I see a lot of lamentation for high end audio going away but the reality is that it's not that hard to achieve if you are truly interested in its effects.

You can build loudspeaker cabinets yourself without a lot of skills. There are kits everywhere. These will dramatically outperform anything you can buy retail even if you do a mediocre job of assembly. Most aspects of a high quality audio solution involve the room itself, not the equipment inside of it.

Building something that replicates (for instance) the Polk RTI series would take a weekend for a total noob if working from a kit. You can buy pro amplifiers like QSC and Behringer that satisfy whatever topology and power level you desire. Vendors like MiniDSP give you everything you need to build an active crossover solution in an afternoon.

Simply knowing that these things are possible is the first step to achieving them.

DIY: https://www.parts-express.com/speaker-components/speaker-sub...

Pre-built: https://www.monoprice.com/product?p_id=43155

Emotiva is also a very good vendor.

You don’t even need to DIY, you can just pay an amount of money similar to the cost of 1970s hi-fi systems after adjusting for inflation. The nice hi-fi systems are still around, but they don’t look at all like old hi-fi (why would they? both taste and technology have shifted drastically) and you don’t see them available at retail brick-and-mortar stores like Best Buy.

You can even go all out with making custom enclosures, DIY Perks has some great videos on DIY audio. https://www.youtube.com/watch?v=XEspOD1NHr0&list=PLOJU8YJjFw...

Ohh cool that’s a new hobby unlocked. Could a DIY speaker really sound as good as a high end speaker?