What we know about the measurement:

Ascend Acoustics Sierra-LX is a passive bookshelves that cost around 1438 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is Ascend Acoustics.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • -3dB (resp. -6db) point v.s. reference is at 45.4Hz (resp. 41.0Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.7dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.76 and would be 8.57 with a perfect subwoofer.
      • Details: NBD: ON 0.249, LW 0.208, SP 0.265, PIR 0.219; SM: SP0.951, PIR0.932; LFQ 0.464, LFX 38Hz
    • Tonality (Preference) Score is 7.21 with an EQ and would be 8.79 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.231, LW 0.19, SP 0.228, PIR 0.174; SM: SP0.957, PIR0.952; LFQ 0.629, LFX 33Hz
  • Link to original Review: vendor review. Links to other reviews: yt review .
  • Vendor specifications:
    • Sensitivity 83.0 dB
    • Impedance 8.0 Ohm
    • Size
      • Width 190.0mm
      • Height 362.0mm
      • Depth 26.0mm
    • Weight 9.5kg
Ascend Acoustics Sierra-LX
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 34.0 1.62 2.98
PK 67.0 2.08 -1.74
PK 139.0 0.65 -0.73
PK 621.0 0.84 0.49
PK 1381.0 2.01 -0.94
PK 2168.0 2.68 0.85
PK 14633.0 1.46 0.96
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Ascend Acoustics Sierra-LX
Graphic EQ 15 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.5
PK 63.0 2.14 -0.25
PK 100.0 2.14 -0.25
PK 160.0 2.14 0.0
PK 250.0 2.14 0.0
PK 400.0 2.14 0.0
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 0.25
PK 6300.0 2.14 0.0
PK 10000.0 2.14 0.0
PK 16000.0 2.14 0.25
Download
This EQ is designed for a 15 bands graphical EQ.
Ascend Acoustics Sierra-LX
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 -0.25
PK 125.0 4.32 -0.25
PK 160.0 4.32 -0.25
PK 200.0 4.32 -0.25
PK 250.0 4.32 -0.25
PK 315.0 4.32 0.0
PK 400.0 4.32 0.0
PK 500.0 4.32 0.0
PK 630.0 4.32 0.0
PK 800.0 4.32 0.25
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 0.25
PK 2500.0 4.32 0.25
PK 3150.0 4.32 0.0
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 0.25
PK 10000.0 4.32 0.25
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)
Ascend Acoustics Sierra-LX: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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