What we know about the measurement:

Micca RB42 is a passive bookshelves that cost around 150 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: 80.5dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 98.1Hz (resp. 50.5Hz).
  • Reference level is normalised to 0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.49 and would be 6.77 with a perfect subwoofer.
      • Details: NBD: ON 0.44, LW 0.432, SP 0.505, PIR 0.401; SM: SP0.757, PIR0.597; LFQ 0.25, LFX 49Hz
    • Tonality (Preference) Score is 6.49 with an EQ and would be 8.63 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.276, LW 0.239, SP 0.288, PIR 0.184; SM: SP0.921, PIR0.944; LFQ 0.304, LFX 45Hz
  • Link to original Review: asr review. .
Micca RB42
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
5 98.0 1.15 2.09
3 98.0 1.76 2.1
3 214.0 1.18 -2.06
3 604.0 1.44 2.48
3 903.0 2.39 -1.06
3 2082.0 2.25 2.1
3 3008.0 1.2 -1.37
3 4803.0 2.56 -1.23
4 8766.0 30.0 0.46
Download

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

Micca RB42 filters_auto_eq

AutomaticEQ

Micca RB42 filters_eq_full

Target v.s. EQ

Micca RB42
flipflop@ASR (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 358.0 7.0 0.4
3 457.0 4.0 1.4
3 523.0 13.0 0.8
3 575.0 8.0 2.1
3 652.0 11.0 1.7
3 736.0 12.0 0.9
3 808.0 7.0 0.8
3 1105.0 11.0 0.5
3 1422.0 8.0 0.8
3 1713.0 6.0 1.2
3 1970.0 10.0 1.7
3 2220.0 8.5 1.9
3 2530.0 10.0 0.6
3 3220.0 11.0 -0.7
3 5156.0 1.503 -3.0
3 5732.0 5.0 1.0
3 8146.0 5.0 2.7
3 8571.0 5.0 -3.6
3 12970.0 10.0 -0.8
3 15630.0 8.0 -1.2
Download

These EQ is designed by ASR member flipflop.

Micca RB42
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 0.5
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 0.25
3 1000.0 2.14 0.0
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 -0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

Micca RB42
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 0.5
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 -0.25
3 400.0 4.32 0.0
3 500.0 4.32 0.25
3 630.0 4.32 0.25
3 800.0 4.32 0.0
3 1000.0 4.32 -0.25
3 1250.0 4.32 -0.25
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
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 0.0
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.

Micca RB42: comparison between EQs
Micca RB42

Comparison betweens various EQs

Micca RB42

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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