What we know about the measurement:

JBL 305P Mark ii is an active bookshelves that cost around 300 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 51.3Hz (resp. 46.9Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.3dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.89 and would be 7.02 with a perfect subwoofer.
      • Details: NBD: ON 0.365, LW 0.323, SP 0.279, PIR 0.282; SM: SP0.805, PIR0.472; LFQ 0.45, LFX 45Hz
    • Tonality (Preference) Score is 6.47 with an EQ and would be 8.54 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.304, LW 0.24, SP 0.234, PIR 0.203; SM: SP0.979, PIR0.96; LFQ 0.45, LFX 43Hz
  • Link to original Review: eac review. Links to other reviews: asr review .
  • Vendor specifications:
    • Dispersion: 120° horizontal and 90° vertical.
    • Sensitivity 92 dB
    • SPL
      • max: 94 dB
      • peak: 108 dB
    • Size
      • Width 185mm
      • Height 298mm
      • Depth 231 mm)
    • Weight 4.73 kg
JBL 305P Mark ii
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
5 51.0 1.27 2.96
3 117.0 0.64 -0.68
3 245.0 2.6 0.92
3 547.0 1.18 1.75
3 1261.0 2.27 2.07
3 1704.0 2.7 -2.1
3 2014.0 2.61 1.87
3 2631.0 0.73 -0.37
3 12246.0 0.29 -1.48
Download

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

JBL 305P Mark ii filters_auto_eq

AutomaticEQ

JBL 305P Mark ii filters_eq_full

Target v.s. EQ

JBL 305P Mark ii
flipflop@ASR (IIR)
Set preamp gain to: -1.1dB.
Type Freq Q Gain
3 343.0 10.0 0.2
3 416.0 5.0 0.5
3 526.0 7.5 0.9
3 656.0 4.5 1.1
3 790.0 6.5 -0.9
3 1142.0 10.0 0.9
3 1376.0 10.0 0.3
3 1742.0 7.0 -3.1
3 2080.0 6.0 -0.3
3 2500.0 4.0 -1.0
3 3300.0 3.5 -3.0
3 4250.0 4.0 -0.9
3 5080.0 3.3 -2.9
3 6850.0 4.8 -2.6
3 8000.0 10.0 1.2
3 8700.0 4.0 -2.7
3 10000.0 8.0 0.8
3 10640.0 4.0 -2.2
3 13000.0 12.0 -0.3
3 16500.0 1.0 -5.5
Download

These EQ is designed by ASR member flipflop.

JBL 305P Mark ii
Graphic EQ 15 bands
Set preamp gain to: -0.2dB.
Type Freq Q Gain
3 25.0 2.14 0.0
3 40.0 2.14 0.25
3 63.0 2.14 -0.25
3 100.0 2.14 -0.25
3 160.0 2.14 -0.25
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 -0.25
3 4000.0 2.14 -0.5
3 6300.0 2.14 -0.5
3 10000.0 2.14 -0.75
3 16000.0 2.14 -0.75
Download

These EQ is designed for a 15 bands graphical EQ.

JBL 305P Mark ii
Graphic EQ 31 bands
Set preamp gain to: -0.2dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.0
3 31.0 4.32 0.0
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 -0.25
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 0.0
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 0.0
3 1250.0 4.32 0.0
3 1600.0 4.32 -0.25
3 2000.0 4.32 -0.25
3 2500.0 4.32 -0.25
3 3150.0 4.32 -0.5
3 4000.0 4.32 -0.5
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.5
3 8000.0 4.32 -0.5
3 10000.0 4.32 -0.75
3 12000.0 4.32 -0.75
3 16000.0 4.32 -0.75
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

JBL 305P Mark ii: comparison between EQs
JBL 305P Mark ii

Comparison betweens various EQs

JBL 305P Mark ii

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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