and performance are key to achieving a balanced and immersive listening environment. In this project, we put four AVAA C214 units to the test in a completely untreated room to explore their impact on low-frequency control and time-domain performance. The AVAAs were carefully positioned based on an in-depth analysis of room modes, pressure zones, and real-time measurement data. This scientific approach allowed us to target specific problem areas in the room, including standing waves and low-frequency ringing, while refining the placement for optimal results.
Using real-time data and iterative experimentation, we placed the AVAAs in the front and rear corners and centrally between the speakers. This strategic setup aimed to minimize destructive interferences and improve low-frequency coherence. The experiment not only revealed dramatic improvements in frequency response and group delay but also provided insights into the unmasking effect—allowing mid and high frequencies to 'breathe' more freely as sub-frequency issues were mitigated.
This blog/article explores the detailed results of this experiment, highlighting the transformative power of AVAAs when integrated into a room with no prior acoustic treatment. While already impressive, the performance of these units can be enhanced even further when combined with proper acoustic treatment to manage reflections and reverberation. Read on to discover how this combination of science and technology can redefine room acoustics.

Precision Placement: The Power of 4 AVAA C214s in Action!
Frequency Response Transformation: Before and After 4 AVAA C214 Units
In this experiment, we compared the frequency response of the room before and after deploying the 4 AVAA C214 units. The results were striking, with noticeable improvements in the overall balance and smoothness of the frequency spectrum.

1. Before AVAA Deployment (Client Setup):The initial frequency response revealed significant peaks and dips, characteristic of strong room modes and interferences. These anomalies, particularly in the low-frequency range below 200 Hz, caused boomy and uneven bass, making the listening experience less accurate. Such issues are common in untreated rooms, where standing waves and pressure build-ups dominate the acoustics.

2. After AVAA Deployment (Corsini Setup):The frequency response after deploying the 4 AVAA C214 units exhibited a much smoother profile. Large peaks were reduced, and nulls were filled in, resulting in a more balanced representation of the low-frequency spectrum. This smoother response is a direct result of the AVAA units addressing the room's dominant modes by actively reducing low-frequency pressure variations.
Key Improvements Observed:
Reduction of Low-Frequency Peaks: Peaks at critical frequencies (e.g., 30–40 Hz and 50-60 Hz) were significantly tamed, reducing the "boomy" character of the room.
Smoothing of Dips (Nulls):Â Frequency dips caused by destructive interference were minimized, leading to more consistent bass reproduction across the spectrum.
Improved Uniformity:Â The response curve became more linear, providing a balanced foundation for critical listening or mixing.

Conclusion:These improvements underline the capability of AVAA units to deliver a more accurate frequency response by directly targeting the room's low-frequency challenges. While the results are already impressive, combining this with additional acoustic treatment would address mid and high-frequency reflections, further enhancing clarity and precision in the room's acoustics.
Spectrogram Analysis: Revealing the Impact of 4 AVAA C214 Units




The spectrogram analysis provides a visual representation of the room's acoustic behavior before and after deploying 4 AVAA C214 units. Prior to the deployment, the spectrogram revealed prolonged energy decay in the low frequencies, with dominant blue and green tones indicating excessive ringing and boominess. This excessive decay masked the clarity of mid and high frequencies, leading to a congested and imbalanced sound.
Post-deployment, the spectrogram displayed a significant reduction in low-frequency ringing, with shorter decay times and a shift towards more pronounced yellow and red tones across the entire frequency range. This improvement reflects the AVAA units' ability to neutralize standing waves and stabilize pressure zones, effectively unmasking mid and high frequencies. The result is a clearer, more transparent soundstage, free from the overbearing effects of uncontrolled low-end energy.
This analysis underscores how AVAA units, when strategically placed, can transform a room's acoustic environment, making it more suitable for critical listening or production. The improvements would be even more pronounced with the addition of acoustic treatment to further manage reflections and reverberation.
Peak Energy Time Trace

This spectrogram shows the room's behavior before deploying 4 AVAA C214 units. The dashed line represents the Peak Energy Time Trace, highlighting variations in peak energy arrival times across different frequencies. Notice the irregular and fluctuating line, especially in the low-frequency range below 200 Hz. These variations indicate inconsistent energy propagation, leading to prolonged ringing and smearing in the bass region. Such irregularities contribute to a congested and unbalanced soundstage.

Group Delay: Enhancing Low-Frequency Precision with 4 AVAA C214 Units





Conclusion
This experiment highlights the transformative impact of 4 AVAA C214 units on a completely untreated room. By strategically positioning the AVAAs using real-time data and analyzing room modes and pressure zones, we achieved significant improvements in frequency response, group delay, and time-domain performance. The spectrograms and group delay graphs clearly demonstrate reduced low-frequency ringing, smoother energy propagation, and enhanced mid and high-frequency clarity.
While these results are remarkable on their own, the AVAA C214 units perform even better when paired with acoustic treatment to manage reflections and reverberation. This combination ensures a fully optimized listening or mixing environment with precise low-frequency control and an immersive soundstage.
If you're looking to elevate your room's acoustics, the PSI Audio AVAA C214Â is a powerful solution, and we highly recommend incorporating it into your setup. For more details and to purchase the AVAA C214, visit the product page on the Corsini Acoustic Solutions website: AVAA C214.
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