What we know about the measurement:

Andersson HIS 2.1 is a passive center that cost around 20 USD

  • 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: 76.4dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 99.3Hz (resp. 59.1Hz).
  • Reference level is normalised to 0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.0dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-10.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-40.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.52 and would be 3.93 with a perfect subwoofer.
      • Details: NBD: ON 0.941, LW 0.665, SP 0.799, PIR 0.734; SM: SP0.578, PIR0.341; LFQ 0.864, LFX 52Hz
    • Tonality (Preference) Score is 5.35 with an EQ and would be 7.74 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.511, LW 0.303, SP 0.365, PIR 0.286; SM: SP0.95, PIR0.942; LFQ 0.864, LFX 51Hz
  • Link to original Review: asr review. .
  • Vendor specifications:
    • Sensitivity 89 dB
    • Impedance 8 Ohm
    • Size
      • Width 460mm
      • Height 160mm
      • Depth 190mm
    • Weight 4.0kg
Andersson HIS 2.1
AutomaticEQ (IIR)
Set preamp gain to: -1.6dB.
Type Freq Q Gain
PK 102.0 2.99 3.0
PK 149.0 1.95 -8.95
PK 454.0 0.92 2.04
PK 1244.0 2.99 -3.45
PK 2023.0 2.95 3.0
PK 2862.0 1.14 -1.94
PK 10707.0 1.05 -7.45
Download

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

Andersson HIS 2.1 filters_auto_eq

AutomaticEQ

Andersson HIS 2.1 filters_eq_full

Target v.s. EQ

Andersson HIS 2.1
AutomaticEQ LW (IIR)
Set preamp gain to: -4.6dB.
Type Freq Q Gain
PK 102.0 3.0 3.0
PK 155.0 1.86 -9.0
PK 879.0 0.25 1.96
PK 1954.0 3.0 2.99
PK 9989.0 1.37 -2.88
PK 11882.0 2.41 -2.13
Download

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

Andersson HIS 2.1: comparison between EQs
Andersson HIS 2.1

Comparison betweens various EQs

Andersson HIS 2.1

Improvements made by EQ
CEA2034
CEA2034 Normalized
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
CEA2034 Normalized
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
Frequency Frequency with EQ
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