What we know about the measurement:

ASR Directiva Open Source Speaker is an active bookshelves that cost around 1400 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 39.6Hz (resp. 36.6Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.3dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 60.0°) 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 6.39 and would be 8.05 with a perfect subwoofer.
      • Details: NBD: ON 0.344, LW 0.283, SP 0.245, PIR 0.234; SM: SP0.93, PIR0.831; LFQ 0.815, LFX 35Hz
    • Tonality (Preference) Score is 6.89 with an EQ and would be 8.47 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.345, LW 0.258, SP 0.247, PIR 0.204; SM: SP0.986, PIR0.973; LFQ 0.842, LFX 33Hz
  • Link to Original review.
ASR Directiva Open Source Speaker
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
5 46.0 0.82 2.94
3 87.0 2.35 0.46
3 418.0 2.08 0.39
3 933.0 2.73 -0.59
3 1948.0 2.26 -0.28
3 2461.0 1.91 2.14
3 5310.0 0.98 0.65
3 6709.0 2.19 -0.34
3 13537.0 0.56 -1.22
Download

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

ASR Directiva Open Source Speaker filters_auto_eq

AutomaticEQ

ASR Directiva Open Source Speaker filters_eq_full

Target v.s. EQ

ASR Directiva Open Source Speaker
Graphic EQ 15 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.0
3 100.0 2.14 0.0
3 160.0 2.14 0.0
3 250.0 2.14 0.0
3 400.0 2.14 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 0.0
3 1600.0 2.14 0.25
3 2500.0 2.14 0.5
3 4000.0 2.14 0.25
3 6300.0 2.14 0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

ASR Directiva Open Source Speaker
Graphic EQ 31 bands
Set preamp gain to: -0.6dB.
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 0.0
3 63.0 4.32 0.0
3 80.0 4.32 0.0
3 100.0 4.32 0.0
3 125.0 4.32 0.0
3 160.0 4.32 0.0
3 200.0 4.32 0.0
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 0.0
3 630.0 4.32 0.0
3 800.0 4.32 0.0
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 0.25
3 2500.0 4.32 0.5
3 3150.0 4.32 0.25
3 4000.0 4.32 0.25
3 5000.0 4.32 0.25
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.

ASR Directiva Open Source Speaker: comparison between EQs
ASR Directiva Open Source Speaker

Comparison betweens various EQs

ASR Directiva Open Source Speaker

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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