What we know about the measurement:

Ascend Acoustics Sierra Duo V2 LCR Titan is a passive bookshelves that cost around 1338 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 .
  • Sensitivity: 86.1dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 79.1Hz (resp. 67.4Hz).
  • Reference level is normalised to -0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.7dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-60.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.16 and would be 7.78 with a perfect subwoofer.
      • Details: NBD: ON 0.396, LW 0.366, SP 0.393, PIR 0.334; SM: SP0.941, PIR0.897; LFQ 0.902, LFX 58Hz
    • Tonality (Preference) Score is 6.25 with an EQ and would be 8.5 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.278, LW 0.241, SP 0.314, PIR 0.227; SM: SP0.955, PIR0.945; LFQ 0.902, LFX 48Hz
  • Vendor specifications:
    • Sensitivity 86.0 dB
    • Impedance 8 Ohm
    • Size
      • Width 146mm
      • Height 412mm
      • Depth 152mm
    • Weight 5.4kg
Ascend Acoustics Sierra Duo V2 LCR Titan
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
PK 46.0 0.89 2.91
PK 80.0 2.71 2.84
PK 125.0 1.14 -3.12
PK 279.0 0.84 1.11
PK 792.0 2.77 1.98
PK 1381.0 0.32 -1.49
PK 2765.0 0.99 2.12
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Ascend Acoustics Sierra Duo V2 LCR Titan filters_auto_eq

AutomaticEQ

Ascend Acoustics Sierra Duo V2 LCR Titan filters_eq_full

Target v.s. EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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