Bliesma T25B

9/26/2020 initial post

11/28/2020 added 6" waveguide

6/20/2021 updated design with new tweeter interface, does not impact performance

9/1/2021 added 6.5" vA 68

6/12/2022 added routing templates and updated waveguides for use with these templates

9/25/2022 added 6" 1:.68 aspect ratio waveguide

12/27/2023 added 4" waveguide

note: the spike near 48khz in the plots below is probably an artifact of the sound card cutoff doing wonky things with the FFT math

4" waveguide

5" waveguides

note: 5" 68 vA is an elliptical mouth with an aspect ratio of 1:.68

6" waveguide:

6" waveguide (higher aspect ratio mouth):

6.5" waveguides

note: 6.5" 68 vA is an elliptical mouth with an aspect ratio of 1:.68