What we know about the measurement:

Ascend Acoustics CMT-340 SE2 is a passive bookshelves that cost around 350 USD each.

  • 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: 90.6dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 77.6Hz (resp. 64.5Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.2dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-80.0°, 70.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.52 and would be 8.18 with a perfect subwoofer.
      • Details: NBD: ON 0.326, LW 0.26, SP 0.335, PIR 0.267; SM: SP0.906, PIR0.909; LFQ 0.981, LFX 60Hz
    • Tonality (Preference) Score is 6.32 with an EQ and would be 8.45 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.279, LW 0.212, SP 0.314, PIR 0.229; SM: SP0.909, PIR0.93; LFQ 0.986, LFX 45Hz
Ascend Acoustics CMT-340 SE2
AutomaticEQ (IIR)
Set preamp gain to: -4.8dB.
Type Freq Q Gain
5 77.0 0.35 2.98
3 77.0 0.4 2.98
3 106.0 1.77 -2.72
3 143.0 1.41 -2.2
3 447.0 0.55 -0.55
3 511.0 2.48 1.63
3 739.0 1.94 -0.73
3 1594.0 0.55 0.82
3 9691.0 0.63 0.41
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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 CMT-340 SE2 filters_auto_eq

AutomaticEQ

Ascend Acoustics CMT-340 SE2 filters_eq_full

Target v.s. EQ

Ascend Acoustics CMT-340 SE2
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.5
3 100.0 2.14 0.0
3 160.0 2.14 -0.25
3 250.0 2.14 0.0
3 400.0 2.14 0.25
3 630.0 2.14 0.25
3 1000.0 2.14 0.25
3 1600.0 2.14 0.25
3 2500.0 2.14 0.25
3 4000.0 2.14 0.0
3 6300.0 2.14 0.0
3 10000.0 2.14 0.25
3 16000.0 2.14 0.5
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These EQ is designed for a 15 bands graphical EQ.

Ascend Acoustics CMT-340 SE2
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.5
3 31.0 4.32 0.5
3 40.0 4.32 0.5
3 50.0 4.32 0.5
3 63.0 4.32 0.5
3 80.0 4.32 0.25
3 100.0 4.32 0.0
3 125.0 4.32 -0.25
3 160.0 4.32 -0.25
3 200.0 4.32 0.0
3 250.0 4.32 0.0
3 315.0 4.32 0.0
3 400.0 4.32 0.25
3 500.0 4.32 0.25
3 630.0 4.32 0.25
3 800.0 4.32 0.25
3 1000.0 4.32 0.25
3 1250.0 4.32 0.25
3 1600.0 4.32 0.25
3 2000.0 4.32 0.25
3 2500.0 4.32 0.25
3 3150.0 4.32 0.0
3 4000.0 4.32 0.0
3 5000.0 4.32 0.0
3 6300.0 4.32 0.0
3 8000.0 4.32 0.25
3 10000.0 4.32 0.25
3 12000.0 4.32 0.25
3 16000.0 4.32 0.5
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Ascend Acoustics CMT-340 SE2: comparison between EQs
Ascend Acoustics CMT-340 SE2

Comparison betweens various EQs

Ascend Acoustics CMT-340 SE2

Improvements made by 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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