Theory Audio SB25 is a passive bookshelves that cost around 1700 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity:
    • Company: 94 dB
    • Measured: 86.0 dB (avg. 300Hz-3kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 67.4Hz (resp. 60.1Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.4dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.59 and would be 7.25 with a perfect subwoofer.
      • Details: NBD: ON 0.366, LW 0.355, SP 0.47, PIR 0.398; SM: SP0.795, PIR0.723; LFQ 1.163, LFX 60Hz
    • Tonality (Preference) Score is 5.66 with an EQ and would be 8.18 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.295, LW 0.252, SP 0.382, PIR 0.308; SM: SP0.928, PIR0.929; LFQ 1.163, LFX 55Hz
  • Link to original Review: asr review. .
Theory Audio SB25

Vendor specifications

  • Dispersion: 120° horizontal and 40° vertical.
  • Impedance 4 Ohm
  • SPL
    • peak: 117 dB
  • Size
    • Width 243mm
    • Height 546mm
    • Depth 96mm
  • Weight 11kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -2.2dB.
Type Freq Q Gain
PK 56.0 2.99 2.85
PK 178.0 0.26 -0.97
PK 1244.0 3.0 -2.79
PK 1480.0 1.26 2.99
PK 4342.0 1.96 -2.08
PK 6818.0 2.23 -1.11
PK 12301.0 2.96 -1.33
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Graphic EQ 15 bands
Set preamp gain to: -0.9dB.
Type Freq Q Gain
PK 25.0 2.14 0.75
PK 40.0 2.14 0.75
PK 63.0 2.14 0.25
PK 100.0 2.14 0.0
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 0.0
PK 1000.0 2.14 0.25
PK 1600.0 2.14 0.5
PK 2500.0 2.14 0.25
PK 4000.0 2.14 -0.25
PK 6300.0 2.14 -0.25
PK 10000.0 2.14 -0.5
PK 16000.0 2.14 0.0
Download
This EQ is designed for a 15 bands graphical EQ.
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 0.5
PK 63.0 4.32 0.25
PK 80.0 4.32 0.25
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 0.25
PK 400.0 4.32 0.25
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 0.0
PK 1250.0 4.32 0.25
PK 1600.0 4.32 0.25
PK 2000.0 4.32 0.0
PK 2500.0 4.32 0.25
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 -0.25
PK 10000.0 4.32 -0.25
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.0
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
Quick config:
Quick config:
Quick config:
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