# Topping PA5 II Stereo Amplifier Review

## Rate this stereo amplifier:

• ### 4. Great (golfing panther)

• Total voters
328
[СПОЙЛЕР] [/СПОЙЛЕР]

30v*20 000Hz= 600 000 ???
600 000 V/s = 0.6 V/μs. But that is assuming 20 kHz, the topping goes higher.

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.

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.

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.

Please excuse me, I’ve never used a 12v trigger before.

What size/type cable do I need for this amp?

Many thanks.

Please excuse me, I’ve never used a 12v trigger before.

What size/type cable do I need for this amp?

Many thanks.
3.5 aux cable will do (either mono or stereo) but you may want to check the other end too. For example, wiim uses 2.5.

3.5 aux cable will do (either mono or stereo) but you may want to check the other end too. For example, wiim uses 2.5.

That’s exactly what I’m looking at.

Will any 3.5mm to 2.5mm cables? I’m seeing lot for sale on Amazon UK described as audio leads for headphones, etc.

Will they be okay?

That’s exactly what I’m looking at.

Will any 3.5mm to 2.5mm cables? I’m seeing lot for sale on Amazon UK described as audio leads for headphones, etc.

Will they be okay?
That should do it (mine is also a stereo audio cable)

That’s exactly what I’m looking at.

Will any 3.5mm to 2.5mm cables? I’m seeing lot for sale on Amazon UK described as audio leads for headphones, etc.

Will they be okay?
Pretty much any cable with the right size plugs will do - it is DC at very low current, so even
a few strands of copper will do...

The vanilla version has fallen in price at Amazon UK from £250 to £220, whilst the Plus version has fallen from £330 to £290.

Hello people! Does the PA5 II fail easily as the first generation PA5?

Hello people! Does the PA5 II fail easily as the first generation PA5?
It seemed to me, but I was disassembling my own and looked, the manufacturer did a good job. he did work on the errors, he separated some buffers from the main preamp circuit!

Hello people! Does the PA5 II fail easily as the first generation PA5?
There haven’t been many reports.

There haven’t been many reports.
My two cents: I have two PA5 IIs in daily use for a year and a year and a half respectively, and they work flawlessly ever since.

Hello people! Does the PA5 II fail easily as the first generation PA5?
I've had mine for nearly a year and have had it on without turning it off now for 7 months with no issues.

Anyway got my from amazon; it lasted 1 hour than it completed stop working with no sound from both SE and Balanced inputs.

Anyway got my from amazon; it lasted 1 hour than it completed stop working with no sound from both SE and Balanced inputs.

Wow! Given you asked that question here before ordering, what are the chances of that!

Wow! Given you asked that question here before ordering, what are the chances of that!
Actually hope that it's just a very weird coincidence

Does someone use the PA5 II as a power amplifier? I mean controlling the volume just with a preamplifier/dac?

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