KEF Reference 4C Meta is
a passive
center
that cost around 8000 USD

Quality of the measurement data is
medium.

Origin of the data is KEF.

Format of the data is
.

Sensitivity: 88.7dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)

-3dB (resp. -6db) point v.s. reference is at 46.5Hz (resp. 32.9Hz).

Reference level is normalised to 0.6dB
computed over the frequency range [300.0Hz,
5000.0Hz].

Frequency deviation is 1.7dB over the same frequency range.

Tonality (Preference) Score

Tonality (Preference) Score is 6.63
and would be 8.09 with a
perfect subwoofer.

Details:
NBD: ON 0.371,
LW 0.256, SP
0.32, PIR
0.282; SM:
SP0.973,
PIR0.94; LFQ
0.936, LFX 31Hz

Tonality (Preference) Score is 7.24
with an EQ and would be 8.57 with a
perfect subwoofer and the same EQ.

Details:
NBD: ON 0.283,
LW 0.194, SP
0.246, PIR
0.191; SM:
SP0.972,
PIR0.933; LFQ 0.936, LFX 29Hz

Note: Data computed by KEF is precise above 300Hz, the on axis is corrected below that. The other curves are interpolated below 300Hz and are not very precise..