All PSI Audio monitors have similar frequency and phase response and therefore can be mixed and matched in any multichannel system.
The advantages of a bigger monitor compared to a smaller one are the following:

  • More powerful with higher sound pressure level output
  • Lower frequencies can be reached
  • Higher accuracy with tighter tolerances

So the choice of one monitors or another should be made taking into considerations:

  • Listening distance
  • Desired bandwidth
  • Accuracy of monitor


However the following rule of thumb can be used

Monitor Listening Distance Typical room size Typical use
A14-M 0.5 to 1 m Up to 15 m2 When space is limited such as offsite broadcasting vehicles.
Accurate transportable monitor.
Multichannel system.
A17-M 1 to 1.5 m 10 to 25 m2 Powerful accurate sound reproduction.
Small studios, home studio
A21-M 1.5 to 2 m 15 to 35 m2 Medium sized rooms and when high accuracy is needed.
Production, mastering, mixing
A25-M 2 to 3 m 20 to 50 m2 Large rooms when sound accuracy is paramound
A215-M 1.5 to 3 m 15 to 25 m2 Floorstanding monitor.
Larger rooms with less treatmentMastering and listening situationsHifi
A214-M 1.5 to 3 m 15 to 25 m2 Central speaker in multichannel setup.
Can easily be placed underneath a screen