Re: Wow! Very interesting!


The volume of the rear chamber should change if another compression ratio is used. In fact this volume varies lineair with this ratio.

For some horns it really makes a difference if the volume is chosen wrong. Might cause 5-6dB bumps! Use McBean to model a rearloaded hyberbolic horn with:

l=2.8m
ah=75cm2
am=850cm2

In this case the volume should be kept as small as possible!

Best regards,

Walt


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