What we know about the measurement:

Canon S-50 is a passive omnidirectional that cost around 300 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 81.3dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 64.5Hz (resp. 58.6Hz).
  • Reference level is normalised to -0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 7.4dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-90.0°, 70.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Note: The tonality (Preference) score does not make sense for omnidirectional speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is -0.22 and would be 2.39 with a perfect subwoofer.
      • Details: NBD: ON 1.418, LW 1.3, SP 0.884, PIR 1.023; SM: SP0.679, PIR0.56; LFQ 0.381, LFX 58Hz
    • Tonality (Preference) Score is 2.48 with an EQ and would be 5.0 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.977, LW 0.822, SP 0.606, PIR 0.629; SM: SP0.739, PIR0.703; LFQ 0.381, LFX 55Hz
  • Link to Original review.
Canon S-50
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 84.0 2.97 -3.0
3 209.0 2.82 -1.86
3 6471.0 2.84 -5.98
3 15857.0 1.11 2.87
3 3209.0 2.99 2.99
3 1547.0 2.12 -5.45
3 875.0 2.98 -2.87
3 476.0 1.22 0.82
3 6563.0 2.99 -5.27
Download

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

Canon S-50 filters_auto_eq

AutomaticEQ

Canon S-50 filters_eq_full

Target v.s. EQ

Canon S-50
flipflop@ASR (IIR)
Set preamp gain to: -8.2dB.
Type Freq Q Gain
3 400.0 4.0 1.2
3 532.0 8.0 1.8
3 935.0 5.0 -2.0
3 1075.0 5.0 3.6
3 1352.0 5.0 2.0
3 1561.0 5.0 -3.7
3 2005.0 5.0 8.6
3 2122.0 5.0 -9.6
3 2232.0 5.0 6.6
3 2756.0 2.184 9.3
3 3066.0 1.0 -9.7
3 3298.0 5.0 9.2
3 4752.0 5.0 16.3
3 5150.0 5.0 -9.1
3 6171.0 1.103 -1.4
3 7041.0 5.0 -8.9
3 8747.0 2.115 12.6
3 9066.0 5.0 -6.3
3 10744.0 5.0 -4.9
3 13500.0 8.0 7.5
Download

These EQ is designed by ASR member flipflop.

Canon S-50
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
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 -0.5
3 400.0 2.14 -0.25
3 630.0 2.14 -0.25
3 1000.0 2.14 -0.5
3 1600.0 2.14 -0.75
3 2500.0 2.14 -0.5
3 4000.0 2.14 0.25
3 6300.0 2.14 -0.75
3 10000.0 2.14 0.0
3 16000.0 2.14 0.75
Download

These EQ is designed for a 15 bands graphical EQ.

Canon S-50
Graphic EQ 31 bands
Set preamp gain to: -0.9dB.
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 0.25
3 500.0 4.32 0.25
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 -0.5
3 2000.0 4.32 0.5
3 2500.0 4.32 0.5
3 3150.0 4.32 0.75
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 0.5
3 10000.0 4.32 0.25
3 12000.0 4.32 0.5
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.

Canon S-50: comparison between EQs
Canon S-50

Comparison betweens various EQs

Canon S-50

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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