Will the increase in voltage rails provide any benefits? You'll be dissipating more heat, but will you be getting more power out of Aleph J...?
In my system, it has to a reasonable degree. Is it subjective? Perhaps but unlikely. Overall this certainly has some dependency on the speaker load. Peak power depends on the I-V phase relationship, when they're in phase, full power is delivered. If I (and I haven't) connect the amp up to my test load cell where there's a couple of Arcol 8 ohm, 300W non-inductive load resistors and measure, power will be higher! All other things equal in system there is more energy with the preamp at the identical output on the same track. But a speaker presents a complex load that includes inductance, so it could present more power based on the signal that's being driven at that time. (voltage vs current delivery) What I'll probably end up doing is bumping the current back up to around 430mV/470R to take full advantage of the higher voltage. BTW - the Plitrons are MUCH better at the same VA rating for current delivery of the Antek! I can tell you (and as your quetion alluded to) it runs warmer at the higher rail voltage, the cooling fans cycle more and longer (depends on room temperature too) If you want to find out yourself, go the other way - reduce your rail voltage and see if it has less volume. I think the answer is clear.
One important thing I've learned about the AJ is to just listen and let the ears decide. I have a bench of equipment to perform qualitative tests - the load cell, an Agilent scope with FFT, an HP 8903B test set, and PC based software. So far I've refused to bend and connect it up because when I make changes and listen, that's the real test. You know the quote from NP: "
We should no more let numbers define audio quality..." I'm a believer.
I used to live by the design numbers - total modelling on LTSpice/PCAD, make a board, bench test and tune it using all the instruments and finally listen, only to find that it wasn't so good. But all parameters of simulation and test said it
should be. That's wrong! There's magic in the approach of NP's thoughtful, intellectual designs and the sound proves it! We get to take advantage of it for the cost of parts and time. What a great deal! So I tip my hat to the man that made this great sound possible - Nelson Pass.
Hope my answer to your question didn't get lost in the blither,
@Extreme_Boky!