Tuning my speakers reminded me a lot of my old project car.
20 years ago I paid a friend of mine $300 for a standalone EMS(megasquirt) that he’d put together from a kit.
It came in a box with a wiring harness that consisted of a bunch of different color wires soldered to a DB25 connector.
Over the next two weeks I wired up the Fuel injectors, ignition module, and a wide band o2 sensor, in addition to the temp and MAP sensors necessary for the little box to know what the engine was doing.
There was a base fuel and ignition map that came with the kit and it was enough to start and drive the car.
Over the course of the next few days there were a number of tuning sessions on country backroads with my laptop hooked up logging the air/fuel ratio vs RPM and a lot of other metrics.
After a run getting some logs I would analyze the charts and numbers and make some changes to the fuel numbers etc and save them back into the prom in the box and then go for another rip around the “block”.
After enough iterations the car was running much better than it had on the OEM Bosch engine management.
At the time I saw lots of folks try the same setup on nearly identical cars and not get anywhere with it.
The ability to follow directions and understand what you are seeing is apparently something of a rare gift and translates into many hobbies, not just cars and speakers.