Having two power supplies to power two ncx500 modules or two Purifi modules is the best way to go. Amps with one power supply powering two amplifier modules have “cut corners” to bring the cost down and to be compact.
I suppose Hypex could cut someone off. But I think being proactive is better than reactive.
It’s fine with the NC500. Because they’re lower current modules. Not the NCx500.
Do you mean the NC500MP or NC502MP?
Yes you need to build an amp in a manner that all the protection circuitry actually works as intended. It’s impossible for the overcurrent circuitry to work as intended with 2 NCx500’s paired with 1 SMPS1200A700.
My mistake I was thinking 2x NC400 with 1 SMPS1200A400.
Got it
Yeah with the pool of manufacturers making builds with these parts it’s no surprise. Hence the reason Hypex should implement a certification program.
Have you done much high-power bench testing?
Yes that is ok. But still for “the best way to do it” setup, I would recommend dual mono. No matter which class D module is in the setup.
The specific DUT was already suspicious right from the beginning with its long settling time (32 min.! ) as pointed by other members too.
On which test did it break?
Yet for Hypex this set Up is safe enough...
Where did you read that Hypex said their 1200w supply is adequate to allow both of these modules to output their full rated power? Do you think Hypex puts current limiters in the amp modules for no reason? How is it possible to utilize this protection if the supply blows up before it can be triggered?
I cannot agree on the 160w, no need to be so conservative. Peaks and headroom also matter, and 85v on the rails is not the same as 35-40v.
Have you read the datasheet?
The problem is the current. Not the voltage. If 85V is the only number to look at, why not run 50 modules off a single supply? 100? 1000?
Once again, this is assumed by the designers. From the datasheet:
