What we know about the measurement:

Buchardt Audio S400 MKII is a passive bookshelves that cost around 2250 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 85.2dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 60.1Hz (resp. 47.6Hz).
  • Reference level is normalised to 0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.6dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.36 and would be 7.43 with a perfect subwoofer.
      • Details: NBD: ON 0.338, LW 0.317, SP 0.308, PIR 0.311; SM: SP0.846, PIR0.659; LFQ 0.621, LFX 43Hz
    • Tonality (Preference) Score is 6.84 with an EQ and would be 8.42 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.3, LW 0.269, SP 0.238, PIR 0.231; SM: SP0.962, PIR0.94; LFQ 0.696, LFX 33Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
  • Vendor specifications:
    • Sensitivity 87 dB
    • Impedance 4 Ohm
    • Size
      • Width 180mm
      • Height 365mm
      • Depth 280 mm)
    • Weight 7.5 kg
Buchardt Audio S400 MKII
AutomaticEQ (IIR)
Set preamp gain to: -3.5dB.
Type Freq Q Gain
3 37.0 0.74 2.91
3 60.0 0.76 2.89
3 85.0 0.78 -3.8
3 504.0 3.0 1.2
3 1480.0 2.98 1.37
3 8397.0 2.9 -0.98
3 13652.0 0.89 -2.35
Download

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

Buchardt Audio S400 MKII filters_auto_eq

AutomaticEQ

Buchardt Audio S400 MKII filters_eq_full

Target v.s. EQ

Buchardt Audio S400 MKII
AutomaticEQ LW (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
3 58.0 2.67 2.92
3 98.0 1.65 -1.24
3 166.0 1.72 -0.71
3 504.0 2.96 1.17
3 1700.0 1.01 1.19
3 5536.0 2.78 1.06
3 11882.0 2.84 -1.1
Download

These EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

Buchardt Audio S400 MKII: comparison between EQs
Buchardt Audio S400 MKII

Comparison betweens various EQs

Buchardt Audio S400 MKII

Improvements made by EQ

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