View $$$, a 2-way loudspeaker design by @Tailwind on LoudspeakerLab.
Preference rating 6.2 · F3 35 Hz · Max SPL 108 dB at 1 kHz · Min impedance 4.4 Ω · Sensitivity 83.9 dB · Estimated cost USD 572
Baffle 203 × 863 mm