What we know about the measurement:

Grimani Systems Alpha is an active inwall

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • -3dB (resp. -6db) point v.s. reference is at 88.4Hz (resp. 81.4Hz).
  • Reference level is normalised to 0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.7dB over the same frequency range.
  • Tonality (Preference) Score
    • Note: The tonality (Preference) score does not make sense for inwall speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is 1.87 and would be 5.29 with a perfect subwoofer.
      • Details: NBD: ON 0.452, LW 0.405, SP 0.506, PIR 0.426; SM: SP0.197, PIR0.007; LFQ 3.348, LFX 90Hz
    • Tonality (Preference) Score is 4.18 with an EQ and would be 7.54 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.396, LW 0.372, SP 0.462, PIR 0.371; SM: SP0.82, PIR0.843; LFQ 3.348, LFX 87Hz
  • Link to Original review.
Grimani Systems Alpha
AutomaticEQ (IIR)
Set preamp gain to: -2.3dB.
Type Freq Q Gain
PK 109.0 2.99 -1.09
PK 125.0 3.0 2.91
PK 976.0 1.52 1.12
PK 3405.0 0.33 -1.68
PK 5347.0 2.39 -1.32
PK 9989.0 2.95 -1.81
PK 14633.0 1.08 -4.53
Download

These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Grimani Systems Alpha filters_auto_eq

AutomaticEQ

Grimani Systems Alpha filters_eq_full

Target v.s. EQ

Grimani Systems Alpha
Graphic EQ 15 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
PK 25.0 2.14 0.0
PK 40.0 2.14 0.0
PK 63.0 2.14 0.5
PK 100.0 2.14 0.25
PK 160.0 2.14 0.25
PK 250.0 2.14 0.5
PK 400.0 2.14 0.25
PK 630.0 2.14 0.25
PK 1000.0 2.14 0.5
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 -0.25
PK 10000.0 2.14 -0.5
PK 16000.0 2.14 -0.5
Download

These EQ is designed for a 15 bands graphical EQ.

Grimani Systems Alpha
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.0
PK 31.0 4.32 0.0
PK 40.0 4.32 0.0
PK 50.0 4.32 0.5
PK 63.0 4.32 0.5
PK 80.0 4.32 0.5
PK 100.0 4.32 0.25
PK 125.0 4.32 0.5
PK 160.0 4.32 0.25
PK 200.0 4.32 0.25
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 0.0
PK 630.0 4.32 0.25
PK 800.0 4.32 0.25
PK 1000.0 4.32 0.25
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 -0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 -0.5
PK 10000.0 4.32 -0.5
PK 12000.0 4.32 -0.5
PK 16000.0 4.32 -0.5
PK 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Grimani Systems Alpha: comparison between EQs
Grimani Systems Alpha

Comparison betweens various EQs

Grimani Systems Alpha

Improvements made by EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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