Topping PA5 II Stereo Amplifier Review

[Maxon]

[СПОЙЛЕР] [/СПОЙЛЕР]

 

[Julf]

30v*20 000Hz= 600 000 ???

600 000 V/s = 0.6 V/μs. But that is assuming 20 kHz, the topping goes higher.

 

[antcollinet]

600 000 V/s = 0.6 V/μs. But that is assuming 20 kHz, the topping goes higher.

It does faster anyway it goes max positive to max negative AND BACK AGAIN at 20kHz. So first double that slew rate. Plus a significant part of that time it is going much slower. You need to be looking at the speed at the zero crossing point When the slope of the sinewave is steepest.

 

[Julf]

It does faster anyway it goes max positive to max negative AND BACK AGAIN at 20kHz. So first double that slew rate. Plus a significant part of that time it is going much slower. You need to be looking at the speed at the zero crossing point When the slope of the sinewave is steepest.

And at that point the slope (derivative of the sine function) is A*ω , so actually you need to multiply by 2π.

 

[antcollinet]

And at that point the slope (derivative of the sine function) is A*ω , so actually you need to multiply by 2π.

So the Pa5 can put out 29V peak (A is 29, 53W unclipped into 8Ohm)

so slope is 29x2xpix40,000 = 7.3V/us (Pa 5 is more or less flat to 40kHz - and actually goes up to 60 or 70kHz, so the real figure will be still higher.)


Someone please correct me if I've messed up there at all.