What we know about the measurement:

Natural Sound NS17 is a passive bookshelves that cost around 2300 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: 83.0dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 60.1Hz (resp. 43.9Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 4.2dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 70.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.8 and would be 6.67 with a perfect subwoofer.
      • Details: NBD: ON 0.513, LW 0.416, SP 0.416, PIR 0.4; SM: SP0.816, PIR0.634; LFQ 0.633, LFX 39Hz
    • Tonality (Preference) Score is 6.64 with an EQ and would be 8.13 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.407, LW 0.309, SP 0.286, PIR 0.241; SM: SP0.954, PIR0.944; LFQ 0.679, LFX 32Hz
  • Link to Original review.
Natural Sound NS17
AutomaticEQ (IIR)
Set preamp gain to: -5.0dB.
Type Freq Q Gain
3 30.0 2.97 2.98
3 62.0 0.25 2.31
3 666.0 2.96 -0.88
3 1429.0 2.99 -1.76
3 2324.0 3.0 2.98
3 3525.0 1.61 -3.06
3 14633.0 0.25 1.43
Download

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

Natural Sound NS17 filters_auto_eq

AutomaticEQ

Natural Sound NS17 filters_eq_full

Target v.s. EQ

Natural Sound NS17
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
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 0.25
3 160.0 2.14 0.25
3 250.0 2.14 0.25
3 400.0 2.14 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 -0.25
3 1600.0 2.14 -0.25
3 2500.0 2.14 0.25
3 4000.0 2.14 -0.25
3 6300.0 2.14 0.0
3 10000.0 2.14 0.25
3 16000.0 2.14 0.25
Download

These EQ is designed for a 15 bands graphical EQ.

Natural Sound NS17
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 0.25
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 0.25
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 0.0
3 800.0 4.32 0.0
3 1000.0 4.32 -0.25
3 1250.0 4.32 0.0
3 1600.0 4.32 -0.25
3 2000.0 4.32 0.25
3 2500.0 4.32 0.25
3 3150.0 4.32 -0.5
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.25
3 6300.0 4.32 0.0
3 8000.0 4.32 0.0
3 10000.0 4.32 0.25
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.

Natural Sound NS17: comparison between EQs
Natural Sound NS17

Comparison betweens various EQs

Natural Sound NS17

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
Frequency Frequency with EQ
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