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
PK 84.0 1.12 2.99
PK 187.0 0.26 2.94
PK 229.0 1.63 -2.54
PK 547.0 2.37 -2.64
PK 1220.0 1.7 -2.2
PK 1541.0 2.29 2.8
PK 2014.0 2.5 -2.95
PK 3110.0 0.78 -2.71
LS 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
PK 25.0 2.14 0.25
PK 40.0 2.14 0.25
PK 63.0 2.14 0.25
PK 100.0 2.14 0.25
PK 160.0 2.14 0.25
PK 250.0 2.14 0.0
PK 400.0 2.14 0.25
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 -0.75
PK 4000.0 2.14 -0.5
PK 6300.0 2.14 -0.5
PK 10000.0 2.14 -0.25
PK 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
PK 20.0 4.32 0.0
PK 25.0 4.32 0.25
PK 31.0 4.32 0.25
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 -0.5
PK 100.0 4.32 0.25
PK 125.0 4.32 0.25
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 0.5
PK 500.0 4.32 0.25
PK 630.0 4.32 0.25
PK 800.0 4.32 0.25
PK 1000.0 4.32 0.0
PK 1250.0 4.32 -0.25
PK 1600.0 4.32 0.25
PK 2000.0 4.32 -0.5
PK 2500.0 4.32 -0.5
PK 3150.0 4.32 -0.5
PK 4000.0 4.32 -0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 0.0
PK 8000.0 4.32 0.0
PK 10000.0 4.32 0.0
PK 12000.0 4.32 0.0
PK 16000.0 4.32 -0.25
PK 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
Frequency Frequency with EQ
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