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:
    • Company: 87 dB
    • Measured: 84.7 dB (avg. 300Hz-3kHz for 2.83V measured 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.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.38 and would be 7.46 with a perfect subwoofer.
      • Details: NBD: ON 0.338, LW 0.317, SP 0.308, PIR 0.311; SM: SP0.62, PIR0.669; LFQ 0.621, LFX 43Hz
    • Tonality (Preference) Score is 6.79 with an EQ and would be 8.37 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.3, LW 0.269, SP 0.238, PIR 0.231; SM: SP0.858, PIR0.917; LFQ 0.696, LFX 33Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
Buchardt Audio S400 MKII

Vendor specifications

  • Impedance 4 Ohm
  • Size
    • Width 180mm
    • Height 365mm
    • Depth 280mm
  • Weight 7.5kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -3.5dB.
Type Freq Q Gain
PK 37.0 0.74 2.91
PK 60.0 0.76 2.89
PK 85.0 0.78 -3.8
PK 504.0 3.0 1.2
PK 1480.0 2.98 1.37
PK 8397.0 2.9 -0.98
PK 13652.0 0.89 -2.35
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.

AutomaticEQ LW (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
PK 58.0 2.67 2.92
PK 98.0 1.65 -1.24
PK 166.0 1.72 -0.71
PK 504.0 2.96 1.17
PK 1700.0 1.01 1.19
PK 5536.0 2.78 1.06
PK 11882.0 2.84 -1.1
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This EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

Quick config:
Quick config:
Quick config:
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