What we know about the measurement:

Hedd Type 20 MK2 is an active bookshelves that cost around 2400 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 35.2Hz (resp. 33.7Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.4dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.21 and would be 7.79 with a perfect subwoofer.
      • Details: NBD: ON 0.401, LW 0.334, SP 0.366, PIR 0.322; SM: SP0.938, PIR0.895; LFQ 0.862, LFX 33Hz
    • Tonality (Preference) Score is 6.65 with an EQ and would be 8.15 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.36, LW 0.271, SP 0.32, PIR 0.253; SM: SP0.955, PIR0.915; LFQ 0.862, LFX 32Hz
  • Link to Original review.
Hedd Type 20 MK2
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
LS 44.0 0.29 2.81
PK 49.0 2.54 -2.82
PK 93.0 1.67 1.02
PK 214.0 2.61 1.33
PK 271.0 2.65 -0.32
PK 366.0 2.18 -0.35
PK 1067.0 1.34 0.97
PK 5490.0 2.89 0.94
PK 14965.0 0.48 2.61
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Hedd Type 20 MK2
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 0.0
PK 63.0 2.14 0.0
PK 100.0 2.14 0.0
PK 160.0 2.14 0.0
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 0.0
PK 4000.0 2.14 0.0
PK 6300.0 2.14 0.0
PK 10000.0 2.14 0.25
PK 16000.0 2.14 0.5
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This EQ is designed for a 15 bands graphical EQ.
Hedd Type 20 MK2
Graphic EQ 31 bands
Set preamp gain to: -0.5dB.
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 0.0
PK 50.0 4.32 -0.25
PK 63.0 4.32 0.0
PK 80.0 4.32 0.25
PK 100.0 4.32 0.0
PK 125.0 4.32 0.0
PK 160.0 4.32 0.0
PK 200.0 4.32 0.25
PK 250.0 4.32 0.0
PK 315.0 4.32 0.0
PK 400.0 4.32 -0.25
PK 500.0 4.32 0.0
PK 630.0 4.32 0.0
PK 800.0 4.32 0.0
PK 1000.0 4.32 0.25
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.0
PK 2000.0 4.32 0.0
PK 2500.0 4.32 0.0
PK 3150.0 4.32 0.0
PK 4000.0 4.32 0.0
PK 5000.0 4.32 0.0
PK 6300.0 4.32 0.0
PK 8000.0 4.32 0.0
PK 10000.0 4.32 0.0
PK 12000.0 4.32 0.25
PK 16000.0 4.32 0.5
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)
Hedd Type 20 MK2: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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