SB Acoustics SB15MFC30-4 standard measurements on LoudspeakerLab. 90.0 dB sensitivity. Fs 36 Hz. Qts 0.280. Evidence grade C+ (57.0/100).
Fs: 36 Hz; Qts: 0.280; Qes: 0.300; Qms: 5.260; Vas: 19.40 L; Sd: 82.0 cm²; Re: 3.10 Ω; Le: 0.12 mH; Sensitivity: 90.0 dB; Nominal Z: 4.0 Ω; Measured range: 22-19082 Hz
On-axis flatness 50 · DI tracking 63 · DI smoothness 47
Scored passband 58 Hz–5.2 kHz
Spec-sheet profiles · Off-axis H/V response data available.
Vented ~8.0 L · Fb 55 Hz
LoudspeakerLab evidence grade: C+ (57.0/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.