What we know about the measurement:

ATC SCM19 v1 is a passive bookshelves that cost around 4000 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 83.4dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 120.1Hz (resp. 55.7Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.6dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 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 4.55 and would be 6.97 with a perfect subwoofer.
      • Details: NBD: ON 0.386, LW 0.347, SP 0.327, PIR 0.305; SM: SP0.751, PIR0.502; LFQ 1.078, LFX 52Hz
    • Tonality (Preference) Score is 6.73 with an EQ and would be 8.54 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.293, LW 0.237, SP 0.258, PIR 0.21; SM: SP0.952, PIR0.955; LFQ 0.942, LFX 38Hz
  • Link to Original review.
ATC SCM19 v1
AutomaticEQ (IIR)
Set preamp gain to: -5.2dB.
Type Freq Q Gain
5 120.0 1.04 2.74
3 207.0 1.87 0.47
3 646.0 2.98 -2.75
3 1032.0 1.39 -2.8
3 3438.0 2.57 -2.32
3 4966.0 2.89 -2.45
5 16000.0 1.29 2.43
Download

These EQ optimise the Harman score and is a good start for far field listening like in your living room.

ATC SCM19 v1 filters_auto_eq

AutomaticEQ

ATC SCM19 v1 filters_eq_full

Target v.s. EQ

ATC SCM19 v1
flipflop@ASR (IIR)
Set preamp gain to: -1.9dB.
Type Freq Q Gain
3 325.0 10.0 -1.0
3 345.0 4.0 1.2
3 408.0 7.0 -1.4
3 482.0 30.0 1.6
3 541.0 8.0 -0.5
3 603.0 5.0 -1.9
3 675.0 5.0 -1.7
3 945.0 1.372 -3.3
3 985.0 10.0 -0.5
3 1131.0 10.0 0.7
3 1265.0 20.0 -0.6
3 1580.0 20.0 -0.8
3 1820.0 15.0 -0.5
3 2800.0 7.0 -0.4
3 3137.0 1.001 -1.5
3 4200.0 10.0 0.7
3 5020.0 5.0 -0.7
3 6180.0 7.0 1.0
3 7460.0 5.0 2.1
3 12250.0 5.0 1.5
Download

These EQ is designed by ASR member flipflop.

ATC SCM19 v1
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 0.5
3 160.0 2.14 0.5
3 250.0 2.14 0.5
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 0.25
3 10000.0 2.14 0.25
3 16000.0 2.14 0.5
Download

These EQ is designed for a 15 bands graphical EQ.

ATC SCM19 v1
Graphic EQ 31 bands
Set preamp gain to: -1.2dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.75
3 31.0 4.32 0.75
3 40.0 4.32 0.75
3 50.0 4.32 0.75
3 63.0 4.32 0.75
3 80.0 4.32 0.75
3 100.0 4.32 0.75
3 125.0 4.32 0.75
3 160.0 4.32 0.75
3 200.0 4.32 0.75
3 250.0 4.32 0.5
3 315.0 4.32 0.5
3 400.0 4.32 0.25
3 500.0 4.32 0.25
3 630.0 4.32 -0.5
3 800.0 4.32 -0.25
3 1000.0 4.32 -0.25
3 1250.0 4.32 0.0
3 1600.0 4.32 0.0
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 0.25
3 5000.0 4.32 0.25
3 6300.0 4.32 0.75
3 8000.0 4.32 0.75
3 10000.0 4.32 0.5
3 12000.0 4.32 0.75
3 16000.0 4.32 1.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

ATC SCM19 v1: comparison between EQs
ATC SCM19 v1

Comparison betweens various EQs

ATC SCM19 v1

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
Frequency Frequency with EQ
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