What we know about the measurement:

Polk Audio Signature S30 is a passive center that cost around 229 USD

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 89.0dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 71.8Hz (resp. 63.0Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 4.2dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 70.0°) 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 3.55 and would be 6.16 with a perfect subwoofer.
      • Details: NBD: ON 0.642, LW 0.449, SP 0.512, PIR 0.411; SM: SP0.776, PIR0.566; LFQ 0.672, LFX 58Hz
    • Tonality (Preference) Score is 4.88 with an EQ and would be 7.24 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.588, LW 0.394, SP 0.503, PIR 0.367; SM: SP0.935, PIR0.917; LFQ 0.672, LFX 51Hz
  • Vertical measurement
  • Link to Original review.
Polk Audio Signature S30
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
5 71.0 0.76 2.89
3 229.0 2.23 1.09
3 366.0 2.37 1.49
3 447.0 1.29 -0.77
3 965.0 2.99 -2.76
3 1180.0 1.87 2.58
3 3216.0 2.99 -0.6
3 4803.0 2.75 -2.11
3 11843.0 0.59 -2.51
Download

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

Polk Audio Signature S30 filters_auto_eq

AutomaticEQ

Polk Audio Signature S30 filters_eq_full

Target v.s. EQ

Polk Audio Signature S30
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 0.0
3 250.0 2.14 0.25
3 400.0 2.14 0.25
3 630.0 2.14 0.0
3 1000.0 2.14 -0.25
3 1600.0 2.14 0.5
3 2500.0 2.14 0.25
3 4000.0 2.14 0.0
3 6300.0 2.14 -0.25
3 10000.0 2.14 -0.25
3 16000.0 2.14 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

Polk Audio Signature S30
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
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 0.0
3 100.0 4.32 -0.25
3 125.0 4.32 -0.25
3 160.0 4.32 0.0
3 200.0 4.32 0.0
3 250.0 4.32 0.25
3 315.0 4.32 0.25
3 400.0 4.32 0.25
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 -0.25
3 1000.0 4.32 -0.25
3 1250.0 4.32 0.5
3 1600.0 4.32 0.5
3 2000.0 4.32 0.5
3 2500.0 4.32 0.25
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 -0.25
3 8000.0 4.32 -0.25
3 10000.0 4.32 -0.25
3 12000.0 4.32 -0.25
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.

Polk Audio Signature S30: comparison between EQs
Polk Audio Signature S30

Comparison betweens various EQs

Polk Audio Signature S30

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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