What we know about the measurement:

Ascend Acoustics Sierra 1 V2 is a passive bookshelves that cost around 998 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 53.0Hz (resp. 45.0Hz).
  • Reference level is normalised to -0.4dB 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 6.7 and would be 8.65 with a perfect subwoofer.
      • Details: NBD: ON 0.309, LW 0.22, SP 0.21, PIR 0.17; SM: SP0.985, PIR0.97; LFQ 0.524, LFX 41Hz
    • Tonality (Preference) Score is 7.04 with an EQ and would be 8.82 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.249, LW 0.181, SP 0.22, PIR 0.161; SM: SP0.957, PIR0.965; LFQ 0.524, LFX 37Hz
  • Link to original Review: eac review. Links to other reviews: yt review , history review , asr review .
  • Vendor specifications:
    • Sensitivity 83 dB
    • Impedance 8 Ohm
    • Size
      • Width 190mm
      • Height 362mm
      • Depth 267mm
    • Weight 8.4kg
Ascend Acoustics Sierra 1 V2
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
PK 41.0 0.78 2.98
PK 83.0 1.66 -1.56
PK 211.0 1.58 0.9
PK 289.0 2.9 0.59
PK 1244.0 2.23 -0.68
PK 3405.0 2.21 1.2
PK 5536.0 2.26 0.81
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
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)
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