Scan-Speak 18WU/4747T00 standard measurements on LoudspeakerLab. 87.5 dB sensitivity. Fs 36 Hz. Qts 0.350. Evidence grade C+ (57.0/100).
Fs: 36 Hz; Qts: 0.350; Qes: 0.390; Qms: 3.720; Vas: 36.00 L; Sd: 154.0 cm²; Re: 3.30 Ω; Le: 0.40 mH; Sensitivity: 87.5 dB; Nominal Z: 4.0 Ω; Measured range: 21-17865 Hz
On-axis flatness 68 · DI tracking 13 · DI smoothness 29
Scored passband 60 Hz–3.5 kHz
Spec-sheet profiles · Off-axis H/V response data available.
Vented ~22.2 L · Fb 45 Hz
LoudspeakerLab evidence grade: C+ (57.0/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.