The bass extension of the M-Audio Av40 4 inches driver is described as : 85 hertz...
In 50 hertz test tone i feel the sound... 😁
What did i did ?
I increase the volume of the rear port-hole with full lenght straws (17 ) glued together and put inside...I had modified the volume and neck of what is called in acoustic an Helmholtz resonator... each speakers is a resonator... ( i tuned 100 resonators in my past acoustic room by the way )
The highs are clear as crystals also , i help the focus and separation with a cardboard empty paper roll around the twitter...I know it is not esthetical! But i dont give a damn... And i am proud of my homemade acoustic tricks...
Imaging is very improved now... Soundstage too...
The mids and human voice are fluids and perfect and saxophone feel as one real one ...
Cost of speakers 12 years ago : 100 bucks
I just test the bass with this:
And i felt the bass physically, i just listen to this right now and i miss nothing :
https://www.youtube.com/watch?v=FZ0mBQsrbqc&list=PLnQJF3Qi_4_DT_NKFgfSy7pLhHb9W9Dka&index=107
I damped the box with concrete and isolate them and use my homemade designed "Golden plates" on the cables connections and dac to improve the texture of the sound... ( shungite+ copper plate ) ... I put them in a dedicated acoustic corner...
These small active box are so good now that even Steve Guttenberg who reviewed them and gave them 8 on 10 , 12 years ago, will be amazed...I was not so much amazed BEFORE my embeddings controls this month... I had no more any other choice of speakers this is why i thought about their optimization... I succeeded ... What is a basic good small box is now a fantastic cheap pair of speakers almost audiophile... I will not upgrade because i am afraid to do so UNDER 1000 bucks...
There is no relation between the sound right out of the box and now...
Then in audio before upgrading you must embed all components right and surprize! upgrading is no more so appealling or necessary...
No subwoofer is needed for me and for most music...