What we know about the measurement:

RBH Sound PM-8 is a passive bookshelves

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • Sensitivity: 86.6dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 200.0Hz (resp. 200.0Hz).
  • Reference level is normalised to 0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.7dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.88 and would be 6.79 with a perfect subwoofer.
      • Details: NBD: ON 0.423, LW 0.486, SP 0.604, PIR 0.438; SM: SP0.702, PIR0.636; LFQ 10.0, LFX 200Hz
    • Tonality (Preference) Score is 2.89 with an EQ and would be 7.8 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.418, LW 0.392, SP 0.475, PIR 0.309; SM: SP0.861, PIR0.899; LFQ 10.0, LFX 200Hz
  • Link to Original review.
RBH Sound PM-8
AutomaticEQ (IIR)
Set preamp gain to: -0.8dB.
Type Freq Q Gain
3 22.0 1.32 0.79
3 235.0 2.39 -1.05
3 765.0 3.0 0.89
3 1954.0 0.86 -1.3
3 4495.0 3.0 -2.38
3 6818.0 2.97 -1.36
3 10341.0 1.34 -1.29
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

RBH Sound PM-8 filters_auto_eq

AutomaticEQ

RBH Sound PM-8 filters_eq_full

Target v.s. EQ

RBH Sound PM-8
Graphic EQ 15 bands
Set preamp gain to: -0.2dB.
Type Freq Q Gain
3 25.0 2.14 0.0
3 40.0 2.14 0.0
3 63.0 2.14 0.0
3 100.0 2.14 0.0
3 160.0 2.14 0.0
3 250.0 2.14 0.0
3 400.0 2.14 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 0.0
3 1600.0 2.14 -0.25
3 2500.0 2.14 -0.5
3 4000.0 2.14 -0.5
3 6300.0 2.14 -0.5
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.

RBH Sound PM-8
Graphic EQ 31 bands
Set preamp gain to: -0.2dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.0
3 31.0 4.32 0.0
3 40.0 4.32 0.0
3 50.0 4.32 0.0
3 63.0 4.32 0.0
3 80.0 4.32 0.0
3 100.0 4.32 0.0
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 0.0
3 315.0 4.32 0.0
3 400.0 4.32 0.0
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 0.0
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 -0.25
3 4000.0 4.32 -0.5
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.5
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 0.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

RBH Sound PM-8: comparison between EQs
RBH Sound PM-8

Comparison betweens various EQs

RBH Sound PM-8

Improvements made by EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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