Measurements for speaker Quad Electroacoustics ESL-57

Quad Electroacoustics ESL-57 is a passive panel speaker .

Quality of the measurement data is low .
Origin of the data is Princeton .
Format of the data is .
Sensitivity: 92.8dB (avg. 100Hz-1kHz for 2.83V measured at 1m)
Reference level is normalised to 0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
Frequency deviation is 5.9dB over the same frequency range.
Directivity
- Horizontal directivity is (-10.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
- Vertical directivity is (-10.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
Tonality (Preference) Score
- Tonality (Preference) Score is -2.9 and would be 3.8 with a perfect subwoofer.
  - Details: NBD: ON 0.87, LW 0.77, SP 0.69, PIR 0.65; SM: SP0.13, PIR0.1; LFQ 10, LFX 509Hz
- Tonality (Preference) Score is -0.1 with an EQ and would be 6.5 with a perfect subwoofer and the same EQ.
  - Details: NBD: ON 0.7, LW 0.52, SP 0.47, PIR 0.39; SM: SP0.7, PIR0.76; LFQ 10, LFX 509Hz
Link to Original review.