Scan-Speak 28W/4878T00 standard measurements on LoudspeakerLab. 88.0 dB sensitivity. Fs 18 Hz. Qts 0.300. Evidence grade C+ (57.0/100).
Fs: 18 Hz; Qts: 0.300; Qes: 0.320; Qms: 5.600; Vas: 127.00 L; Sd: 363.0 cm²; Re: 3.10 Ω; Le: 0.50 mH; Sensitivity: 88.0 dB; Nominal Z: 4.0 Ω; Measured range: 21-20000 Hz
On-axis flatness 51 · DI tracking 62 · DI smoothness 41
Scored passband 28 Hz–1.5 kHz
Spec-sheet profiles · Off-axis H/V response data available.
Vented ~59.3 L · Fb 26 Hz
LoudspeakerLab evidence grade: C+ (57.0/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.