Topping PA5 Review (Amplifier)

[Klint]

Would the PA5 risk to be damaged if the switch is on al the time and powered up from a power strip?

 

[iakovis]

Balanced TRS imputs: Which is the right way to attach a CD player or a Streamer to these nice inputs?

 

[Eggs Ackley]

Which is the right way to attach a CD player or a Streamer to these nice inputs?

Through a nice balanced DAC such as the matching Topping E50 which has three switchable inputs for USB, optical and coax connections.

 

[Zek]

Balanced TRS imputs: Which is the right way to attach a CD player or a Streamer to these nice inputs?

With RCA to TS cable, something like this

 

[anotherhobby]

Would the PA5 risk to be damaged if the switch is on al the time and powered up from a power strip?

I don't see how it would get damaged, but don't take my word for that at all as I have no idea at all. What I do know is that's what I'm doing with my desktop system that has a PA5 in it. The speakers will make a "pssshhh" noise when you do it. It's not very loud, so I can't see it doing any damage to the speakers, but depending on your situation it could definitely be annoying. Maybe @JohnYang1997 can tell us if what I'm doing is actually bad or or not.

Once my office has been vacant for 10 minutes, a power strip that has two desk lamps along with all of my audio gear turns off. I'm never in the room to hear the noise, so I don't care about it. I've assumed it's fine, but I'd think the ideal way would be to find the male/female connectors Topping is using between the amp and the power adapter, and make a intermediate cable between the amp and power supply that's switched instead.

 

[anotherhobby]

Balanced TRS imputs: Which is the right way to attach a CD player or a Streamer to these nice inputs?

I'm using these TS to RCA adapter plugs, an they work great. Your unbalanced device probably won't drive the amp to full power due to gain. There is a ton of info on that in this thread.

 

[BoredErica]

pa5 came in. No speakers yet to test. The binding posts are secure and build quality is fine as far as I can tell.

 

[bsas]

Balanced TRS imputs: Which is the right way to attach a CD player or a Streamer to these nice inputs?

Again, you can get RCA to TS cables (or adapters). It works too, it will just be lower volume.

 

[bsas]

simply not true.

OK... It will drop the volume in half

 

[antcollinet]

OK... It will drop the volume in half

it will drop power by about 40% assuming the RCA outputs deliver 2V max. Power is not volume. you need approx 10x power to perceive a doubling of volume. 40% less power (about 2.2 dB) will typically be perceived as about 11% drop in volume

 

[Maciekw]

OK... It will drop the volume in half

This is true if the input is based on a differential amplifier. If not (as it is in the basic TPA32XX application), the power will be 1/4 of the nominal power.

 

[antcollinet]

This is true if the input is based on a differential amplifier. If not (as it is in the basic TPA32XX application), the power will be 1/4 of the nominal power.

Again no - the amp sensitivity is 2.6V Deliver that and the amp outputs full power. If an RCA output delivers 2V, that is 2.2dB down on 2.6V, or 40%down on power.

 

[Eggs Ackley]

Clearly this amp was designed to be used with balanced connections, anything else is a poor compromise at best. Just use it the the way it was intended or use a different amp that suits your needs.

 

[SaltyCDogg]

Clearly this amp was designed to be used with balanced connections, anything else is a poor compromise at best. Just use it the the way it was intended or use a different amp that suits your needs.

I disagree. I agree that using with a balanced source is the most 'optimal', but that doesn't mean that anything else should be avoided.

There are a lot of people in this thread using with a variety of non balanced sources who are very happy.

 

[Eggs Ackley]

I'd offer an argument but I'm too busy trying to figure out how to get my car to run on two wheels.

 

[Maciekw]

Again no - the amp sensitivity is 2.6V Deliver that and the amp outputs full power. If an RCA output delivers 2V, that is 2.2dB down on 2.6V, or 40%down on power.

The main power problem is not in the input signal level, but in the topology of the bridge amplifier circuit and the output voltage at which thd is 1%. Look at the attached picture.

 

[Lambda]

Look at the attached picture.

But this is not how the PA5 works.

 

[Lambda]

Clearly this amp was designed to be used with balanced connections, anything else is a poor compromise at best. Just use it the the way it was intended or use a different amp that suits your needs.

What do you think balanced even mean?

 

[Maciekw]

But this is not how the PA5 works.

This we do not know, as there is no information about the input module. Are they regular opamps that amplify the signal, or is it a differential amplifier?

 

[tvrgeek]

That looks very interesting, I'll await a review hopefully from Amir.

ice module. All of them I have heard were terrible. 30 year old design. I hope for them I am wrong, but the PA5 seems to be todays most current design.