Romy the Cat wrote:

In horn everything is like a programming in 4GL language – whatever you do – works. The key is to make it to do exactly what is necessary.

haralanov wrote:

Moreart,….quote taken from your website): "By processing certain overtones selectively, a rich bass effect can be created using the small speakers which cannot produce lower frequency components below 100 Hz. While speakers produce tones above 100 Hz, the processed bass overtones compel the brain to replace the missing fundamental bass signals, creating the illusion of bass."

moreart wrote:

your quote you find at: http://en.wikipedia.org/wiki/Missing_fundamental Romy, what a laugh, are you a comedian? Where is your similar construction list? show us one!

Moreart,

Have you heard about the doctors who were on secretive payroll of tobacco companies who for year stated that smoking is not dangers?  What you linked is the exactly crap that audio “electricians” invented to justify the marketing claims.  No one object that there are conditions under which it is possible to extrapolate lower frequency from overtones but does it mean the we need make loudspeakers aiming this. For God sake, man, who give a shit what kind award-winning Christina Aguilera was recorded and how much bass is allegingly perceived in her recordings? El`Ol, was right – there are much better audio communities who would entertain this idea and combine it with their vision of the Easy Audio. One more think, and I am not kidding, – never use “we” or “us” when you express your own thoughts. It annoys me.

moreart wrote:

Hello, i made a new construction down to ~34 Hz for 3", 5", 6,5" and 8" bass driver, 15 cm flat behind the flat screen or two with 100x120x15 cm, or sideboard for sat placement. the 17 inside width would be a best solution with the TB W6-1916. the 23 cm inside width would be enough for 100 dB 1W1m up to 200 Hz with superb sytem impedance, by using a 8N MB420 16 Ohm 18sound you can couple two double horns (4Ohm) with one Submodul. opinions?

moreart wrote:

Hello, i can´t help it, take a calculator and calculate, read the links and see the measurements and simulation of the Kornett to interpret, if you don´t understand, ask, if this doesn´t help, don´t write than your knowledge is to small. Show us you construction experience of horns.

• to be effective at bass frequencies, a BLH needs to be as long as a FLH would be; I've yet to see a BLH, with the possible exception of the Tannoy Westminster, that actually has a long enough horn path for supporting bass frequencies down into the real low bass.
  
  
• the horn mouth needs to be the correct size for bass frequencies; few, if any, are.
  
  
• sound needs a finite time along the BLH. It then mixes with the direct sound from the driver. The sound from the BLH will always be out of phase with the directly-radiated sound. At certain frequencies, it will be 360° out of phase, or multiples thereof, and will reinforce the directly-radiated sound. At other frequencies, it will be 180° out of phase, or 540° etc, and lead to a cancellation. At most frequencies, it will be somewhere in between. At all frequencies, it will lead to time smear. It's debatable how much that matters at low frequencies, but it'd be better to avoid this time smear.
  
  
• most BLHs fire the bass towards the back wall, and almost all at a different height from the direct radiator, which results in a very different way of loading the room.
  
  
• all existing BLHs are folded. There's a very good argument to be made that the different sections of the BLH actually act as resonators at specific frequencies; if you look a the frequency response of real-word BLHs, they all show a series of peaks and valleys.
  
  
• another way of looking at BLHs is to see them as transmission lines; they would probably be more effective if built to the rules of transmisson lines.
  
  
• transmission lines are really only needlessly complicated bass reflex alignments. Instead of a BLH, you'd probably get better results from a properly sorted BR alignment.