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.
  • 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
LS 58.0 0.55 2.91
PK 96.0 1.06 -0.89
PK 378.0 2.94 -2.07
PK 478.0 0.9 2.89
PK 584.0 2.96 -2.47
PK 1103.0 2.7 2.62
PK 3676.0 2.68 1.55
PK 7173.0 2.29 -1.05
PK 11077.0 1.3 -1.16
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.
LD Systems DDQ15
Graphic EQ 15 bands
Set preamp gain to: -0.9dB.
Type Freq Q Gain
PK 25.0 2.14 0.25
PK 40.0 2.14 0.25
PK 63.0 2.14 0.25
PK 100.0 2.14 -0.25
PK 160.0 2.14 0.0
PK 250.0 2.14 0.25
PK 400.0 2.14 0.25
PK 630.0 2.14 0.25
PK 1000.0 2.14 0.75
PK 1600.0 2.14 0.5
PK 2500.0 2.14 0.25
PK 4000.0 2.14 0.5
PK 6300.0 2.14 0.0
PK 10000.0 2.14 0.0
PK 16000.0 2.14 0.75
Download
This 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
PK 20.0 4.32 0.0
PK 25.0 4.32 0.5
PK 31.0 4.32 0.5
PK 40.0 4.32 0.5
PK 50.0 4.32 0.25
PK 63.0 4.32 0.0
PK 80.0 4.32 0.0
PK 100.0 4.32 0.0
PK 125.0 4.32 0.0
PK 160.0 4.32 0.0
PK 200.0 4.32 0.0
PK 250.0 4.32 0.0
PK 315.0 4.32 0.0
PK 400.0 4.32 0.0
PK 500.0 4.32 0.25
PK 630.0 4.32 0.0
PK 800.0 4.32 0.0
PK 1000.0 4.32 0.5
PK 1250.0 4.32 0.5
PK 1600.0 4.32 0.5
PK 2000.0 4.32 0.0
PK 2500.0 4.32 0.0
PK 3150.0 4.32 0.25
PK 4000.0 4.32 0.25
PK 5000.0 4.32 0.0
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 0.0
PK 10000.0 4.32 -0.25
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.5
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
LD Systems DDQ15: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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