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
3 109.0 2.99 -1.09
3 125.0 3.0 2.91
3 976.0 1.52 1.12
3 3405.0 0.33 -1.68
3 5347.0 2.39 -1.32
3 9989.0 2.95 -1.81
3 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
3 25.0 2.14 0.0
3 40.0 2.14 0.0
3 63.0 2.14 0.5
3 100.0 2.14 0.25
3 160.0 2.14 0.25
3 250.0 2.14 0.5
3 400.0 2.14 0.25
3 630.0 2.14 0.25
3 1000.0 2.14 0.5
3 1600.0 2.14 0.0
3 2500.0 2.14 0.0
3 4000.0 2.14 -0.25
3 6300.0 2.14 -0.25
3 10000.0 2.14 -0.5
3 16000.0 2.14 -0.5
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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
3 20.0 4.32 0.0
3 25.0 4.32 0.0
3 31.0 4.32 0.0
3 40.0 4.32 0.0
3 50.0 4.32 0.5
3 63.0 4.32 0.5
3 80.0 4.32 0.5
3 100.0 4.32 0.25
3 125.0 4.32 0.5
3 160.0 4.32 0.25
3 200.0 4.32 0.25
3 250.0 4.32 0.25
3 315.0 4.32 0.25
3 400.0 4.32 0.25
3 500.0 4.32 0.0
3 630.0 4.32 0.25
3 800.0 4.32 0.25
3 1000.0 4.32 0.25
3 1250.0 4.32 0.0
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
3 2500.0 4.32 -0.25
3 3150.0 4.32 -0.25
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.25
3 6300.0 4.32 -0.25
3 8000.0 4.32 -0.5
3 10000.0 4.32 -0.5
3 12000.0 4.32 -0.5
3 16000.0 4.32 -0.5
3 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
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