What we know about the measurement:

Jeff Bagby Mandolin DIY is a passive bookshelves that cost around 300 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 .
  • -3dB (resp. -6db) point v.s. reference is at 55.7Hz (resp. 46.9Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.5dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.34 and would be 7.41 with a perfect subwoofer.
      • Details: NBD: ON 0.454, LW 0.337, SP 0.404, PIR 0.331; SM: SP0.872, PIR0.799; LFQ 0.576, LFX 43Hz
    • Tonality (Preference) Score is 6.72 with an EQ and would be 8.45 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.303, LW 0.249, SP 0.319, PIR 0.231; SM: SP0.951, PIR0.957; LFQ 0.576, LFX 36Hz
  • Link to Original review.
Jeff Bagby Mandolin DIY
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 37.0 0.83 3.0
PK 95.0 1.29 -3.09
PK 227.0 1.59 1.09
PK 344.0 2.99 1.66
PK 2491.0 1.48 -2.28
PK 2862.0 2.71 2.4
PK 4654.0 2.64 -2.25
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Jeff Bagby Mandolin DIY
Graphic EQ 15 bands
Set preamp gain to: -0.5dB.
Type Freq Q Gain
PK 25.0 2.14 0.25
PK 40.0 2.14 0.25
PK 63.0 2.14 0.0
PK 100.0 2.14 -0.5
PK 160.0 2.14 -0.25
PK 250.0 2.14 0.0
PK 400.0 2.14 0.25
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.0
PK 1600.0 2.14 0.0
PK 2500.0 2.14 -0.25
PK 4000.0 2.14 -0.25
PK 6300.0 2.14 0.0
PK 10000.0 2.14 0.25
PK 16000.0 2.14 0.5
Download
This EQ is designed for a 15 bands graphical EQ.
Jeff Bagby Mandolin DIY
Graphic EQ 31 bands
Set preamp gain to: -1.0dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.25
PK 31.0 4.32 0.25
PK 40.0 4.32 0.25
PK 50.0 4.32 0.25
PK 63.0 4.32 0.0
PK 80.0 4.32 -0.5
PK 100.0 4.32 -0.5
PK 125.0 4.32 -0.25
PK 160.0 4.32 0.0
PK 200.0 4.32 0.0
PK 250.0 4.32 0.25
PK 315.0 4.32 0.25
PK 400.0 4.32 0.25
PK 500.0 4.32 0.25
PK 630.0 4.32 0.25
PK 800.0 4.32 0.0
PK 1000.0 4.32 0.0
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.25
PK 2000.0 4.32 0.0
PK 2500.0 4.32 0.0
PK 3150.0 4.32 0.25
PK 4000.0 4.32 0.0
PK 5000.0 4.32 0.0
PK 6300.0 4.32 0.25
PK 8000.0 4.32 0.5
PK 10000.0 4.32 0.5
PK 12000.0 4.32 0.5
PK 16000.0 4.32 1.0
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
Jeff Bagby Mandolin DIY: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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