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How do you know that?I still don't see how lowering the voltage would increase the current driving capacity. Have you actually done a SOA analysis on the nc400?Any effects on sonics is of course speculation until verified.
Ohm's law doesn't suddenly change at some magic impedance value. The lower the impedance, the more current and less voltage are required to reach a specific power value, but what the nc400 controls is the voltage, not the current. The current is a result of the voltage, and lowering the supply voltage does not increase the current capability of the amp."Current-dumping" and current-control amplifier designs are another matter, but as far as I know, the nc400 isn't one of them.22 A, something the nc400 can drive into 1 ohm by outputting a 22 V - independent of the supply voltage. You still need 22 V on the output to cause 22 A in a 1 ohm load, and it doesn't matter if the supply voltage is 30 V or 299.5 V. No. If you know your load impedance is low, you *can* lower your supply voltage if you change component values, but just changing the supply voltage without changing anything else won't increase the current capability.What makes you think that?
I posted a link previously and you seem very familiar with the spec sheet, it's 2 ohm output shows current limiting
as to SOA , it's academic, no analysis would be necessary in saying the SOA would be better served by lowering operating voltage ...
Obvious current limiting
Obvious, yes, but what is limiting the current? The amp (why?) or the power supply?And again, why would lowering the supply voltage make any difference - unless you redesign the amp for a lower supply voltage and lower load impedance?
Look at power vs thd @ 2 ohms , the Knee takes place at 100 watts, technically this is the sweet spot , 100 watts at 2
So yes, there is nothing in the technical papers that would lead me to believe this is a stable low Z design for continuous low-Z operation
by lowering the output voltage but with the same VA capability , you will have a more stable amplifier ..
I will say this one more time - the nc400/smps600 combination isn't just some ideal simple transformer where you can arbitrarily trade voltage for current within the same VA capacity / power. To take benefit of a lower supply voltage and a lower load impedance, you need to (at least) adapt component values.
I"m willing to test yours at 1 ohm for you, if you are that confident about the smoke staying in ......
I was going to do my own supply, hence the questions if it was possible , i thought that was understood based on where we were going with this ...
If the smoke stays in when driving a 0 ohm short, it will stay in at 1 ohm. At some point, lowering the load impedance, the overcurrent protection will kick in, as a lot of people have discovered.
Whats that value .....?
There are so many fantastic sounding speakers that don't present such unmanageably low loads of 1 Ohm. Why bend over backwards to accommodate these unusual constructions? I mean, you could design an automobile engine that requires jet aviation fuel, but why would you want to?Steve
24 A, according to the Good Datasheet.
Unless you're a PHD in amplifier design, have a full understanding of the workings of the NC400, and have a fortune to throw at this linear supply, several times more than the amp itself, you're wasting your time, IMO.
Most SOTA speakers will represent a 2ohm load , some ESL's will get down below 1ohm and worse are capacitive
Ps : There are no great amps not capable of driving a Low-Z load ...
