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

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 39.6Hz (resp. 35.2Hz).
  • Reference level is normalised to 0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.2dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.1 and would be 7.76 with a perfect subwoofer.
      • Details: NBD: ON 0.358, LW 0.337, SP 0.389, PIR 0.31; SM: SP0.915, PIR0.82; LFQ 0.96, LFX 35Hz
    • Tonality (Preference) Score is 5.98 with an EQ and would be 7.56 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.409, LW 0.372, SP 0.4, PIR 0.343; SM: SP0.924, PIR0.828; LFQ 0.839, LFX 33Hz
  • Link to original Review: asr review. Links to other reviews: snr review .
PSI Audio A21-M

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

Directivity (-6dB)

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
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.
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
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This EQ is designed for a 15 bands graphical EQ.
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.
Quick config:
Quick config:
Quick config:
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