What we know about the measurement:

JBL Stage 250B is a passive bookshelves that cost around 400 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 85.4dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 64.5Hz (resp. 58.6Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.9dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.31 and would be 6.86 with a perfect subwoofer.
      • Details: NBD: ON 0.456, LW 0.341, SP 0.449, PIR 0.355; SM: SP0.783, PIR0.592; LFQ 0.391, LFX 56Hz
    • Tonality (Preference) Score is 5.87 with an EQ and would be 8.15 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.37, LW 0.249, SP 0.322, PIR 0.23; SM: SP0.942, PIR0.896; LFQ 0.391, LFX 49Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
  • Vendor specifications:
    • Sensitivity 86 dB
    • Impedance 6 Ohm
    • Size
      • Width 200mm
      • Height 321mm
      • Depth 241 mm)
    • Weight 5.6 kg
JBL Stage 250B
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
3 49.0 1.51 2.98
3 219.0 2.88 1.0
3 879.0 2.65 -3.1
3 1010.0 0.68 2.81
3 1333.0 2.59 2.98
3 2245.0 0.78 -4.32
Download

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

JBL Stage 250B filters_auto_eq

AutomaticEQ

JBL Stage 250B filters_eq_full

Target v.s. EQ

JBL Stage 250B
AutomaticEQ LW (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
3 60.0 3.0 2.5
3 211.0 2.97 0.69
3 849.0 0.66 2.2
3 879.0 2.59 -3.48
3 1288.0 2.97 2.99
3 2168.0 1.0 -2.73
Download

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

JBL Stage 250B: comparison between EQs
JBL Stage 250B

Comparison betweens various EQs

JBL Stage 250B

Improvements made by EQ
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
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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