Since the original link is dead, I repost
In order to meet my needs, I made some simple modifications. The diagram is in the attachment. Forgive me for being a novice. Please help me to see if there are any errors. Thank you for your help. I know I used a clumsy way to do balanced output, which is very troublesome to build. I want to choose drivers such as DRV134, but they are very expensive. I want to know if there is any way to simplify my schematic. Regarding mono switches, I know they add extra volume, but I don't think they are used often, so it doesn't matter.Regarding the "input" buffer part, I'm not sure if the impedance is enough, I always feel that I have set a lot of extra parts, but I'm not sure.
Because it was too messy, I re-drawn the wiring diagrams (they represent only one module, please ignore the pins that are not drawn)
In order to meet my needs, I made some simple modifications. The diagram is in the attachment. Forgive me for being a novice. Please help me to see if there are any errors. Thank you for your help. I know I used a clumsy way to do balanced output, which is very troublesome to build. I want to choose drivers such as DRV134, but they are very expensive. I want to know if there is any way to simplify my schematic. Regarding mono switches, I know they add extra volume, but I don't think they are used often, so it doesn't matter.Regarding the "input" buffer part, I'm not sure if the impedance is enough, I always feel that I have set a lot of extra parts, but I'm not sure.
Because it was too messy, I re-drawn the wiring diagrams (they represent only one module, please ignore the pins that are not drawn)