What we know about the measurement:

JBL 4305P is an active bookshelves that cost around 2200 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 45.4Hz (resp. 42.5Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.5dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.39 and would be 7.4 with a perfect subwoofer.
      • Details: NBD: ON 0.332, LW 0.325, SP 0.368, PIR 0.371; SM: SP0.889, PIR0.716; LFQ 0.731, LFX 42Hz
    • Tonality (Preference) Score is 6.33 with an EQ and would be 8.35 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.293, LW 0.272, SP 0.333, PIR 0.257; SM: SP0.964, PIR0.934; LFQ 0.731, LFX 42Hz
  • Link to original Review: eac review. .
JBL 4305P
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
5 45.0 0.99 2.82
3 89.0 2.29 -0.71
3 320.0 2.86 0.71
3 668.0 1.44 1.1
3 1394.0 2.97 -2.19
3 2014.0 1.81 2.36
3 6069.0 1.72 -0.62
3 10713.0 2.6 -1.6
3 13092.0 0.56 -0.01
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

JBL 4305P filters_auto_eq

AutomaticEQ

JBL 4305P filters_eq_full

Target v.s. EQ

JBL 4305P
Graphic EQ 15 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.0
3 100.0 2.14 0.0
3 160.0 2.14 0.0
3 250.0 2.14 0.0
3 400.0 2.14 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 -0.25
3 1600.0 2.14 -0.25
3 2500.0 2.14 0.0
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 -0.25
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These EQ is designed for a 15 bands graphical EQ.

JBL 4305P
Graphic EQ 31 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.25
3 31.0 4.32 0.25
3 40.0 4.32 0.25
3 50.0 4.32 0.0
3 63.0 4.32 0.0
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 -0.25
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 0.0
3 630.0 4.32 0.0
3 800.0 4.32 0.0
3 1000.0 4.32 -0.25
3 1250.0 4.32 -0.25
3 1600.0 4.32 0.0
3 2000.0 4.32 0.25
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 -0.25
3 6300.0 4.32 -0.25
3 8000.0 4.32 -0.25
3 10000.0 4.32 -0.5
3 12000.0 4.32 -0.25
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.

JBL 4305P: comparison between EQs
JBL 4305P

Comparison betweens various EQs

JBL 4305P

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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