Main speakers reproduce the recording
A14-M through A25-M, A214-M and A215-M are active loudspeakers with built-in amplification. A23-M and A25-M use a dedicated midrange in a three-way layout; the other listed main and centre models use two-way layouts.
Select a cabinet and output capability suited to the listening distance and level you need. Larger specifications do not establish a better result in every room, and a manufacturer's peak SPL figure is not continuous output at your seat.
A subwoofer adds a low-frequency sound source
Sub A125-M and Sub A225-M reproduce the bass content of a supplied audio signal. A225-M offers a larger dual-driver enclosure; A125-M is the more compact option. Both need a suitable signal route and coordinated settings.
Adding output can also change how the system excites room resonances. Check level, crossover, polarity or phase where the system permits, and placement. A deep cancellation dip should be investigated before trying to fill it with more output.
AVAA absorbs acoustic energy
AVAA C214 and C225 operate independently of the music signal path. They absorb low-frequency energy in their operating bands. They do not supply a soundtrack's LFE channel or extend the bass response by reproducing missing notes.
C214 operates from 15 to 160 Hz; C225 from 12 to 130 Hz, with higher operating sound-pressure capacity. Those are operating specifications, not guaranteed reductions in decibels. Model, quantity and position need to follow the actual room problem.
EQ and absorption act in different places
EQ changes the electrical playback signal. Passive and active absorption work on sound energy in the room. They can complement each other, but owning a room-correction processor neither proves nor rules out a need for absorption.
Compare response and decay with the same source, listening positions and level. A change in loudness or seat can make a comparison misleading. Factory loudspeaker calibration does not replace these room checks.
Start with what you hear
For limited extension, examine the main speakers and the case for a properly integrated subwoofer. For lingering bass, investigate decay and possible absorption. For uneven bass across seats, investigate placement and interaction between sources and the room before selecting equipment.
Our C214 measured case documents one room under stated conditions. It is useful evidence of that comparison, not a forecast for another room. Supply, audition and measurement arrangements are confirmed individually.
Sources and next steps
Manufacturer information checked 13 October 2026: A23-M, Sub A225-M and the official references linked on our AVAA C214 and AVAA C225 pages. MSN Audio sells PSI Audio products.
Browse the PSI Audio range and use a model enquiry to tell us what you want to improve. Your current equipment and approximate listening distance help us discuss suitability. Add a preferred finish or quantity if you already have one in mind.