What we know about the measurement:
Dayton Audio OPAL1 is a passive bookshelves that cost around 800 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: 74.7dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
- -3dB (resp. -6db) point v.s. reference is at 52.7Hz (resp. 38.8Hz).
- Reference level is normalised to -0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
- Frequency deviation is 4.2dB over the same frequency range.
- Directivity
- Horizontal directivity is (-50.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
- Vertical directivity is (-30.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
- Tonality (Preference) Score
- Tonality (Preference) Score is 5.03
and would be 6.53 with a
perfect subwoofer.
- Details: NBD: ON 0.529, LW 0.456, SP 0.4, PIR 0.402; SM: SP0.812, PIR0.59; LFQ 0.504, LFX 32Hz
- Tonality (Preference) Score is 6.84
with an EQ and would be 8.16 with a
perfect subwoofer and the same EQ.
- Details: NBD: ON 0.372, LW 0.301, SP 0.321, PIR 0.271; SM: SP0.947, PIR0.956; LFQ 0.504, LFX 29Hz
- Tonality (Preference) Score is 5.03
and would be 6.53 with a
perfect subwoofer.
- Link to original Review: eac review. Links to other reviews: yt review .
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Vendor specifications:
- Sensitivity 78.5 dB
- Impedance 4.3 Ohm
- SPL
- peak: 102 dB
- Size
- Width 178mm
- Height 356mm
- Depth 241mm
- Weight 9.4kg