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In Reply to: RE: Ping Kloss posted by Mr_Steady on November 17, 2014 at 16:39:49
I guess I should've explained myself better. On the picture, those 2-3 inches of the ground recommendation would applied to the straight 80 Hz Edgarhorn. Try putting a 2x4 underneath and then listen.
Follow Ups:
So you mean 4" off the ground?
Sorry, I don't spend a lot of time thinking about deep bass. At what frequency does sound go mono? Thanks.
Big speakers and little amps blew my mind!
Well, 2x4 when put flat on the ground will allow you to raise the speaker 2" off the ground.
I just received an email requesting that I post my website address. Here it is:
www.inlowsound.com
Hi John,The link to the your site was already on the thread.
What crossover points have you played with on this sub. LOL, it's really a woofer isn't it?
I wonder if you could get away with using one and crossing it at 150hz, and then taking up with the mid/bass horns.
Jamie
Big speakers and little amps blew my mind!
Edits: 11/19/14
I saw that link to my website on one of your posts, Jamie. I added the extra link for the fellow who emailed me (he/she probably didn't see your post).
I've run the Lab 12 prototype version up to 180 hz, but prefer it at 135 hz or lower. Lab 12s get a little murky above 150 hz. The commercial horn (using the Radian 2216 Neo 15) is capable of extended range (the sims predict 400 hz), and from what I hear in the fabrication shop, I have no doubt it would be happy at 200 hz. The primary problem with higher crossover points are time anomalies. The shorter the wavelength (higher crossover point), the more obvious the mismatch in distance from the bass/mid bass drivers.
Well I'm sorry this thread hasn't gotten the kind of action is deserves. It is a possibility that this is one bass horn too far. I thought I was a horn nut, but you got me beat. I would have a hard time to put one or two of these in my living room. I once read an article in a 1950s Radio-Electronics magazine entitled, "What Price 20HZ?" It was the first thing I thought of when I saw this horn.
I would like to bring up the 60hz Hyperbolic Crescent Horn.
This is much more my style. Big but not too big. Down to 60hz, hard to ask for better than that. Goes up to 400 and 500hz depending on the driver. Wow! That's three full octaves. I don't know of any other front loaded bass horns that achieve three octaves. With a B&C 10MD26 it can go to 500hz at 110db. That's the efficiency level I like to be at. The 500hz high pass allows you to do two-way. That's awesome with a horn this size and with these capabilities. Two way is a long stretch with a folded W and it only goes down to 100hz. This even beats your mid/bass horns. It's just a matter of what the hyperbolic profile does to the sound. It looks like it gets distorted when you get to 115db to 125db levels, but at 110 it looks very good. I don't intend to go that high. I wonder what a hypex profile would look like with this horn.
In short. I think these are like the ultimate J horns. I bet they beat J horns in every way.
Keep up the killer work John,
Jamie
Big speakers and little amps blew my mind!
Jamie, your avid interest in my horn designs kinda makes my day. It's not often that I see someone who craves a horn's response the way I do.
The spiral bass horn is pretty exotic, and as mentioned on my website, a bit much for most audiophiles. Still, it was enjoyable to share my adventure.
I haven't fabricated the 60 hz crescent horn, but I've never been let down by Hornresp. If it says the horn will perform, then I'm certain it will.
I notice you've posted several times, recently. I've been too busy to reply. Sorry about that.
Hey Jamie,
What would be great is if you'd share your progress with this project. I'd love to see how you overcome the various challenges. I'd especially like to read your impressions of this horn upon completion.
To bad we're not neighbors! :)
"To bad we're not neighbors! :)"
LOL. I'm sure I could tote things for you, and fetch boards that are at the bottom of the lumber pile. :) I bet your neighbors can hear your stereo at night. "Are the Inlows having another party?" I live in the country, so no such worries. ;)
"What would be great is if you'd share your progress with this project. I'd love to see how you overcome the various challenges. I'd especially like to read your impressions of this horn upon completion."
Let's see. Nothing has been decided about the driver enclosure, and whether anullment is going to be used. See how quick it took to get in deep water. Too deep for me.
I'm more of a flat-pack kind of guy. With predrilled pilot holes please. You should maybe look into some kind of hybrid flat pack. Have the big stuff cut local, but you provide the smaller complicated bits. Just throwing that out there.
If you are willing to answer a couple of questions about the low pass of a mid/bass horn, then I would be happy to give you some free unsolicited advise on your Paper Tractrix horns.
To wit; Which do you prefer? Running a lowpass filter on a M/B horn, or running it's driver to it's resonant frequecny, or neither, and why?
Regards,
Jamie
Big speakers and little amps blew my mind!
" You should maybe look into some kind of hybrid flat pack. Have the big stuff cut local, but you provide the smaller complicated bits. Just throwing that out there."
Count me in! I'll take one of those kits.
No problem.
One other reason I like the Crescent horn; It means you can get horn super efficiency without needing a $10K bass compression driver. Thanks John! I owe you one.
Jamie
Big speakers and little amps blew my mind!
"The primary problem with higher crossover points are time anomalies. The shorter the wavelength (higher crossover point), the more obvious the mismatch in distance from the bass/mid bass drivers."
Oh you betcha. I've never dealt with a misalignment greater that three and a half feet. I couldn't find how long the SSB horn is rolled out. I couldn't make it out on the schematic.
I guess 80hz to 200hz is the grey area, and anybody who chooses a number anywhere in between could have that number jammed side-ways up his butt by somebody. Just a thought.
Jamie
Big speakers and little amps blew my mind!
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