Home Theater Forum and Systems banner


  1. Single LLT vs dual sealed vs dual small ported

    DIY Subwoofers - General Discussion
    I built a 12 cubic foot LLT about 3 years ago and I am very happy with it. My issue now is that there is not much transparency with a single sub. If you sit in one corner the bass is amazing, but it drops off drastically as you move away from the corner. The LLT was my first build and I did not...
  2. Upper Range of Ported Build

    DIY Subwoofers - General Discussion
    I am contemplating building a ported box (7-10 cu. ft.) using the Dayton RSS390HF-4 15" driver. Goal is to run from 20hz-300hz so the box can be used with various Oris horns than can go down to 150hz-250hz. I would really like a LF section that could cover the 20hz-300hz range. Anybody have...
  3. Speaker Shaped like a car - Ported Exhaust - Bt and protable

    DIY Speakers
    I recently decided to build a custom bluetooth boombox that looked like the rear end of a super car. I didn't want it to look exactly like a current supercar, so I looked at some that I really liked and then added my own flare to it. Here are some quick notes about it. Kerf to get Curves...
  4. Dayton Ultimax 12" ported build

    DIY Subwoofers - General Discussion
    I'm planning a build with the Dayton Ultimax 12", and was hoping to get confirmation that my plans look ok. I've attached a WinISD model, using a 170 L (6 cu ft) ported box, tuned to 20 Hz, stuffed (Qa = 5) with a 20 Hz high-pass filter (I'll be using a DSP amp). There is a single port in the...
  5. Dayton Audio RSS315HO-4 passive radiator or ported?

    DIY Subwoofers - General Discussion
    Hi everyone i have been wanting to do a subwoofer diy build so i have found a Dayton Audio RSS315HO-4 and they have enclosures for them but they are sealed i i'm not a fan of sealed subwoofers but i have found that doing this subwoofer would be hard to do it as ported because of how long the...
  6. 18in ported tuned at 25-30hz

    Ported Subwoofer Build Projects
    Hi , i want to make a ported cabin with this speaker https://images4.static-thomann.de/pics/atg/atgdata/document/specs/215320.pdf but i want it to be shallow , in fact the shallowest that can be done ,(the minimum distance of the back wall~insulation to the magnet) and the total net volume...
  7. Behind the wall rss390-hf ported or 4th order

    DIY Subwoofers - General Discussion
    Im struggling to get a good box design that can place my existing sub (Dayton rss390-hf 15) in the closet and vent into the room. 4th order working within 11cf I get a peaky response between 20-40hz. Ported response is still a fantastic 20hz up and flat..But how does that then vent into the...
  8. Advice needed- Ported project to match Micca 5.0 set

    Ported Subwoofer Build Projects
    Howdy all! I was tasked with putting together a surround system on a real budget for my father in law. I decided to go with the fabled Micca amazon speakers. Just cause I want to hear them vs my little Polk T15 bookshelf speakers. Picked up 2 sets of the bookshelf Miccas and one center. For the...
  9. Oversized ported box - consequences to driver.

    DIY Subwoofers - General Discussion
    Hello all, There is a question I would like to ask. Having completed a 12 inch ported sub build, I was told by someone who knows more than I do that the box volume is way too big for the t/s parameters of the driver so if I play the sub at any substantial loudness the driver will...
  10. 22" cube or small ported

    DIY Subwoofers - General Discussion
    Hey everyone, trying to decide if there's a good reason to do 2 small ported subs over 22" sealed cubes for SI HT18s. They will be powered by a inuke 6000 with a minidsp. I can do 22" sealed cubes or something up to max dimensions of 22"H x 32"W x 24" D for a ported or sealed build. The room...
  11. ported attic subwoofer?

    DIY Subwoofers - General Discussion
    I see a lot of search results with manifolds and IB setups for attics but why not do a ported box instead?
  12. AE AV15-H Ported Box Size?

    DIY Subwoofers - General Discussion
    I have a couple of these drivers and was going to put them in to sealed enclosures, I used Unibox and with a 1000w input in a 1.98cu ft (56Lt) box it gave a QTC of 0.547 and reached xmax at 10Hz. The room I am going to be using will be approx 2000 cu ft. I started wondering if it would be...
  13. Ported box lining

    Ported Subwoofer Build Projects
    Should I put a lining on my ported box? I read it decreases upper end sensitivity. Anybody have any opinions or experiences with and without lining?. Thanks
  14. Dual SI D4 HT18s

    Ported Subwoofer Build Projects
    I just convinced my buddy to buy a couple Stereo Integrity D4 HT18s to complement the speakers he's getting installed in his basement. I was thinking that a good candidate for powering these would be an iNuke3000DSP. He's got time to order an amp, but with FREE shipping on the already...
  15. help with JL Audio 10w3v3 Ported Sub for home theater

    DIY Subwoofers - General Discussion
    This will be my 1st home speaker build. From what i have read home subs are a great starting point. My long term goal is to build all my speakers (using other's proven designs). 1st off I have built half a dozen or so car sub boxes with good results. I have always used the manufacturers...
  16. Um18 22 max spl ported

    DIY Subwoofers - General Discussion
    Hi guys I'm building a ported um 18 22 tuned to about 16hz in a 12cubic feet box. It seems to be less output than a pb13 ultra at 2metres from 20hz and up? Is this to be expected? Have I done something wrong?
  17. Ultimax 18 ported amp help

    Subwoofer Amps | High Pass Filters
    Hi I'm close to starting a ported sub build using an ultimax 18 tuned to 15hz. My problem at the moment is which amp to get. I am currently considering. I live in oz and all is expensive Dayton audio spa1000, rack amp ($580) Crown xls1000 or 1500 ( run bridge 4ohm)($500-$650) Crown xti...
  18. Ported how low is too low?

    Ported Subwoofer Build Projects
    Monday there will be a brand new Ftw21 sitting on my door step and this seems like a good time to ask a few thing's. First is at what point have you just ported a subwoofer just too low? I don't want to run a high pass filter if it can be avoided and I understand that there is a trade off of...
  19. Two ported, different size subs

    Ported Subwoofer Build Projects
    All, I currently am using a Fi Q15 in a sealed sub and am getting the itch to add more. I have thought about moving the Q15 to a MartySub configuration and also adding a SI HT18 and putting that in the Marty Full. Would the Q15 perform decently in the Marty Cube? I know I will have some work...
  20. 2x tc sounds lms ultra 18" ported for home theater

    Ported Subwoofer Build Projects
    Hey guys. I need help with diy a subwoofer box for my 2x tc sounds lms ultra 18". I want to go ported. I know some of you might recommend sealed. But, I previous had these subs on a ported box inside my van. I really enjoyed the deep bass and how linear this sub are. I live in an NYC apartment...