What we know about the measurement:

M-Audio BX4 D3 is an active bookshelves that cost around 120 USD each.

  • Quality of the measurement data is medium.
  • Origin of the data is Misc.
  • Format of the data is .
  • -3dB (resp. -6db) point v.s. reference is at 67.3Hz (resp. 63.5Hz).
  • Reference level is normalised to 0.6dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.9dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 2.49 and would be 5.23 with a perfect subwoofer.
      • Details: NBD: ON 0.618, LW 0.546, SP 0.499, PIR 0.513; SM: SP0.819, PIR0.268; LFQ 0.24, LFX 62Hz
    • Tonality (Preference) Score is 4.55 with an EQ and would be 7.12 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.509, LW 0.437, SP 0.474, PIR 0.428; SM: SP0.924, PIR0.859; LFQ 0.24, LFX 57Hz
  • Link to original Review: asr review. .
M-Audio BX4 D3
AutomaticEQ (IIR)
Set preamp gain to: -8.2dB.
Type Freq Q Gain
3 84.0 1.12 2.99
3 187.0 0.26 2.94
3 229.0 1.63 -2.54
3 547.0 2.37 -2.64
3 1220.0 1.7 -2.2
3 1541.0 2.29 2.8
3 2014.0 2.5 -2.95
3 3110.0 0.78 -2.71
5 4803.0 1.26 2.99
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

M-Audio BX4 D3 filters_auto_eq

AutomaticEQ

M-Audio BX4 D3 filters_eq_full

Target v.s. EQ

M-Audio BX4 D3
Graphic EQ 15 bands
Set preamp gain to: -0.4dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.25
3 100.0 2.14 0.25
3 160.0 2.14 0.25
3 250.0 2.14 0.0
3 400.0 2.14 0.25
3 630.0 2.14 0.0
3 1000.0 2.14 0.0
3 1600.0 2.14 0.0
3 2500.0 2.14 -0.75
3 4000.0 2.14 -0.5
3 6300.0 2.14 -0.5
3 10000.0 2.14 -0.25
3 16000.0 2.14 -0.5
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These EQ is designed for a 15 bands graphical EQ.

M-Audio BX4 D3
Graphic EQ 31 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.25
3 31.0 4.32 0.25
3 40.0 4.32 0.25
3 50.0 4.32 0.25
3 63.0 4.32 0.25
3 80.0 4.32 -0.5
3 100.0 4.32 0.25
3 125.0 4.32 0.25
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 0.5
3 500.0 4.32 0.25
3 630.0 4.32 0.25
3 800.0 4.32 0.25
3 1000.0 4.32 0.0
3 1250.0 4.32 -0.25
3 1600.0 4.32 0.25
3 2000.0 4.32 -0.5
3 2500.0 4.32 -0.5
3 3150.0 4.32 -0.5
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.25
3 6300.0 4.32 0.0
3 8000.0 4.32 0.0
3 10000.0 4.32 0.0
3 12000.0 4.32 0.0
3 16000.0 4.32 -0.25
3 20000.0 4.32 0.0
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These EQ is designed for a 31 bands graphical EQ.

M-Audio BX4 D3: comparison between EQs
M-Audio BX4 D3

Comparison betweens various EQs

M-Audio BX4 D3

Improvements made by EQ

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