What we know about the measurement:
Part Express DIY Copperhead is a passive bookshelves that cost around 100 USD for a pair.
- Quality of the measurement data is high.
- Origin of the data is ErinsAudioCorner.
- Format of the data is generated by a Klippel NFS .
- Sensitivity: 76.6dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
- -3dB (resp. -6db) point v.s. reference is at 98.1Hz (resp. 82.0Hz).
- Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
- Frequency deviation is 4.4dB over the same frequency range.
- Directivity
- Horizontal directivity is (-60.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
- Vertical directivity is (-60.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
- Tonality (Preference) Score
- Tonality (Preference) Score is 2.13
and would be 5.38 with a
perfect subwoofer.
- Details: NBD: ON 0.636, LW 0.589, SP 0.589, PIR 0.579; SM: SP0.74, PIR0.436; LFQ 0.533, LFX 82Hz
- Tonality (Preference) Score is 4.04
with an EQ and would be 7.11 with a
perfect subwoofer and the same EQ.
- Details: NBD: ON 0.468, LW 0.417, SP 0.486, PIR 0.416; SM: SP0.861, PIR0.793; LFQ 0.533, LFX 74Hz
- Tonality (Preference) Score is 2.13
and would be 5.38 with a
perfect subwoofer.
- Link to Original review.