Hi Folks,
I’d like to share my experiences finding the “perfect” house curve - for my taste.
I included the curve definitions, so you can just copy-paste to a text file, import in HouseCurve and try out for yourself.
After some research regarding Floyd Tooles findings and recommendations I started out with a flat curve wit a 0.7 dB/oct slope:
Slope 0.7
Hz dB
12.5 2.8
25 2.1
50 1.4
100 0.7
200 0
400 -0.7
800 -1.4
1600 -2.1
3200 -2.8
6400 -3.5
12800 -4.2
25600 -4.9
This gives a very neutral presentation, tight bass and works very well with near to live volume levels around 85 dB SPL. Recommendations for a jaw dropping listen (crank it up 
):
- Lorde, Royals
- Billie Eilish, You should see me in a crown
- Trentemøller, Vamp
If you feel, you need more “air”, I recommend stopping the 0.7 dB/oct roll off at 4 kHz and keeping it flat from there:
Slope 0.7_brilliant
Hz dB
12.5 2.8
25 2.1
50 1.4
100 0.7
200 0
400 -0.7
800 -1.4
1600 -2.1
3200 -2.8
4000 -3
20000 -3
For listening at regular volume levels and less bass heavy music, the above shown curve sounds a bit thin, so it’s useful to include some bass boost.
Taking a closer look at the Harman target curve which takes into account the Fletcher/Munson curves of equal loudness perception (i.e. the sensitivity of the human ear at different SPL levels), I came up with an gradually increasing bass level starting from 200 Hz downwards to 50 Hz (2 octaves) and keep it flat from there down to 20 Hz.
For a 2+dB Bass boost at 50 Hz, use this curve:
Slope 0.7_2dB bassboost
Hz dB
20 3.4
50 3.4
100 1.7
200 0
400 -0.7
800 -1.4
1600 -2.1
3200 -2.8
6400 -3.5
12800 -4.2
25600 -4.9
To my ears, this sounds best at normal listening levels.
You can vary the level of bass boost to your taste and listenings habits by editing the values from 20Hz to 100 Hz as follows:
+1dB bass boost:
20 2.4
50 2.4
100 1.2
+3dB bass boost:
20 4.4
50 4.4
100 2.2
+4dB bass boost:
20 5.4
50 5.4
100 2.7
At very low listening levels (or with thin sounding 80’s pop) , the +4 dB version will be useful.
Of course this can also be combined with the above mentioned extra “air” above 4 kHz, which is recommended for lower listening levels:
Slope 0.7_2dB bassboost_brilliant
Hz dB
20 3.4
50 3.4
100 1.7
200 0
400 -0.7
800 -1.4
1600 -2.1
3200 -2.8
4000 -3
20000 -3
I hope this to be useful for others as a starting point for their own experiments.
Have fun and always keep an eye on the low frequency limits of you speakers and set the frequency range accordingly for filter calculation to avoid overload/damage to the woofer!
