What we know about the measurement:

LD Systems DDQ15 is an active liveportable that cost around 1800 USD each.

  • Quality of the measurement data is medium.
  • Origin of the data is LD Systems.
  • Format of the data is a GLL file .
  • -3dB (resp. -6db) point v.s. reference is at 47.5Hz (resp. 45.0Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.5dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.03 and would be 6.05 with a perfect subwoofer.
      • Details: NBD: ON 0.474, LW 0.587, SP 0.727, PIR 0.635; SM: SP0.776, PIR0.623; LFQ 1.977, LFX 42Hz
    • Tonality (Preference) Score is 5.26 with an EQ and would be 7.22 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.393, LW 0.463, SP 0.607, PIR 0.507; SM: SP0.919, PIR0.878; LFQ 1.977, LFX 41Hz
  • Link to original Review: ah review. Links to other reviews: pp review .
  • Note: measured with broadband noise at 2m. DUT is a DDQ12 with a DDQ Sub 212. It is unclear to me if the measurements are correct.
LD Systems DDQ15
AutomaticEQ (IIR)
Set preamp gain to: -3.2dB.
Type Freq Q Gain
5 58.0 0.55 2.91
3 96.0 1.06 -0.89
3 378.0 2.94 -2.07
3 478.0 0.9 2.89
3 584.0 2.96 -2.47
3 1103.0 2.7 2.62
3 3676.0 2.68 1.55
3 7173.0 2.29 -1.05
3 11077.0 1.3 -1.16
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

LD Systems DDQ15 filters_auto_eq

AutomaticEQ

LD Systems DDQ15 filters_eq_full

Target v.s. EQ

LD Systems DDQ15
Graphic EQ 15 bands
Set preamp gain to: -0.9dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.25
3 100.0 2.14 -0.25
3 160.0 2.14 0.0
3 250.0 2.14 0.25
3 400.0 2.14 0.25
3 630.0 2.14 0.25
3 1000.0 2.14 0.75
3 1600.0 2.14 0.5
3 2500.0 2.14 0.25
3 4000.0 2.14 0.5
3 6300.0 2.14 0.0
3 10000.0 2.14 0.0
3 16000.0 2.14 0.75
Download

These EQ is designed for a 15 bands graphical EQ.

LD Systems DDQ15
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
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 0.25
3 63.0 4.32 0.0
3 80.0 4.32 0.0
3 100.0 4.32 0.0
3 125.0 4.32 0.0
3 160.0 4.32 0.0
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 0.0
3 500.0 4.32 0.25
3 630.0 4.32 0.0
3 800.0 4.32 0.0
3 1000.0 4.32 0.5
3 1250.0 4.32 0.5
3 1600.0 4.32 0.5
3 2000.0 4.32 0.0
3 2500.0 4.32 0.0
3 3150.0 4.32 0.25
3 4000.0 4.32 0.25
3 5000.0 4.32 0.0
3 6300.0 4.32 -0.25
3 8000.0 4.32 0.0
3 10000.0 4.32 -0.25
3 12000.0 4.32 0.0
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.

LD Systems DDQ15: comparison between EQs
LD Systems DDQ15

Comparison betweens various EQs

LD Systems DDQ15

Improvements made by EQ
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
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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