What we know about the measurement:

Theory Audio SB25 is an active bookshelves

  • Quality of the measurement data is high.
  • Origin of the data is Theory Audio.
  • Format of the data is a GLL file .
  • -3dB (resp. -6db) point v.s. reference is at 60.0Hz (resp. 56.0Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.1dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 60.0°) 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 4.61 and would be 7.14 with a perfect subwoofer.
      • Details: NBD: ON 0.354, LW 0.329, SP 0.456, PIR 0.384; SM: SP0.775, PIR0.645; LFQ 1.12, LFX 56Hz
    • Tonality (Preference) Score is 5.55 with an EQ and would be 8.03 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.339, LW 0.305, SP 0.382, PIR 0.314; SM: SP0.928, PIR0.921; LFQ 1.12, LFX 54Hz
  • Vendor specifications:
    • Dispersion: 120° horizontal and 40° vertical.
    • Sensitivity 94 dB
    • Impedance 4 Ohm
    • SPL
      • peak: 117 dB
    • Size
      • Width 243mm
      • Height 546mm
      • Depth 96 mm)
    • Weight 11 kg
Theory Audio SB25
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
5 60.0 1.01 2.82
3 164.0 2.81 -0.75
3 207.0 1.24 1.67
3 494.0 2.5 1.57
3 933.0 2.95 1.88
3 1594.0 2.84 2.21
3 2461.0 2.86 1.84
3 3438.0 0.27 -1.22
5 4202.0 1.23 -0.16
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Theory Audio SB25 filters_auto_eq

AutomaticEQ

Theory Audio SB25 filters_eq_full

Target v.s. EQ

Theory Audio SB25
Graphic EQ 15 bands
Set preamp gain to: -0.9dB.
Type Freq Q Gain
3 25.0 2.14 0.75
3 40.0 2.14 0.75
3 63.0 2.14 0.25
3 100.0 2.14 0.0
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 0.0
3 1000.0 2.14 0.25
3 1600.0 2.14 0.5
3 2500.0 2.14 0.25
3 4000.0 2.14 -0.25
3 6300.0 2.14 -0.25
3 10000.0 2.14 -0.5
3 16000.0 2.14 0.0
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These EQ is designed for a 15 bands graphical EQ.

Theory Audio SB25
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 0.5
3 63.0 4.32 0.25
3 80.0 4.32 0.25
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 0.25
3 400.0 4.32 0.25
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 0.0
3 1250.0 4.32 0.25
3 1600.0 4.32 0.25
3 2000.0 4.32 0.0
3 2500.0 4.32 0.25
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 -0.25
3 10000.0 4.32 -0.25
3 12000.0 4.32 0.0
3 16000.0 4.32 0.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Theory Audio SB25: comparison between EQs
Theory Audio SB25

Comparison betweens various EQs

Theory Audio SB25

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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