View Parts Express Copperhead - PS95 spec-sheet profiles, a 1-way loudspeaker design by @James on LoudspeakerLab.
Preference rating 1.5 · F3 123 Hz · Max SPL 90 dB at 1 kHz · Min impedance 8.3 Ω · Sensitivity 79.4 dB · Estimated cost USD 44
Baffle 127 × 203 mm