What we know about the measurement:

HTD Level THREE is a passive bookshelves that cost around 429 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 46.9Hz (resp. 42.5Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 7.1dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 0.09 and would be 2.17 with a perfect subwoofer.
      • Details: NBD: ON 1.167, LW 1.082, SP 0.825, PIR 0.876; SM: SP0.262, PIR0.008; LFQ 0.728, LFX 43Hz
    • Tonality (Preference) Score is 2.49 with an EQ and would be 4.37 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 1.051, LW 0.979, SP 0.796, PIR 0.795; SM: SP0.864, PIR0.725; LFQ 0.728, LFX 39Hz
  • Link to Original review.
HTD Level THREE
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
PK 67.0 2.69 -1.59
PK 409.0 2.99 2.67
PK 714.0 3.0 -4.03
PK 910.0 1.77 3.0
PK 1760.0 3.0 -2.73
PK 9648.0 2.99 -3.8
PK 15150.0 0.39 -9.0
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.
HTD Level THREE
AutomaticEQ LW (IIR)
Set preamp gain to: -2.3dB.
Type Freq Q Gain
PK 46.0 2.95 2.8
PK 60.0 0.96 -1.97
PK 432.0 2.81 2.29
PK 1103.0 2.97 2.26
PK 14473.0 0.48 -2.26
PK 14965.0 0.62 -2.92
PK 16000.0 0.56 -2.97
Download
This EQ optimise for a flat listening window and is a good start for near field listening like on your desk.
HTD Level THREE
AutomaticEQ Score (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
PK 46.0 1.82 2.97
PK 64.0 2.03 -2.92
PK 418.0 2.99 2.83
PK 1103.0 2.99 2.39
PK 13537.0 0.44 -2.98
PK 14473.0 0.36 -2.97
PK 14473.0 0.36 -2.95
Download
HTD Level THREE
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 -0.25
PK 100.0 2.14 0.0
PK 160.0 2.14 0.0
PK 250.0 2.14 0.25
PK 400.0 2.14 0.5
PK 630.0 2.14 -0.25
PK 1000.0 2.14 0.25
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 -0.25
PK 10000.0 2.14 -1.0
PK 16000.0 2.14 -1.25
Download
This EQ is designed for a 15 bands graphical EQ.
HTD Level THREE
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 0.25
PK 50.0 4.32 0.0
PK 63.0 4.32 -0.25
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 0.0
PK 250.0 4.32 0.25
PK 315.0 4.32 -0.25
PK 400.0 4.32 0.5
PK 500.0 4.32 0.0
PK 630.0 4.32 -0.25
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 -0.25
PK 3150.0 4.32 -0.25
PK 4000.0 4.32 -0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 -0.5
PK 10000.0 4.32 -0.75
PK 12000.0 4.32 -0.75
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)
HTD Level THREE: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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