powering TPA3116 with 24V - how much ampere

[mamocel]

I see. Any recommendation for quite fans operate on 24V ?

lower the fan voltage with an lm 78xx or lm 317 regulator adjustable to your wishes...

btw - those mean well supplies - I am planning to mount it inside a wooden box - does it have place for mounting screws? It is not so obvious from the pics

Personally, I fixed small aluminum brackets on the sides, there are M3 or M4 threads.

 

[rlogjk]

Does it make sense to use two of those quiet fans? (using with 12V not PWM) .
I was thinking to install one fan to push air and the other on the other side of the box to pull the air out. Make sense?

 

[mamocel]

Personally, I prefer passive cooling for the sake of noise...
On an 8 ohm load with mono PBTL amps, there should be no problem.

 

[rlogjk]

Personally, I prefer passive cooling for the sake of noise...
On an 8 ohm load with mono PBTL amps, there should be no problem.

What does it means passive cooling?
Do you think no cooling is needed and the built in heatsink of each amp is enough?

 

[mamocel]

Yes ! Ventilation by natural convection...
High and low natural ventilation.
In short, not a waterproof case.

 

[rlogjk]

In short, not a waterproof case.

Both the amplifier box and the Mean-well 24V PSU box will be made from 4mm plywood. Do you think shielding both boxes using copper tape is necessary?

 

[mamocel]

No, the power supply already has an aluminum box which acts as a Faraday cage.
You can put everything in the same box.
Experiment yourself, you learn better from your mistakes!
Merry Christmas! 🥂🍸🍗🥩🧀🍾

 

[stratus46]

Can I connect the speaker to the amp output using RCA female socket? or better to use speakon connector?

Highly NOT recommended. The TPA3116 is a fine amplifier but is is a 'bridge' amplifier
meaning there is no common ("earth", ground to us North Americans). To make it more
interesting, the datasheet does not include ouput coupling capacitors. The chip runs on
a single supply so both outputs, '+' and '-' are at 1/2 power supply, net Voltage across
the load is 0. Your connectors have to have nothing exposed like an RCA plug does and
must not be 'mixed up' with any other connctors in the system. Do NOT short the outputs
to anything else. I'm fully agreed on switching supplies for class D amps.

Merry Christmas

G²

 

[rlogjk]

So using a powerconn connectors and sockets is a good choice?

 

[mamocel]

So using a powerconn connectors and sockets is a good choice?

It's more PA amp oriented...2 poles are enough.
As said above, the - is not connected to mass or earth..
Do not connect an active subwoofer to the high level stereo terminals, the 2 negative poles are often connected together.

 

[rlogjk]

I'm sorry to insist but I'm not sure I understand.
The powerconn sockets and connectors have 4 connection points.
1+, 1-, 2+, 2-

the output of the amp + will be connected to the 1+ and the output of the amp - (gnd) will be connected to the 1- . same at the speaker side. The + of the speaker (red wire) will be connected to 1+ and the gnd of the speaker (black wire) will be connected to the socket 1- .

Is the above configuration is right and should eliminate any shorts that should avoided?

 

[mamocel]

Is the above configuration is right and should eliminate any shorts that should avoided?

It should be fine, only 2 useless pins...
The purchase price of the 16 Speakon connectors will certainly exceed the purchase cost of the 8 TPA3116....?

edit: I just saw your link....Cheap counterfeit indeed!