What we know about the measurement:

Selah Audio RC3R is a passive bookshelves that cost around 1300 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: 73.7dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 79.8Hz (resp. 56.4Hz).
  • 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°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.53 and would be 7.07 with a perfect subwoofer.
      • Details: NBD: ON 0.384, LW 0.377, SP 0.35, PIR 0.317; SM: SP0.848, PIR0.56; LFQ 0.455, LFX 56Hz
    • Tonality (Preference) Score is 6.82 with an EQ and would be 8.27 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.303, LW 0.298, SP 0.312, PIR 0.258; SM: SP0.965, PIR0.913; LFQ 0.325, LFX 31Hz
  • Link to Original review.
Selah Audio RC3R
AutomaticEQ (IIR)
Set preamp gain to: -5.7dB.
Type Freq Q Gain
5 79.0 0.86 2.98
3 354.0 0.25 -2.87
3 547.0 2.59 2.1
3 739.0 0.68 -1.44
3 998.0 1.6 2.41
3 1762.0 1.25 -1.2
3 4966.0 0.29 -2.52
3 11454.0 0.33 -2.62
5 14965.0 0.83 2.85
Download

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

Selah Audio RC3R filters_auto_eq

AutomaticEQ

Selah Audio RC3R filters_eq_full

Target v.s. EQ

Selah Audio RC3R
flipflop@ASR (IIR)
Set preamp gain to: -2.0dB.
Type Freq Q Gain
3 380.0 15.0 -0.5
3 560.0 2.488 1.8
3 724.0 1.0 -0.6
3 864.0 4.8 1.5
3 1117.0 6.0 2.2
3 2143.0 2.236 -1.2
3 2920.0 5.2 -1.1
3 3840.0 5.0 0.9
3 5102.0 4.5 -1.5
3 5890.0 8.0 0.6
3 7150.0 4.0 -2.3
3 7960.0 6.0 2.4
3 9595.0 1.0 -1.3
3 11018.0 1.0 -2.2
3 11180.0 10.0 -0.6
3 12200.0 7.5 0.9
3 15650.0 5.0 -2.9
3 16763.0 5.0 -2.4
3 17992.0 5.0 -4.8
0 20000.0 0.7071067811865475 0.0
Download

These EQ is designed by ASR member flipflop.

Selah Audio RC3R
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 -0.25
3 1000.0 2.14 -0.25
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 -0.75
3 10000.0 2.14 -1.0
3 16000.0 2.14 -1.0
Download

These EQ is designed for a 15 bands graphical EQ.

Selah Audio RC3R
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 0.5
3 100.0 4.32 0.25
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 -0.25
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 -0.25
3 800.0 4.32 -0.25
3 1000.0 4.32 -0.25
3 1250.0 4.32 -0.25
3 1600.0 4.32 -0.25
3 2000.0 4.32 -0.25
3 2500.0 4.32 -0.5
3 3150.0 4.32 -0.5
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.75
3 8000.0 4.32 -0.5
3 10000.0 4.32 -0.75
3 12000.0 4.32 -0.75
3 16000.0 4.32 -1.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Selah Audio RC3R: comparison between EQs
Selah Audio RC3R

Comparison betweens various EQs

Selah Audio RC3R

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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