You get 3 EQs:
v1: optimise for PIR -> too many PEQs around the crossover that may not work
v2a: optimise for PIR but smooth target -> better but still too many small and peaky PEQs
v2b: remove the last PEQs and keep only the first 3 from v2a -> recommended EQ.
edit V2a
Preference score
4.8 and
6.9 with a sub
with an EQ
6.1 and
8.2 with both
I added some smoothing to the eq designed in V1. This yield a lower score but more realistic as it is less sharp around the crossover and both LW and PIR looks good.
Code:
EQ for KEF Q150 computed from ErinsAudioCorner data
Preference Score 4.8 with EQ 6.2
Generated from http://github.com/pierreaubert/spinorama/generate_peqs.py v0.14
Dated: 2022-03-01-14:04:03
Preamp: -0.5 dB
Filter 1: ON PK Fc 13062 Hz Gain -4.34 dB Q 0.50
Filter 2: ON PK Fc 164 Hz Gain -1.36 dB Q 1.50
Filter 3: ON PK Fc 951 Hz Gain -1.63 dB Q 2.28
Filter 4: ON PK Fc 2528 Hz Gain +0.63 dB Q 3.99
Filter 5: ON PK Fc 1022 Hz Gain +1.29 dB Q 4.00
Filter 6: ON PK Fc 1177 Hz Gain -1.43 dB Q 3.98
Filter 7: ON PK Fc 792 Hz Gain -0.73 dB Q 3.97
Filter 8: ON PK Fc 1067 Hz Gain +1.01 dB Q 3.95
Filter 9: ON PK Fc 1568 Hz Gain +0.70 dB Q 3.98
View attachment 189910
V2b
If you look at the EQ, you see that all the last one have low gain and high Q. You can remove all of them and get most of the benefit from the EQ. Here are the results with 3 PEQs and that's my recommended one:
Preference score
4.8 and
6.9 with a sub
with an EQ
5.7 and
7.8 with both
Code:
EQ for KEF Q150 computed from ErinsAudioCorner data
Preference Score 4.8 with EQ 5.7
Generated from http://github.com/pierreaubert/spinorama/generate_peqs.py v0.14
Dated: 2022-03-01-14:06:26
Preamp: -0.2 dB
Filter 1: ON PK Fc 13243 Hz Gain -4.37 dB Q 0.49
Filter 2: ON PK Fc 165 Hz Gain -1.30 dB Q 1.40
Filter 3: ON PK Fc 951 Hz Gain -1.63 dB Q 2.29
View attachment 189912
V1
Preference score
4.8 and
6.9 with a sub
with an EQ
6.9 and
8.2 with both
I optimised for flat LW and smooth PIR. The automated algorithm is optimising around 1kHz and it should not. The huge variations around the crossover are likely to drive a non minimal phase behaviour that IIR eq cannot correct. So the scores post EQ are likely to be optimistic.
Code:
EQ for KEF Q150 computed from ErinsAudioCorner data
Preference Score 4.8 with EQ 6.1
Generated from http://github.com/pierreaubert/spinorama/generate_peqs.py v0.14
Dated: 2022-02-27-18:03:10
Preamp: -0.7 dB
Filter 1: ON PK Fc 12987 Hz Gain -3.99 dB Q 0.60
Filter 2: ON PK Fc 159 Hz Gain -1.36 dB Q 1.67
Filter 3: ON PK Fc 951 Hz Gain -1.73 dB Q 3.67
Filter 4: ON PK Fc 1012 Hz Gain +1.44 dB Q 3.99
Filter 5: ON PK Fc 1188 Hz Gain -1.80 dB Q 3.99
Filter 6: ON PK Fc 1339 Hz Gain +1.35 dB Q 3.37
Filter 7: ON PK Fc 805 Hz Gain -1.09 dB Q 3.99
Filter 8: ON PK Fc 1279 Hz Gain -0.93 dB Q 3.99
Filter 9: ON PK Fc 1054 Hz Gain +1.40 dB Q 3.98
View attachment 189528