SB Acoustics SB15NRX2C30-4 standard measurements on LoudspeakerLab. 89.5 dB sensitivity. Fs 34 Hz. Qts 0.280. Evidence grade C+ (57.0/100).
Fs: 34 Hz; Qts: 0.280; Qes: 0.300; Qms: 3.580; Vas: 20.50 L; Sd: 82.0 cm²; Re: 3.10 Ω; Le: 0.12 mH; Sensitivity: 89.5 dB; Nominal Z: 4.0 Ω; Measured range: 21-19265 Hz
On-axis flatness 49 · DI tracking 0 · DI smoothness 0
Scored passband 145 Hz–13.9 kHz
Spec-sheet profiles · Off-axis H/V response data available.
Vented ~8.4 L · Fb 54 Hz
LoudspeakerLab evidence grade: C+ (57.0/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.