Hey folks…..modest family room 5.1 system needs some added ooomf. Currently there’s two DIY 10” small ported that give an in room f3 around 40hz. I wanna fill in the bottom to say an f3 of 20hz. My thought was adding a third sub 15”……high excursion high power small box type with 1000w or so…….mix it in with a low pass filter set at 40hz or so with a subsonic cutoff at 20hz…….really narrow passband and have enough current on tap to get the job done…..90db or so at 25hz. Is this the best way to go at this or is a large low tuned ported a better option? The driver have in mind for that would need 4.5cuft for an f3 tuned to 25hz using a slot port equivalent to a 6” round
BP4, BP6, TL, MLTL, TH, even sealed if there's enough power handling + room/corner gain, though due to our poor hearing acuity down low, 90 dB peaks needs to be THX, Dolby ref. 115 dB for same perceived SPL, so got a corner or lay down along a wall or my fave, behind the listening position, for some 'flavor' of long or two fold LFE cab to ensure a large, long enough 'vent' (at least Av = Sd)?
Thanks GM…..I’m thinking sealed as well for a corner placement and boundary gain. Rms of the driver is 1000w so power handling requirements met. Excursion well within the 21mm Ptp spec at 25hz…..room gain should take care of the rest. Mind you I’ve never done it this way in a home…..supplementing midbass….it’s always been 2-4 identical units with a 2 octave passband. I’m thinking to block off the ports of the existing 10’s and see what that looks like
A "ULF" subwoofer is actually a speaker that can go below 20Hz.
This takes output into the region called: INFRASONIC
https://en.wikipedia.org/wiki/Infrasound
PS.
Most (but not all) consumer sound sources have these frequencies reduced or removed altogether.
This takes output into the region called: INFRASONIC
https://en.wikipedia.org/wiki/Infrasound
PS.
Most (but not all) consumer sound sources have these frequencies reduced or removed altogether.