View Parts Express Copperhead - in-cabinet measures, a 1-way loudspeaker design by @James on LoudspeakerLab.
Preference rating 1.8 · F3 92 Hz · Max SPL 88 dB at 1 kHz · Min impedance 7.6 Ω · Sensitivity 76.4 dB · Estimated cost USD 44
Baffle 127 × 203 mm