What we know about the measurement:

Bose 141 is a passive bookshelves

  • Quality of the measurement data is unknown.
  • Origin of the data is Bose.
  • Format of the data is .
  • Sensitivity: 83.1dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 88.5Hz (resp. 74.4Hz).
  • Reference level is normalised to 0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 5.9dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is -0.75 and would be 2.33 with a perfect subwoofer.
      • Details: NBD: ON 1.193, LW 1.002, SP 0.918, PIR 0.913; SM: SP0.526, PIR0.153; LFQ 0.823, LFX 75Hz
    • Tonality (Preference) Score is 2.84 with an EQ and would be 5.47 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.884, LW 0.677, SP 0.644, PIR 0.595; SM: SP0.895, PIR0.762; LFQ 0.627, LFX 59Hz
Bose 141
AutomaticEQ (IIR)
Set preamp gain to: -2.3dB.
Type Freq Q Gain
PK 121.0 1.3 -3.0
PK 378.0 0.25 3.0
PK 668.0 2.08 -2.61
PK 844.0 2.99 -2.99
PK 1948.0 1.37 -2.95
PK 2813.0 2.05 -2.94
PK 4064.0 2.96 2.98
PK 9691.0 2.96 -2.99
PK 11454.0 1.04 -2.97
Download

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

Bose 141 filters_auto_eq

AutomaticEQ

Bose 141 filters_eq_full

Target v.s. EQ

Bose 141
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.5
PK 63.0 2.14 0.5
PK 100.0 2.14 -0.25
PK 160.0 2.14 0.0
PK 250.0 2.14 0.25
PK 400.0 2.14 0.0
PK 630.0 2.14 -0.25
PK 1000.0 2.14 0.0
PK 1600.0 2.14 -0.25
PK 2500.0 2.14 -0.75
PK 4000.0 2.14 0.0
PK 6300.0 2.14 -0.25
PK 10000.0 2.14 -1.5
PK 16000.0 2.14 -0.25
Download

These EQ is designed for a 15 bands graphical EQ.

Bose 141
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.5
PK 31.0 4.32 0.5
PK 40.0 4.32 0.5
PK 50.0 4.32 0.5
PK 63.0 4.32 0.5
PK 80.0 4.32 0.5
PK 100.0 4.32 -0.25
PK 125.0 4.32 -0.25
PK 160.0 4.32 0.0
PK 200.0 4.32 0.25
PK 250.0 4.32 0.5
PK 315.0 4.32 0.5
PK 400.0 4.32 0.25
PK 500.0 4.32 0.0
PK 630.0 4.32 -0.25
PK 800.0 4.32 -0.5
PK 1000.0 4.32 0.0
PK 1250.0 4.32 -0.25
PK 1600.0 4.32 -0.25
PK 2000.0 4.32 -0.5
PK 2500.0 4.32 -0.5
PK 3150.0 4.32 -0.5
PK 4000.0 4.32 0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 0.25
PK 8000.0 4.32 0.0
PK 10000.0 4.32 -1.25
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.0
PK 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Bose 141: comparison between EQs
Bose 141

Comparison betweens various EQs

Bose 141

Improvements made by EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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