What we know about the measurement:

Polk Audio Atrium 4 is a passive outdoor that cost around 117 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 .
  • -3dB (resp. -6db) point v.s. reference is at 112.8Hz (resp. 98.1Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.5dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 0.86 and would be 4.5 with a perfect subwoofer.
      • Details: NBD: ON 0.743, LW 0.63, SP 0.552, PIR 0.531; SM: SP0.456, PIR0.111; LFQ 0.368, LFX 101Hz
    • Tonality (Preference) Score is 4.61 with an EQ and would be 7.68 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.545, LW 0.42, SP 0.337, PIR 0.26; SM: SP0.935, PIR0.92; LFQ 0.325, LFX 74Hz
  • Link to Original review.
Polk Audio Atrium 4
AutomaticEQ (IIR)
Set preamp gain to: -4.9dB.
Type Freq Q Gain
PK 83.0 1.28 2.99
PK 113.0 0.28 2.99
PK 160.0 1.35 -4.82
PK 395.0 2.84 1.35
PK 1954.0 2.39 2.99
PK 2670.0 0.37 -2.7
PK 7566.0 1.13 -5.66
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Polk Audio Atrium 4
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.5
PK 63.0 2.14 0.5
PK 100.0 2.14 0.5
PK 160.0 2.14 -0.25
PK 250.0 2.14 0.0
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 0.0
PK 2500.0 2.14 0.0
PK 4000.0 2.14 -0.5
PK 6300.0 2.14 -1.0
PK 10000.0 2.14 -0.75
PK 16000.0 2.14 0.75
Download
This EQ is designed for a 15 bands graphical EQ.
Polk Audio Atrium 4
Graphic EQ 31 bands
Set preamp gain to: -0.4dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.25
PK 31.0 4.32 0.25
PK 40.0 4.32 0.25
PK 50.0 4.32 0.25
PK 63.0 4.32 0.25
PK 80.0 4.32 0.25
PK 100.0 4.32 0.25
PK 125.0 4.32 0.0
PK 160.0 4.32 -0.25
PK 200.0 4.32 -0.25
PK 250.0 4.32 0.0
PK 315.0 4.32 0.0
PK 400.0 4.32 0.0
PK 500.0 4.32 0.0
PK 630.0 4.32 0.0
PK 800.0 4.32 -0.25
PK 1000.0 4.32 -0.25
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 -0.5
PK 4000.0 4.32 -0.5
PK 5000.0 4.32 -0.75
PK 6300.0 4.32 -1.0
PK 8000.0 4.32 -1.0
PK 10000.0 4.32 -0.75
PK 12000.0 4.32 -0.5
PK 16000.0 4.32 0.25
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
Polk Audio Atrium 4: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
;