Beyma 12WRS400 (8 Ohm) standard measurements on LoudspeakerLab. 95.8 dB sensitivity. Fs 42 Hz. Qts 0.290. Evidence grade C (47.0/100).
Fs: 42 Hz; Qts: 0.290; Qes: 0.310; Qms: 7.700; Vas: 91.00 L; Sd: 530.0 cm²; Re: 5.60 Ω; Le: 1.30 mH; Sensitivity: 95.8 dB; Nominal Z: 7.0 Ω; Measured range: 20-19419 Hz
On-axis flatness 50
Scored passband 69 Hz–3.5 kHz
Spec-sheet profiles
Vented ~39.8 L · Fb 63 Hz
LoudspeakerLab evidence grade: C (47.0/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.