What we know about the measurement:

Definitive Technology Demand D11 is a passive bookshelves that cost around 1200 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 86.6dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 60.1Hz (resp. 52.7Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 4.3dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.41 and would be 6.77 with a perfect subwoofer.
      • Details: NBD: ON 0.471, LW 0.461, SP 0.469, PIR 0.452; SM: SP0.832, PIR0.697; LFQ 0.644, LFX 51Hz
    • Tonality (Preference) Score is 5.83 with an EQ and would be 8.03 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.344, LW 0.346, SP 0.345, PIR 0.308; SM: SP0.945, PIR0.917; LFQ 0.634, LFX 46Hz
  • Link to Original review.
Definitive Technology Demand D11
AutomaticEQ (IIR)
Set preamp gain to: -2.4dB.
Type Freq Q Gain
3 60.0 1.16 2.81
3 102.0 0.98 -2.92
3 547.0 2.98 2.82
3 646.0 3.0 -2.99
3 903.0 2.21 1.48
3 2721.0 2.88 2.78
3 3438.0 2.08 -0.38
3 6489.0 1.46 -2.28
3 11843.0 1.18 0.16
Download

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

Definitive Technology Demand D11 filters_auto_eq

AutomaticEQ

Definitive Technology Demand D11 filters_eq_full

Target v.s. EQ

Definitive Technology Demand D11
flipflop@ASR (IIR)
Set preamp gain to: -3.5dB.
Type Freq Q Gain
3 375.0 4.0 0.9
3 445.0 13.0 -0.9
3 488.0 10.0 0.9
3 532.0 13.0 4.2
3 577.0 18.0 2.9
3 618.0 5.4 -4.8
3 745.0 16.0 1.0
3 892.0 6.0 0.8
3 1084.0 10.0 0.8
3 1240.0 4.8 -1.4
3 1760.0 11.0 -1.2
3 2220.0 25.0 -0.7
3 2567.0 20.0 1.0
3 2830.0 10.0 1.4
3 3425.0 11.0 -0.4
3 6430.0 2.5 -2.0
3 9700.0 2.5 -1.5
3 11400.0 6.5 1.5
3 13400.0 2.8 -1.5
3 16800.0 4.0 -1.2
Download

These EQ is designed by ASR member flipflop.

Definitive Technology Demand D11
Graphic EQ 15 bands
Set preamp gain to: -0.5dB.
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 -0.25
3 160.0 2.14 -0.25
3 250.0 2.14 0.0
3 400.0 2.14 0.0
3 630.0 2.14 -0.5
3 1000.0 2.14 0.25
3 1600.0 2.14 0.25
3 2500.0 2.14 0.5
3 4000.0 2.14 0.0
3 6300.0 2.14 -0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.25
Download

These EQ is designed for a 15 bands graphical EQ.

Definitive Technology Demand D11
Graphic EQ 31 bands
Set preamp gain to: -0.4dB.
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 0.25
3 80.0 4.32 -0.25
3 100.0 4.32 -0.25
3 125.0 4.32 -0.25
3 160.0 4.32 -0.25
3 200.0 4.32 -0.25
3 250.0 4.32 0.0
3 315.0 4.32 0.0
3 400.0 4.32 0.0
3 500.0 4.32 0.25
3 630.0 4.32 -0.5
3 800.0 4.32 0.0
3 1000.0 4.32 0.0
3 1250.0 4.32 -0.25
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
3 2500.0 4.32 0.25
3 3150.0 4.32 0.25
3 4000.0 4.32 0.0
3 5000.0 4.32 0.0
3 6300.0 4.32 -0.25
3 8000.0 4.32 0.0
3 10000.0 4.32 0.0
3 12000.0 4.32 0.0
3 16000.0 4.32 0.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Definitive Technology Demand D11: comparison between EQs
Definitive Technology Demand D11

Comparison betweens various EQs

Definitive Technology Demand D11

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
;