low-cost XLR and RCA input panel

[opusadat]

I'm searching for a circuit board that has RCA in, XLR in, and XLR link ports. In our local market, this kind of board is not available. I tried building a PCB from this schematic. but it goes to complex and expensive too.

I would like to know

1. How do I reduce the circuit complexity?

2. If I reduce, will it become too poor output?

3. will it worth to build?

I am looking forward to your valuable opinions.
Thanks

opu

 

[rayma]

How will you use the board? How many inputs and outputs do you want? What are the binding posts for?
It's unlikely you will find an existing board with all the features that you want.

 

[opusadat]

Hi, Rayma... I like to use this board as back panel of a PA Amplifire. I have attached a sample image. 🙂
Thanks

 

[rayma]

Are you replacing an existing panel, or building the PA amplifier entirely new?
A pcb won't have the mechanical strength of a steel panel, and a single large PCB will be expensive.

There is no local decoupling for the op amps on your schematic.

 

[Turbowatch2]

If you ask yourself why and if you could ever need that much of a complicated input/ output mixup, you will realize this is too much hardware for something never happening.

You can be 100% sure, if something makes sense with a PA, you can buy it, ready and finished, from cheap to expensive. If not, no one needs it.

 

[opusadat]

Are you replacing an existing panel, or building the PA amplifier entirely new?
A pcb won't have the mechanical strength of a steel panel, and a single large PCB will be expensive.

There is no local decoupling for the op amps on your schematic.

For a new Amp....

 

[rayma]

Then you are building a new PA amplifier? I would have a steel rear panel, with the connectors attached to the panel with bolts.
The pcb can be soldered to the connectors and be supported by them. I would not otherwise bolt down the pcb, as there can be
mechanical stress on the solder joints if both the connectors and the pcb are bolted down.

 

[opusadat]

If you ask yourself why and if you could ever need that much of a complicated input/ output mixup, you will realize this is too much hardware for something never happening.

You can be 100% sure, if something makes sense with a PA, you can buy it, ready and finished, from cheap to expensive. If not, no one needs it.

only this type of board is available and price is too high around $40-45. if I build that it will be not more then $25!!

 

[Speedskater]

Remember:
with XLR, pin 1 is only the shield and attaches to the metal chassis at the connector.

with RCA, the shell is both the shield and the signal return.
So it attaches to the metal chassis at the connector and to the audio circuit common.