What we know about the measurement:

Bose DesignMax DM8S is a passive bookshelves that cost around 666 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is Bose.
  • Format of the data is a GLL file .
  • Sensitivity: 95.5dB (avg. 100Hz-1kHz for 2.83V estimated at 1m) . Sensitivity computed at the measurement distance (10m) over the same frequency range: 75.5dB.
  • -3dB (resp. -6db) point v.s. reference is at 67.0Hz (resp. 61.5Hz).
  • Reference level is normalised to 0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 6.7dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-30.0°, 20.0°) 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 -0.07 and would be 2.67 with a perfect subwoofer.
      • Details: NBD: ON 1.091, LW 0.965, SP 0.948, PIR 0.914; SM: SP0.554, PIR0.191; LFQ 0.661, LFX 63Hz
    • Tonality (Preference) Score is 2.86 with an EQ and would be 5.56 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.798, LW 0.706, SP 0.703, PIR 0.646; SM: SP0.885, PIR0.775; LFQ 0.661, LFX 61Hz
  • .
  • Vendor specifications:
    • Dispersion: 130° horizontal and 130° vertical.
    • Sensitivity 93 dB
    • Impedance 8 Ohm
    • SPL
      • peak: 115 dB
    • Size
      • Width 249mm
      • Height 395mm
      • Depth 273 mm)
    • Weight 10.34 kg
Bose DesignMax DM8S
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
3 102.0 2.39 -2.66
3 252.0 2.98 3.0
3 765.0 3.0 3.0
3 2406.0 3.0 -3.9
3 6361.0 2.99 -2.8
3 8110.0 2.99 2.99
3 8694.0 0.61 -4.42
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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 DesignMax DM8S filters_auto_eq

AutomaticEQ

Bose DesignMax DM8S filters_eq_full

Target v.s. EQ

Bose DesignMax DM8S
Graphic EQ 15 bands
Set preamp gain to: -1.0dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.5
3 100.0 2.14 -0.5
3 160.0 2.14 0.0
3 250.0 2.14 1.0
3 400.0 2.14 0.0
3 630.0 2.14 0.5
3 1000.0 2.14 0.5
3 1600.0 2.14 0.0
3 2500.0 2.14 -0.25
3 4000.0 2.14 0.0
3 6300.0 2.14 -0.5
3 10000.0 2.14 0.0
3 16000.0 2.14 0.25
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These EQ is designed for a 15 bands graphical EQ.

Bose DesignMax DM8S
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 0.5
3 31.0 4.32 0.5
3 40.0 4.32 0.5
3 50.0 4.32 0.5
3 63.0 4.32 0.5
3 80.0 4.32 -0.25
3 100.0 4.32 -0.5
3 125.0 4.32 -0.25
3 160.0 4.32 0.0
3 200.0 4.32 0.25
3 250.0 4.32 0.75
3 315.0 4.32 0.25
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 0.25
3 800.0 4.32 0.75
3 1000.0 4.32 0.25
3 1250.0 4.32 -0.25
3 1600.0 4.32 -0.25
3 2000.0 4.32 -0.75
3 2500.0 4.32 -0.5
3 3150.0 4.32 -0.5
3 4000.0 4.32 -0.5
3 5000.0 4.32 0.0
3 6300.0 4.32 -0.75
3 8000.0 4.32 0.0
3 10000.0 4.32 -0.25
3 12000.0 4.32 -0.5
3 16000.0 4.32 -0.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Bose DesignMax DM8S: comparison between EQs
Bose DesignMax DM8S

Comparison betweens various EQs

Bose DesignMax DM8S

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
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