XTZ Spirit 4 is a passive bookshelves that cost around 477 USD for a pair.

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • Sensitivity:
    • Company: 86 dB
    • Measured: 78.6 dB (avg. 300Hz-3kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 49.7Hz (resp. 44.9Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.4dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.41 and would be 6.53 with a perfect subwoofer.
      • Details: NBD: ON 0.627, LW 0.537, SP 0.455, PIR 0.466; SM: SP0.89, PIR0.778; LFQ 0.886, LFX 44Hz
    • Tonality (Preference) Score is 5.98 with an EQ and would be 7.93 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.408, LW 0.319, SP 0.291, PIR 0.263; SM: SP0.94, PIR0.886; LFQ 0.886, LFX 41Hz
  • Link to original Review: asr review. .
XTZ Spirit 4

Vendor specifications

  • Impedance 4 Ohm
  • Size
    • Width 190mm
    • Height 350mm
    • Depth 270mm
  • Weight 8.1kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 41.0 2.8 2.84
PK 144.0 0.94 -1.51
PK 369.0 3.0 0.55
PK 540.0 2.98 2.1
PK 942.0 1.14 -1.95
PK 1532.0 3.0 3.0
PK 2765.0 2.98 0.97
Download
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: -2.2dB.
Type Freq Q Gain
PK 49.0 2.98 2.88
PK 62.0 2.08 -1.36
PK 160.0 0.85 -1.52
PK 1083.0 0.96 -4.09
PK 1121.0 0.37 2.18
PK 1480.0 3.0 3.0
PK 7059.0 2.87 1.57
Download
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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