Is there a simple way to explain
on axis
off axis
CD (is that the same as constant dispersion?)
impulse measurement
etc
etc
etc
What great links have you found that are easily understood?
on axis
off axis
CD (is that the same as constant dispersion?)
impulse measurement
etc
etc
etc
What great links have you found that are easily understood?
200hz, or even lower maybe 150hz at a push. Looking at anything from 6" to 15" driver, still have a blank sheet of paper.🙂
Totally forget using a 130Hz tractrix from 150Hz. Even 200Hz is actually below optimal with this conearea. It will not help pushing it 😉. Why not build a 100Hz instead😎?
The only way to go lower is to remodel to a "hornreflex". With a 150Hz below 100Hz will be no problem. But then senstivity and low bandwidth are the the eventual problems. Only OK for midbass, so this is nothing for you.
Would be great to have a 150Hz-5kHz horn.
The only way to go lower is to remodel to a "hornreflex". With a 150Hz below 100Hz will be no problem. But then senstivity and low bandwidth are the the eventual problems. Only OK for midbass, so this is nothing for you.
Would be great to have a 150Hz-5kHz horn.
Sheets of MDF are a max 1200 wide so I will set myself a limit of 1200 max at the mouth. 113cm long and 110cm wide seems to be the quick calcs on a 100hz tractrix horn with 80cm2 opening. Seems doable. Now I need to find a driver🙂
With a horn that big you're going to have to think carefully about where the mid-treble horn is going to sit, if it's time-aligned . It's going to be a long way up.
This is one of the reasons people compromise with exponential/hyperbolic horns for the upper bass .
MJ
This is one of the reasons people compromise with exponential/hyperbolic horns for the upper bass .
MJ
Yes, I have done a few sketches and when the horn gets over a metre long, with a width of 120cm it creates other difficulties.
Maybe I will go back to a 100cm tractrix.
Maybe I will go back to a 100cm tractrix.
I am not sure, but I will try and design everything first to avoide digital help, hoping to build using passive x-over and hoping to avoid digital time delay and eq. I may well dabble in it after the build thou!
GOTO bass horn
Andrew!
Could you please give me some building information about your GOTO bass horn?
Greets:
Tyimo
Andrew!
Could you please give me some building information about your GOTO bass horn?
Greets:
Tyimo
Actually you can cut the horn on the side against the floor. It must be done parallell to the horn centerline. The horn will mirror and can be cut at least at one quarter of its height and more. There will be no lowend loss. In the picture is a midhorn that mirrors against the wall.
An externally hosted image should be here but it was not working when we last tested it.
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How about the B&C 8PE21, used below 600Hz (4" throat). Is it worth the extra compared with the Delta Pro 8? (despite that it might be better on a slightly shorter horn)
They are so close to each other you would have to be very specific why you would use one over the other. For example, if you need 16 ohms, then the Delta Pro 8B would be the natural choice. B&C does not make the 8PE21 in 16 ohms anymore. I got the last 4 that they made in 16 ohms.
I doutb anyone could tell much difference if you set them up side by side using an ABX test box. About the only thing I ever noticed after many hours of hearing both is the Delta Pro has a bit more detail in the upper mids, and the B&C reaches higher in frequency, but does so with a very seductive smoothness. Pick you poison. They are virtually identical in the bass.
Rgs, JLH
JLH
Just got my first rectangular tractrix horn experiment working, driver B&C 8PE21 at the moment . Thread :
audio-talk :: View topic - Something stirs in the Undergrowth
Don't know if you fancy commenting either here or on our UK forum there ?
It isn't sounding too good yet, but there are a number of loose ends currently ( eg. back-chamber ) . Would welcome your experienced input .
Mark
Just got my first rectangular tractrix horn experiment working, driver B&C 8PE21 at the moment . Thread :
audio-talk :: View topic - Something stirs in the Undergrowth
Don't know if you fancy commenting either here or on our UK forum there ?
It isn't sounding too good yet, but there are a number of loose ends currently ( eg. back-chamber ) . Would welcome your experienced input .
Mark
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