Notice

Warning

We have multiple measurements for this speaker. Click here to see the default one (which is higher quality if we have one measurement better than the others).

What we know about the measurement:

PSI Audio A21-M is an active bookshelves that cost around 3100 USD each.

  • Quality of the measurement data is low.
  • Origin of the data is Sound and Recording.
  • Format of the data is a scanned image .
  • -3dB (resp. -6db) point v.s. reference is at 36.5Hz (resp. 33.6Hz).
  • Reference level is normalised to 0.6dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.7dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.14 and would be 7.76 with a perfect subwoofer.
      • Details: NBD: ON 0.304, LW 0.356, SP 0.448, PIR 0.376; SM: SP0.911, PIR0.848; LFQ 1.923, LFX 34Hz
    • Tonality (Preference) Score is 7.17 with an EQ and would be 8.7 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.19, LW 0.219, SP 0.333, PIR 0.239; SM: SP0.965, PIR0.953; LFQ 1.838, LFX 32Hz
  • Link to Original review.
  • Vendor specifications:
    • Dispersion: 80° horizontal and 30° vertical.
    • SPL
      • max: 106 dB
      • peak: 121 dB
    • Size
      • Width 250mm
      • Height 400mm
      • Depth 300mm
    • Weight 12.8kg
PSI Audio A21-M
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
PK 26.0 1.0 2.96
PK 121.0 1.65 1.52
PK 293.0 6.0 -1.14
PK 426.0 5.73 -1.09
PK 719.0 5.68 2.19
PK 3097.0 4.41 -1.72
PK 6744.0 6.0 -1.19
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
PSI Audio A21-M
Graphic EQ 15 bands
Set preamp gain to: -0.5dB.
Type Freq Q Gain
PK 25.0 2.14 0.25
PK 40.0 2.14 0.0
PK 63.0 2.14 0.0
PK 100.0 2.14 0.0
PK 160.0 2.14 0.0
PK 250.0 2.14 -0.25
PK 400.0 2.14 0.0
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.0
PK 1600.0 2.14 0.0
PK 2500.0 2.14 0.0
PK 4000.0 2.14 0.25
PK 6300.0 2.14 0.0
PK 10000.0 2.14 0.25
PK 16000.0 2.14 0.5
Download
This EQ is designed for a 15 bands graphical EQ.
PSI Audio A21-M
Graphic EQ 31 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.5
PK 31.0 4.32 0.5
PK 40.0 4.32 0.25
PK 50.0 4.32 -0.25
PK 63.0 4.32 -0.25
PK 80.0 4.32 0.0
PK 100.0 4.32 0.0
PK 125.0 4.32 0.0
PK 160.0 4.32 0.0
PK 200.0 4.32 0.0
PK 250.0 4.32 -0.25
PK 315.0 4.32 -0.25
PK 400.0 4.32 -0.25
PK 500.0 4.32 -0.25
PK 630.0 4.32 0.0
PK 800.0 4.32 0.25
PK 1000.0 4.32 0.0
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.0
PK 2000.0 4.32 0.0
PK 2500.0 4.32 0.25
PK 3150.0 4.32 -0.25
PK 4000.0 4.32 0.0
PK 5000.0 4.32 0.0
PK 6300.0 4.32 0.0
PK 8000.0 4.32 0.25
PK 10000.0 4.32 0.25
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.5
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
PSI Audio A21-M: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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