Hi, I my first project has been a pair of small columns based on FaitalPro 3FE22. They were based on the AMLTL theory found in this post: https://www.diyaudio.com/community/threads/accidental-mltl-technique.231951
The volume was chosen based on simulations done in WINISD making the bass reflex tunning slighlty lower than optimal 90Hz or so, and then the dip in the mid bass was improved tunning the TL to 150HZ.
They ended up sounding quite good, I was not expecting that much bass for a 3' driver. The soundstage is really good, bass is lacking if they are placed on a table/shelf, good on the floor and almost too much near walls.
Bass Reflex port is rear facing so that front baffle can be bigger, I suppose this would be good, and also this placement was chosen so that any resonance is less heard.
The final version is more stuffed than these and the lateral has been glued for good. Now I am working in a 3 way design.
I want to thank eveyone in this forum, there is really valuable information.
Regards
The volume was chosen based on simulations done in WINISD making the bass reflex tunning slighlty lower than optimal 90Hz or so, and then the dip in the mid bass was improved tunning the TL to 150HZ.
They ended up sounding quite good, I was not expecting that much bass for a 3' driver. The soundstage is really good, bass is lacking if they are placed on a table/shelf, good on the floor and almost too much near walls.
Bass Reflex port is rear facing so that front baffle can be bigger, I suppose this would be good, and also this placement was chosen so that any resonance is less heard.
The final version is more stuffed than these and the lateral has been glued for good. Now I am working in a 3 way design.
I want to thank eveyone in this forum, there is really valuable information.
Regards
The port is 1cm in height, 9 width (similar to front baffle) and 1,2 depht. (0.39*3.54*0.47 in inches). I started with a longer slot for the port, but prefered the sound this way making the tunning higher (I started tryig to go below 80Hz but I prefered this).
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