I'd say that the compression chamber is a tad too large. It seems to be around 30litres, when 20 litres yields a slightly lower frequency response, slightly lower efficiency, but a fair bit more power handeling... 
I'll tell ya what man... thats the LAST time I hijack one of YOUR threads....
*goes off to sit in his horn*
*goes off to sit in his horn*
Here's my take on bass horns.
If you're gonna go, go all out!
Yes a 30hz basshorn is very big, but I like the extension. I know there's not that much musical content down that low, but it still makes a big difference. IMHO
If you're gonna go, go all out!
Yes a 30hz basshorn is very big, but I like the extension. I know there's not that much musical content down that low, but it still makes a big difference. IMHO
im very satisfied with my one as it is! i only have a small room for it, and it's heaps loud n low! i do plan later on to make horns for HT use when i move out, but that wont be for a while 😛
Well, right now I'm working on some transmission lines for my extremises. They were my first transmission lines, and I am intrigued by how suprisingly good they sound, and low they get for a 46hz TL(I'd say usable response down to 30hz)
I'd almost like a TL for my Tumult too, but horn efficiency sounds alot nicer🙂 So maybe when I'm done with those mains I will work on a 30hz monster horn for the TUMULT! I was going to model one up the other night in hornresp but some file or other got messed up and it looks like I'll have to reload the program..... If someone is bored enough to make a design for me, I'd be happy to consider building it! But remember I want a hornmouth/flare/hornlength large enough to accomadate 30hz and I mean halfspace!
I'd almost like a TL for my Tumult too, but horn efficiency sounds alot nicer🙂 So maybe when I'm done with those mains I will work on a 30hz monster horn for the TUMULT! I was going to model one up the other night in hornresp but some file or other got messed up and it looks like I'll have to reload the program..... If someone is bored enough to make a design for me, I'd be happy to consider building it! But remember I want a hornmouth/flare/hornlength large enough to accomadate 30hz and I mean halfspace!
you're looking at a horn somewhere around the size of a single bed... and a meter wide....
edit: which won't fit through a door 😛
edit: which won't fit through a door 😛
I'm sure it can be folded to fit through a door..... and if it cant. it can be sectioned to fit through a door, and if that is too much work, well I have a two level 24'x24' workshop and there's alot of unoccupied space.... pleany for a HUGE horn.... probably one as big as the 6090monster, or bigger
BassAwdyO said:
in that case.... design, and fold it yourself.... Mike's going rate is $35 an hour.... 😀 expect about 4 hours work for a properly designed horn... 😉
And you wonder why I havent built one yet.....
$140 for a design psh.... Even if I had no clue how to design a horn I wouldnt pay that much for it. I wouldnt even pay that for materials! $100max for 4 sheets of MDF and pleanty of screws and liquid nails.
And 4 hours for a design? Sounds like 3 hours of scractching ballsack, 4 minutes of browsing for driver specs, 14 minutes to download HornRESP. 10 minutes for an initial design, and 22 minutes of tinkering to get good flat response, and 10 minutes to design a complete folded model
$140 for a design psh.... Even if I had no clue how to design a horn I wouldnt pay that much for it. I wouldnt even pay that for materials! $100max for 4 sheets of MDF and pleanty of screws and liquid nails.
And 4 hours for a design? Sounds like 3 hours of scractching ballsack, 4 minutes of browsing for driver specs, 14 minutes to download HornRESP. 10 minutes for an initial design, and 22 minutes of tinkering to get good flat response, and 10 minutes to design a complete folded model
Make a modular design. Perhaps even a labhorn sized unit with a flare extension consisting of 1.2m sections (half ply sheets)
The design work includes all the effort required in study
eg: knowing that putting a short large expansion conical section in the middle of the horn can do interesting stuff
knowing that the compression ratio suggested by leach math may infact be too high realistically
Knowing that the driver required for the lowest Fc should require a low compression ratio horn
A large Vtc is handy too
Knowing that 3-4 straight sections approximating the exponential flare works just like a curved profile at the bass frequencies.
etc etc etc, etc/.
Am looking forward to seeing your 6090 monster
From memory the Tumult worked optimally on a higher compression ratio unit.
BassAwdyO said:
10 minutes? you definatly haven't tried it... try in excess of 2 hours easily...
just a bit of an update too on stuff, i have given up my panasonic amp and have gone with using a pioneer A-109 40 watt x2 integrated amp with an 80 watt sub amp 😀 i am very happy now with my setup and i am now satisfied with how low it can go and you can feel the bass too. the 80 watt sub amp will do for now, and i am having a party as my 21st is coming up in june, ill take some pics of that. next next project im working on is fixing up 3 JBL SAT 125's that i bought off ebay that are faulty. they arnt blown but there is an open circuit on all 3 of the speakers, which i cant really fix myself, i cheked out prices and it's cheaper to replace the woofers than to get them fixed. cost $41 AUD to get replacements from JBL and costs about $80 or so if i wanted to get them fixed! lol!! im setting up a small theater setup in my room, so ill be set until i move out 😀
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