Ascend Acoustics CBM-170 SE2 is a passive bookshelves that cost around 468 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:
    • Company: 87.0 dB
    • Measured: 86.8 dB (avg. 300Hz-3kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 68.8Hz (resp. 58.6Hz).
  • Reference level is normalised to -0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.5dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.81 and would be 8.17 with a perfect subwoofer.
      • Details: NBD: ON 0.248, LW 0.225, SP 0.231, PIR 0.187; SM: SP0.431, PIR0.72; LFQ 0.681, LFX 51Hz
    • Tonality (Preference) Score is 6.33 with an EQ and would be 8.41 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.208, LW 0.183, SP 0.224, PIR 0.158; SM: SP0.433, PIR0.74; LFQ 0.875, LFX 43Hz
Ascend Acoustics CBM-170 SE2

Vendor specifications

  • Impedance 8 Ohm
  • Size
    • Width 229mm
    • Height 305mm
    • Depth 241mm
  • Weight 6.8kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
PK 69.0 0.41 2.97
PK 83.0 0.4 1.75
PK 109.0 0.92 -4.43
PK 879.0 1.38 -1.41
PK 1161.0 1.13 0.77
PK 6361.0 1.49 -0.91
PK 7834.0 1.49 1.01
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.

Quick config:
Quick config:
Quick config:
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