Does anyone have experience with having the bass go directly into the floor so that the sound only comes out of a small crack. Tune audio uses that principle a lot. On their Anima, however, they have the bass at the top, with the sound only coming out just above the floor via the cabinet, which is a horn. I am considering trying something similar, however not with the bass at the top but with the bass just above the floor and then the cabinet upwards. It is only for the deep bass maybe max 200 Hz or less. It naturally provides some amplification, but it is also a nuanced and fast bass, it should not just be fullness and hum.
Yesm there are a number of threads that touch on this. The floor adds mass-loading if you get close enuff.
dave
dave
Hi, I built a pair of 4 way horns along the lines of Tune Anima - some details here - https://www.diyaudio.com/community/threads/a-4-way-horn-speaker.337716/
I had the bass going down, because it is more stable and the vertical horn, then allowed me to fasten the other horns to it.
More details here - https://www.diyaudio.com/community/threads/system-pictures-description.23208/page-172#post-6517066
I was told max crossover to be @ 250 Hz, because you don't want male vocals through it
Mr BA
I had the bass going down, because it is more stable and the vertical horn, then allowed me to fasten the other horns to it.
More details here - https://www.diyaudio.com/community/threads/system-pictures-description.23208/page-172#post-6517066
I was told max crossover to be @ 250 Hz, because you don't want male vocals through it
Mr BA
Thanks for sharing your thread BA. I haven't been able to find so many threads on it, maybe because I don't know the right English words to search for. Horns are completely new to me but have made a few pieces (nort hole speakers just horns), though not for bass. However, what I had in mind was just a conventional cabinet either closed or bass reflex, but where it is upside down just like Tune. So the cabinet is up and the bass close to the floor (Tune the bass is at the top but playing down). I would like to hear experiences with how close you can go, and whether it is an advantage to go very close. I can understand from the little I have read that it has something to do with the bass only "seeing" a small amount of air in front of it, so it seems a bit like a mass loading. But those things are new to me so I need to do some more research. Was your speaker good. My thought is a 2 way system but then feed this subwoofer inside the cabinet (2,5 way). I would also like to know if all basses can be used, or if it has to have low or high Q and things like that. The two-way system I have is of course not bass-strong, but I don't really think there is anything missing, but when I measure it, I can see that even at 50 Hz there is not much bass left, so a sub at the bottom could give it a boost. But it must be "quality sound" not just noisy bass.
With normal males going down to ~100 Hz with some as low as the 60s, THX's 80 Hz is preferred, 120 Hz max based on my experience using a DIY ~100 Hz line level XO.
Floor loaded front loaded compression horns (FLH) are pretty rare with the only one I can think of ATM is the late Bruce Edgar's 'Monolith'.
Anything with an air mass has a terminus/mouth end correction since a portion of this sound 'bubble' extends beyond the physical exit, so for wall, floor loading it's normally best to be inside this mass loading gap/'window' Here are the most used end corrections for typical vented boxes.
A horn is fundamentally the same, just have to factor in its flare frequency, factor expansion, so a larger than normal gap than a simple pipe or even a down firing (sub) woofer unless you do as they did by adding a box termination to the flare and unless there's proof that it is otherwise a flared horn, then it may be constricted/closed off a bit to further mass load it. 'Been there, done that' and done right it can make a very powerful low end, though it usually requires it to be very heavy if not physically attached to the floor and will have less usable HF BW. From just looking at a picture and listing a 250 Hz, 109 dB eff. implies it doesn't go low with any 'authority', so likely 'just' a mid bass horn.
Anyway, (sub) bass horn design is no different than for any other bandwidth (BW), so what BW do you want with the understanding that unless heavily truncated it will likely be much larger than the Anima's.
I must have worded myself wrong. When I write it goes through google translate🙂. What I have in mind is not a horn it is a conventional cabinet. The bass just sits at the bottom of the cabinet and faces downwards towards the floor. The cabinet is then raised slightly from the floor so that the sound can come out. I would like to know if it gives a worse bass than if the driver had sat normally on the baffle and faced forward. It is only for the deepest as a supplement to a 2-way. It is for purely design reasons that I have thought of doing it that way.
Without knowing it, I would immediately think that the bass is amplified more than if the driver just sat on the baffle, but is it a "quality sound" that comes. And it will be cut low maybe 100 Hz or lower just with a coil.
Without knowing it, I would immediately think that the bass is amplified more than if the driver just sat on the baffle, but is it a "quality sound" that comes. And it will be cut low maybe 100 Hz or lower just with a coil.
I've only experimented at line level 120 Hz XO in a high SQ, high efficiency vintage Altec based full compression horn system, which was fine assuming a non resonant floor.
Having a read through your posts, I think you need to have a look through the sub woofer forum, especially "tapped horns" good luck