Greetings from the Texas coast. I'm making a custom mixer/amp/receiver with crossovers/bandpasses/inputs, mids, highs, and a sub

Howdy folks. I taught a few semesters of university level E&M labs in a physics department in another lifetime (when I was in grad school). I've become a pretty seasoned roboticist already, but I'm learning about making audio systems right now. One of my startups (http://indiejamland.com) revolves around music, and so I'm making a custom mixer/amp/receiver with crossovers/bandpasses/inputs, mids, highs, and a sub. It will be portable, one piece, and powered by a car battery with solar charging option.

I still haven't finished transitioning my webserver off of the cloud to a physical server, so it's not super fancy yet -- don't judge me. I'm actually making custom hardware firewalls, while I'm making custom audio electronics, along with 10 or 12 other projects, so don't expect my full attention.

Right now, I'm looking for .mod, .pretty, and .kicad_mod files for tpa3221 and lm386, so obviously, in addition to 100W/200W amps, I'm interested in op amps too. I may need more power later on, too, so what's the next step up from the tpa3221?

Also, I'm curious about alternative suppliers. I was doing business with Mouser Electronics, but they went to the dark side of the force, so to speak. Digikey is a reasonable alternative, but I feel like I'm two-timing my fellow Texans by doing business with them.

Before you think, "aw man, we can't just answer all his questions now -- he'll never need us again..." Realize that I'm also here to network, so I may pop in and out here and there in the foreseeable future. Plus, I'm bound to have other questions later -- not to mention, I may actually be able to help you with your electronics projects.
 
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I'm making a custom mixer/amp/receiver with crossovers/bandpasses/inputs, mids, highs, and a sub. It will be portable, one piece, and powered by a car battery with solar charging option.
That sounds like I would have made my first post... but 35 years ago. **
Nowadays I find the speciality in each piece of the 'rack' for the so called domestic hi-fi experience, which seems pure utopia but some swear to hear big things, so let's go ahead
What you propose can be done easily, I mean schematical/tree logic blocks - in digital domain OR in the analog domain (!). Or both. Both will employ large use of integrated circuits, smd components, attent study of the physical execution and all those things will stay on one board. The power boards will need to stay where transfer of heat is possible, eventual interferences etc. all those need a preliminary try, testing.
Good luck
** And in the early nineties...I remember hearing " You start me up" as the music for the presentation of a big new OS, that was late '80s
 
That sounds like I would have made my first post... but 35 years ago. **
Nowadays I find the speciality in each piece of the 'rack' for the so called domestic hi-fi experience, which seems pure utopia but some swear to hear big things, so let's go ahead
What you propose can be done easily, I mean schematical/tree logic blocks - in digital domain OR in the analog domain (!). Or both. Both will employ large use of integrated circuits, smd components, attent study of the physical execution and all those things will stay on one board. The power boards will need to stay where transfer of heat is possible, eventual interferences etc. all those need a preliminary try, testing.
Good luck
** And in the early nineties...I remember hearing " You start me up" as the music for the presentation of a big new OS, that was late '80s
I have heat sinks and fans ready to go, when I put vents on this puppy. That makes me think to put the strobe lights in a separate compartment. I'm making the two main amplifiers from chipsets, so I suppose the first project is making custom amplifiers. I'll worry about the rest later. Thanks for the warm welcome.