What we know about the measurement:

Wharfedale Diamond 12.1 is a passive bookshelves that cost around 800 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: 84.7dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 64.5Hz (resp. 54.2Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.7dB 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 5.29 and would be 7.7 with a perfect subwoofer.
      • Details: NBD: ON 0.388, LW 0.302, SP 0.323, PIR 0.272; SM: SP0.856, PIR0.777; LFQ 0.389, LFX 52Hz
    • Tonality (Preference) Score is 6.17 with an EQ and would be 8.37 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.356, LW 0.258, SP 0.279, PIR 0.218; SM: SP0.957, PIR0.96; LFQ 0.377, LFX 46Hz
  • Link to Original review.
Wharfedale Diamond 12.1
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
5 81.0 0.47 2.98
3 181.0 0.43 -0.97
3 280.0 1.72 1.0
3 494.0 1.16 -0.38
3 1704.0 2.72 2.3
3 2813.0 2.43 1.04
3 3676.0 2.58 -1.21
3 5677.0 2.16 -1.62
3 16000.0 0.98 -0.64
Download

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

Wharfedale Diamond 12.1 filters_auto_eq

AutomaticEQ

Wharfedale Diamond 12.1 filters_eq_full

Target v.s. EQ

Wharfedale Diamond 12.1
Graphic EQ 15 bands
Set preamp gain to: -0.8dB.
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 -0.25
3 160.0 2.14 -0.25
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 0.0
3 1600.0 2.14 0.75
3 2500.0 2.14 0.5
3 4000.0 2.14 -0.25
3 6300.0 2.14 -0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.25
Download

These EQ is designed for a 15 bands graphical EQ.

Wharfedale Diamond 12.1
Graphic EQ 31 bands
Set preamp gain to: -0.9dB.
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 0.5
3 80.0 4.32 0.0
3 100.0 4.32 -0.25
3 125.0 4.32 -0.25
3 160.0 4.32 -0.25
3 200.0 4.32 -0.25
3 250.0 4.32 -0.25
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 -0.25
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 0.75
3 2000.0 4.32 0.5
3 2500.0 4.32 0.5
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 -0.25
3 8000.0 4.32 0.0
3 10000.0 4.32 0.0
3 12000.0 4.32 0.0
3 16000.0 4.32 0.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Wharfedale Diamond 12.1: comparison between EQs
Wharfedale Diamond 12.1

Comparison betweens various EQs

Wharfedale Diamond 12.1

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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