@thieliste, I’ll hazard a guess that the 16’s 100 Watts Class A output halves with each halving of impedance (assuming it can hold up below 4 Ohms) below 8 Ohms. And that happens as the CS 3.7’s sensitivity is dropping as proportionately with impedance. Interesting that the 40 though not quite a double down monster still has a respectable 2 Ohms rating, but the 16 does not.
CODA 16.0 Stereo Amplifier - Destination HiFi
Coda 40.0 Stereo Amplifier - Destination HiFi
CODA 16.0 Stereo Amplifier - Destination HiFi
Coda 40.0 Stereo Amplifier - Destination HiFi