What we know about the measurement:

Bose 901 Series V is an active bookshelves

  • Quality of the measurement data is unknown.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • -3dB (resp. -6db) point v.s. reference is at 55.8Hz (resp. 44.9Hz).
  • Reference level is normalised to -1.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 8.4dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-40.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.69 and would be 3.37 with a perfect subwoofer.
      • Details: NBD: ON 1.439, LW 1.293, SP 0.874, PIR 0.802; SM: SP0.709, PIR0.72; LFQ 2.705, LFX 35Hz
    • Tonality (Preference) Score is 3.63 with an EQ and would be 4.23 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 1.369, LW 1.191, SP 0.781, PIR 0.732; SM: SP0.916, PIR0.926; LFQ 2.558, LFX 20Hz
  • Link to original Review: eac review. Links to other reviews: asr review .
Bose 901 Series V
AutomaticEQ (IIR)
Set preamp gain to: -8.3dB.
Type Freq Q Gain
3 55.0 0.26 2.99
3 125.0 0.27 2.98
3 547.0 0.83 -2.92
3 668.0 0.56 -2.76
3 844.0 0.47 -2.83
3 2813.0 2.04 -2.8
3 3325.0 0.35 -2.71
3 6709.0 2.84 -2.74
5 14965.0 0.44 2.98
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Bose 901 Series V filters_auto_eq

AutomaticEQ

Bose 901 Series V filters_eq_full

Target v.s. EQ

Bose 901 Series V
Graphic EQ 15 bands
Set preamp gain to: -1.0dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.25
3 100.0 2.14 -0.5
3 160.0 2.14 -1.0
3 250.0 2.14 -1.25
3 400.0 2.14 -1.5
3 630.0 2.14 -1.5
3 1000.0 2.14 -1.0
3 1600.0 2.14 -0.75
3 2500.0 2.14 -1.0
3 4000.0 2.14 -0.5
3 6300.0 2.14 -0.5
3 10000.0 2.14 -0.25
3 16000.0 2.14 1.0
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These EQ is designed for a 15 bands graphical EQ.

Bose 901 Series V
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.25
3 31.0 4.32 0.25
3 40.0 4.32 0.25
3 50.0 4.32 0.25
3 63.0 4.32 0.0
3 80.0 4.32 -0.25
3 100.0 4.32 -0.5
3 125.0 4.32 -0.75
3 160.0 4.32 -1.0
3 200.0 4.32 -1.0
3 250.0 4.32 -1.25
3 315.0 4.32 -1.25
3 400.0 4.32 -1.25
3 500.0 4.32 -1.5
3 630.0 4.32 -1.25
3 800.0 4.32 -1.25
3 1000.0 4.32 -1.0
3 1250.0 4.32 -1.0
3 1600.0 4.32 -0.75
3 2000.0 4.32 -0.75
3 2500.0 4.32 -1.0
3 3150.0 4.32 -0.75
3 4000.0 4.32 -0.5
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.5
3 8000.0 4.32 0.0
3 10000.0 4.32 -0.25
3 12000.0 4.32 0.75
3 16000.0 4.32 0.75
3 20000.0 4.32 0.0
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These EQ is designed for a 31 bands graphical EQ.

Bose 901 Series V: comparison between EQs
Bose 901 Series V

Comparison betweens various EQs

Bose 901 Series V

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
Frequency Frequency with EQ
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