i have made a 6cuft ported box for my 15" L7, out of 3/4" MDF and it pounds hard!! my lights shake, bedroom doors shake, my windows flexing (im using this @ home, powerd off of a 900w palstar power supply) but it is not musical, and the lows dont sound as low as they should b for a £250 sub, nd im thinking its coz i built the port like it showed me in the manual, and it is only about 16" long (depth) so i probably think that this is mostly 2 blame for poor sound Q. & the very strange thing is that the excursion can get up to 2cm sometimes @ playing around 80hz, but there is nearly no excursion wen playing @ 30/40hz??? CONFUSING!!! im sure its meant to be the other way around?? but ive looked all over the web @ hw 2 build proper ports with tuning frequencies @ 32hz, etc, but i really dont understand hw u tune a wooden box?? i think it has summin 2 do with the port being long/ short, but if it is this, hw do i know what frequency ive tuned it 2, if i make it shorter or longer?? so i looked around the web again, fr making a sealed enclosure, nd they say it has much better SQ (sound Quality) so im tempted to make a sealed 1, i also read in the manual about loosly filling the box with 50% poly fibre fill, nd i dont know what this is and wether you just ckuck a bag of it in the box, put the sub in and play sum music, or to glue the polyfibre dwn?? im confuzzled!!! i can do the wiring, simples, but the box making is so confusing!!! also hav heard that sealed boxes are less 'boomy' but to how much of an extent, and what difference in sound quality does filling the box with polyfibre fil make?? shud i just fill my current ported with it and see hw it sounds??? any suggestions plz (btw im using a vibe slick A7 amp with sub @1ohm, to power the beast, and that is connected to a 7.1chnl reciever by sony) im only 14 so i wont have as gooder knowledge on this stuff, as others do!!
thanks!!
also if anybody knows the excursion max for this sub, that would be great to, and if the excursion is one way or 'both ways' ( i dnot know what that means but i can found out later!!) thank you
thanks!!
also if anybody knows the excursion max for this sub, that would be great to, and if the excursion is one way or 'both ways' ( i dnot know what that means but i can found out later!!) thank you