What we know about the measurement:

Donner Dyna 4 is an active bookshelves that cost around 90 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 .
  • -3dB (resp. -6db) point v.s. reference is at 67.4Hz (resp. 58.6Hz).
  • Reference level is normalised to -0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.9dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 2.57 and would be 5.32 with a perfect subwoofer.
      • Details: NBD: ON 0.631, LW 0.586, SP 0.542, PIR 0.533; SM: SP0.609, PIR0.348; LFQ 0.588, LFX 62Hz
    • Tonality (Preference) Score is 5.49 with an EQ and would be 8.01 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.409, LW 0.323, SP 0.328, PIR 0.276; SM: SP0.953, PIR0.936; LFQ 0.588, LFX 55Hz
  • Link to original Review: asr review. .
Donner Dyna 4
AutomaticEQ (IIR)
Set preamp gain to: -1.9dB.
Type Freq Q Gain
3 58.0 1.59 2.99
3 105.0 1.76 -2.94
3 160.0 0.95 -4.03
3 666.0 1.41 2.2
3 3525.0 1.76 2.98
3 5347.0 0.25 -1.69
3 7834.0 1.07 -5.15
Download

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

Donner Dyna 4 filters_auto_eq

AutomaticEQ

Donner Dyna 4 filters_eq_full

Target v.s. EQ

Donner Dyna 4
AutomaticEQ LW (IIR)
Set preamp gain to: -2.5dB.
Type Freq Q Gain
3 121.0 1.65 -2.95
3 187.0 0.93 -2.98
3 691.0 1.35 2.25
3 2153.0 3.26 -1.55
3 3325.0 1.88 2.98
3 7417.0 1.71 -2.99
3 9372.0 1.66 -2.82
Download

These EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

Donner Dyna 4
AutomaticEQ Score (IIR)
Set preamp gain to: -2.1dB.
Type Freq Q Gain
3 148.0 1.02 -5.13
3 418.0 3.77 -0.54
3 646.0 1.15 1.98
3 2380.0 4.01 -3.42
3 3325.0 1.37 3.09
3 6709.0 1.85 -3.18
3 8766.0 1.22 -3.82
Download

Donner Dyna 4
maiky76@ASR LW (IIR)
Set preamp gain to: -4.0dB.
Type Freq Q Gain
1 46.48 1.15 0.0
3 130.18 1.09 -5.22
3 707.24 1.29 3.01
3 2311.54 2.83 -1.72
3 3186.42 1.82 4.53
3 7334.05 1.87 -3.95
3 9662.85 4.47 -2.18
Download

These EQ is designed by ASR member maiky76. These EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

Donner Dyna 4
maiky76@ASR (IIR)
Set preamp gain to: -2.5dB.
Type Freq Q Gain
1 45.48 1.15 0.0
3 130.64 0.84 -5.02
3 661.91 1.22 2.32
3 2382.29 4.03 -2.99
3 3331.87 1.68 3.44
3 7287.37 1.49 -5.62
Download

These EQ is designed by ASR member maiky76. These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Donner Dyna 4
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
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 -0.5
3 250.0 2.14 -0.25
3 400.0 2.14 0.0
3 630.0 2.14 0.25
3 1000.0 2.14 0.25
3 1600.0 2.14 0.0
3 2500.0 2.14 0.0
3 4000.0 2.14 0.25
3 6300.0 2.14 -0.5
3 10000.0 2.14 -0.5
3 16000.0 2.14 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

Donner Dyna 4
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 -0.5
3 125.0 4.32 -0.75
3 160.0 4.32 -0.5
3 200.0 4.32 -0.5
3 250.0 4.32 -0.25
3 315.0 4.32 0.0
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 0.25
3 1000.0 4.32 0.0
3 1250.0 4.32 0.0
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
3 2500.0 4.32 0.0
3 3150.0 4.32 0.25
3 4000.0 4.32 0.0
3 5000.0 4.32 -0.25
3 6300.0 4.32 -0.5
3 8000.0 4.32 -0.75
3 10000.0 4.32 -0.5
3 12000.0 4.32 -0.25
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.

Donner Dyna 4: comparison between EQs
Donner Dyna 4

Comparison betweens various EQs

Donner Dyna 4

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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