I think you should be more careful in amp selection. I see from specs of the Ethos the following:
Sensitivity
92 dB/2.83 volts/meter
Impedance
Nominal: 4 ohms, 0.8 ohms @ 20 kHz Crossover Frequency
375 Hz
0.8 ohm !! Argh that is low. And 90 ish dB is ok not bad for sensitivity.
You will need an amp that is made to be stable for low impedance. Going below 2 ohm is not a good start.
Sensitivity
92 dB/2.83 volts/meter
Impedance
Nominal: 4 ohms, 0.8 ohms @ 20 kHz Crossover Frequency
375 Hz
0.8 ohm !! Argh that is low. And 90 ish dB is ok not bad for sensitivity.
You will need an amp that is made to be stable for low impedance. Going below 2 ohm is not a good start.