Posted by Wayne Parham [ 70.234.99.36 ] on February 23, 2009 at 14:13:23:

In Reply to: Re: Can you guess horn cut-off by dimension only? posted by Chris R on February 23, 2009 at 13:30:06:

1/3λ is a fairly safe cutoff frequency estimate. 1/4λ would be a drop dead value, one that I would not expect any acoustic loading below. 1/2λ is where efficiency gains are seen, with the highest efficiency range above that frequency. Between 1/4λ and 1/2λ, there are usually some ripples in response, sometimes mitigated by other horn features like flare profile and rear chamber size.

Replies: