Hi everybody, i am currently working on a Jubilee style project: 2 horn crossed at 500Hz. After extensive research to find the good driver, I went to an Audax PR300M0 (Fs 17Hz, Qts 0.26) and started simulations on Hornresp. You will find below two simulations of front horn loaded, closed chamber.
One has a hyperbolic expansion, the other one is more atypical with a narrowing after first expansion. This intrigues me with its unconventional shape while it offers a much wider and smoother response curve in the low frequencies with a small loss of sensitivity (driver, chamber volume, surface Sd, horn length are identical for the 2 simulations).
I turn to you for advices: should I trust the Hornresp simulation? Should I focus on this narrowed expansion which seems to provide a 1 Pi response from 40Hz to 500Hz with a single 12' driver?
Thank you in advance for your advice and all my apologies for my poor English langage.
One has a hyperbolic expansion, the other one is more atypical with a narrowing after first expansion. This intrigues me with its unconventional shape while it offers a much wider and smoother response curve in the low frequencies with a small loss of sensitivity (driver, chamber volume, surface Sd, horn length are identical for the 2 simulations).
I turn to you for advices: should I trust the Hornresp simulation? Should I focus on this narrowed expansion which seems to provide a 1 Pi response from 40Hz to 500Hz with a single 12' driver?
Thank you in advance for your advice and all my apologies for my poor English langage.
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The second version seems to just reduce the gain at higher frequencies, which flattens the response.
How do you plan to implement such an expansion in an actual build? That's usually the challenge. Which is why I usually start with the desired box size and physical layout and work my way back to the Hornresp sim, rather than vice-versa. My BOXPLAN Excel workbooks make the design work easier 🙂.
How do you plan to implement such an expansion in an actual build? That's usually the challenge. Which is why I usually start with the desired box size and physical layout and work my way back to the Hornresp sim, rather than vice-versa. My BOXPLAN Excel workbooks make the design work easier 🙂.
The Hornresp simulation will be accurate if you can build it as Brian says. If the mouth is large enough that you see some directivity then the onaxis SPL may differ from the power response that hornresp is simulating (IE high frequencies may be elevated on axis compared to the sim).