What we know about the measurement:

Polk Audio XT70 is a passive floorstanders that cost around 700 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 43.9Hz (resp. 41.0Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.9dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.55 and would be 6.5 with a perfect subwoofer.
      • Details: NBD: ON 0.48, LW 0.423, SP 0.348, PIR 0.34; SM: SP0.76, PIR0.444; LFQ 1.293, LFX 41Hz
    • Tonality (Preference) Score is 6.06 with an EQ and would be 7.93 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.409, LW 0.368, SP 0.338, PIR 0.288; SM: SP0.93, PIR0.921; LFQ 1.293, LFX 39Hz
  • Link to original Review: eac review. .
Polk Audio XT70
AutomaticEQ (IIR)
Set preamp gain to: -2.1dB.
Type Freq Q Gain
PK 41.0 0.27 2.76
PK 69.0 1.13 -4.26
PK 279.0 2.99 -2.76
PK 289.0 1.0 0.85
PK 2964.0 1.67 0.73
PK 4989.0 1.44 -1.71
PK 11085.0 1.01 -2.91
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Polk Audio XT70
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
PK 25.0 2.14 0.25
PK 40.0 2.14 0.25
PK 63.0 2.14 -0.25
PK 100.0 2.14 -0.25
PK 160.0 2.14 0.0
PK 250.0 2.14 -0.25
PK 400.0 2.14 0.0
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.0
PK 1600.0 2.14 0.0
PK 2500.0 2.14 -0.25
PK 4000.0 2.14 -0.25
PK 6300.0 2.14 -0.5
PK 10000.0 2.14 -0.5
PK 16000.0 2.14 -0.25
Download
This EQ is designed for a 15 bands graphical EQ.
Polk Audio XT70
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 0.0
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 0.0
PK 200.0 4.32 0.0
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 0.0
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.25
PK 2000.0 4.32 0.25
PK 2500.0 4.32 0.0
PK 3150.0 4.32 0.0
PK 4000.0 4.32 -0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 -0.5
PK 10000.0 4.32 -0.5
PK 12000.0 4.32 -0.5
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.
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 XT70: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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