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#432412 - 06/02/19 01:29 AM Re: ADA-1500: A BEAST of an amp! [Re: Mojo]
Mojo Offline
axiomite

Registered: 01/21/07
Posts: 5756
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.
_________________________
M100,VP160,QS10HPx2,EP800,M5HP,M3,M50 v4
M80,VP150,QS8x4,EP600 v2
ADA-1000-2,3,1500-3
Air N2

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#432454 - 06/04/19 01:00 PM Re: ADA-1500: A BEAST of an amp! [Re: Mojo]
Mojo Offline
axiomite

Registered: 01/21/07
Posts: 5756
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.
_________________________
M100,VP160,QS10HPx2,EP800,M5HP,M3,M50 v4
M80,VP150,QS8x4,EP600 v2
ADA-1000-2,3,1500-3
Air N2

Top
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