Axiom Home Page Forums General Discussion Stereo ADA-1500: A BEAST of an amp!

A single M5 hits a valley of 6 Ohms at the low frequencies where I witness the 1500 and 1000 shutting down. Two in parallel go down to 3 Ohms at those low frequencies and 2 Ohms in the lower mid-range. That's well below the ADA 4 Ohm spec.

The saving grace for the ADA is that at low frequencies, the M5 load is almost purely resistive. That's not the case in the lower mid-range but there's less energy in that band compared to the lows so no shut-downs there.

Agreed that shunting boosts the current to a point. Then the voltage collapses and that's the end of that.

The ADAs are well-designed from what I can see.

I really love the protection on these ADA amps. Before they can distort or worse (ignite or pop a component), the channel in distress gracefully temporarily shuts down. When I say temporarily, I mean transiently. It's not like it turns off and takes minutes or even seconds to come back again. Sometimes the protection is silent, and sometimes I can hear a slight pop. I suppose there's a turn-off transient somewhere that arises in the circuit. That's not a big deal; it's just an observation.