What we know about the measurement:

GR Research X-LS Encore Kit is a passive bookshelves that cost around 500 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: 84.6dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 63.0Hz (resp. 54.2Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.0dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 70.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.26 and would be 7.62 with a perfect subwoofer.
      • Details: NBD: ON 0.399, LW 0.263, SP 0.421, PIR 0.321; SM: SP0.885, PIR0.82; LFQ 0.577, LFX 51Hz
    • Tonality (Preference) Score is 6.28 with an EQ and would be 8.23 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.351, LW 0.239, SP 0.365, PIR 0.258; SM: SP0.941, PIR0.945; LFQ 0.535, LFX 41Hz
  • Link to Original review.
GR Research X-LS Encore Kit
AutomaticEQ (IIR)
Set preamp gain to: -4.8dB.
Type Freq Q Gain
5 63.0 1.08 2.93
3 63.0 0.36 2.61
3 63.0 1.28 1.39
3 87.0 1.55 -2.97
3 125.0 1.1 -2.94
3 511.0 1.76 2.73
3 604.0 2.95 -2.46
3 2631.0 0.84 0.73
3 4064.0 1.28 -1.22
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

GR Research X-LS Encore Kit filters_auto_eq

AutomaticEQ

GR Research X-LS Encore Kit filters_eq_full

Target v.s. EQ

GR Research X-LS Encore Kit
flipflop@ASR (IIR)
Set preamp gain to: -1.6dB.
Type Freq Q Gain
3 355.0 11.0 0.6
3 408.0 15.0 1.0
3 439.0 16.0 0.7
3 492.0 5.9 1.6
3 537.0 25.0 0.7
3 608.0 6.5 -1.1
3 786.0 20.0 -0.7
3 1046.0 8.0 0.9
3 1150.0 7.0 -1.1
3 1420.0 13.0 0.9
3 1667.0 12.0 1.1
3 2002.0 15.0 -0.5
3 2225.0 25.0 -0.5
3 2430.0 15.0 -0.8
3 2720.0 20.0 -0.6
3 3599.0 1.188 -1.5
3 4030.0 7.0 -0.5
3 7400.0 2.952 -1.7
3 10850.0 7.0 0.5
3 14171.0 3.0 -1.3
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These EQ is designed by ASR member flipflop.

GR Research X-LS Encore Kit
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 0.0
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 0.25
3 2500.0 2.14 0.0
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
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These EQ is designed for a 15 bands graphical EQ.

GR Research X-LS Encore Kit
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 -0.5
3 160.0 4.32 -0.25
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 0.25
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 0.25
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 0.0
3 3150.0 4.32 0.0
3 4000.0 4.32 -0.25
3 5000.0 4.32 0.0
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
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These EQ is designed for a 31 bands graphical EQ.

GR Research X-LS Encore Kit: comparison between EQs
GR Research X-LS Encore Kit

Comparison betweens various EQs

GR Research X-LS Encore Kit

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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