What we know about the measurement:

Definitive Technology D9 is a passive bookshelves

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • Sensitivity: 77.3dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 51.6Hz (resp. 48.5Hz).
  • Reference level is normalised to 0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.7dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.0 and would be 6.23 with a perfect subwoofer.
      • Details: NBD: ON 0.517, LW 0.407, SP 0.47, PIR 0.435; SM: SP0.761, PIR0.493; LFQ 0.261, LFX 47Hz
    • Tonality (Preference) Score is 5.86 with an EQ and would be 8.0 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.362, LW 0.311, SP 0.366, PIR 0.303; SM: SP0.948, PIR0.919; LFQ 0.261, LFX 45Hz
  • Link to original Review: asr review. .
Definitive Technology D9
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
PK 34.0 0.57 2.84
PK 134.0 0.9 -2.92
PK 260.0 2.98 0.98
PK 739.0 3.0 -2.09
PK 4654.0 2.93 -3.14
PK 7834.0 1.16 -1.7
PK 16239.0 0.7 -5.63
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Definitive Technology D9 filters_auto_eq

AutomaticEQ

Definitive Technology D9 filters_eq_full

Target v.s. EQ

Definitive Technology D9
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
PK 25.0 2.14 0.0
PK 40.0 2.14 0.0
PK 63.0 2.14 0.0
PK 100.0 2.14 0.0
PK 160.0 2.14 0.0
PK 250.0 2.14 0.0
PK 400.0 2.14 0.0
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.0
PK 1600.0 2.14 0.25
PK 2500.0 2.14 0.25
PK 4000.0 2.14 -0.25
PK 6300.0 2.14 -0.25
PK 10000.0 2.14 -0.5
PK 16000.0 2.14 -0.5
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These EQ is designed for a 15 bands graphical EQ.

Definitive Technology D9
Graphic EQ 31 bands
Set preamp gain to: -0.2dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.0
PK 31.0 4.32 0.0
PK 40.0 4.32 0.0
PK 50.0 4.32 0.0
PK 63.0 4.32 0.0
PK 80.0 4.32 0.0
PK 100.0 4.32 0.0
PK 125.0 4.32 0.0
PK 160.0 4.32 0.0
PK 200.0 4.32 0.0
PK 250.0 4.32 0.0
PK 315.0 4.32 0.0
PK 400.0 4.32 0.0
PK 500.0 4.32 0.0
PK 630.0 4.32 0.0
PK 800.0 4.32 0.0
PK 1000.0 4.32 0.0
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.0
PK 2000.0 4.32 0.0
PK 2500.0 4.32 0.25
PK 3150.0 4.32 0.0
PK 4000.0 4.32 -0.25
PK 5000.0 4.32 -0.5
PK 6300.0 4.32 -0.5
PK 8000.0 4.32 -0.5
PK 10000.0 4.32 -0.5
PK 12000.0 4.32 -0.5
PK 16000.0 4.32 -0.5
PK 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Definitive Technology D9: comparison between EQs
Definitive Technology D9

Comparison betweens various EQs

Definitive Technology D9

Improvements made by EQ

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