Sophia 2
Sensitivity: 89 dB
Nominal Impedance: 4 ohms (3 ohms minimum)
Minimum Amplifier Power: 12 WATTS per channel
Sophia 3
Sensitivity: 87 dB
Nominal Impedance: 4 ohms / 3.1 ohms minimum
Minimum Amplifier Power: 25 WATTS per channel
Pass Labs Int30A
30 watts into 8 ohms
60 watts into 4 ohms
Which means:
57 watts produces 97dB with Sophia 2 @ 3M/10Feet
57 watts produces 95dB with Sophia 3 @ 3M/10Feet
If you listened to music between 75-85dB it would only need 1-9 watts!
Calculations using
https://www.crownaudio.com/en-US/too...power_required