I have a rockford fosgate 650w in my 2011 eclipse GT. It’s quite frankly good enough for me as it is. It’s got a 10 inch in a scealed enclosure and it’s loud enough to shake the mirrors pretty damn good. Well balanced, too. For a setup that’s 12 years old, it’s very well put together.

The only downside is the amount of rattles in the car.

It might not be super impressive to the average basshead, but it’s by far the best one I have ever heard as a factory setup.

Design of the PCB, shielding, quality of the parts, Q&A etc.

Couple other aspects you might have neglected to consider:

• Interface; good buttons, good placement, good cable location, etc; basically, how you interact with the thing
• Durability. Cheap parts might not last as long, or stay within specs as long or in varying conditions (heat, air pressure, etc). Better connectors, better wiring.
• After sale support

I don’t care where it’s made. The end product and associated services are what matters.

The reason I usually try to buy stuff from first world nations are because the quality is usually here. You ain’t paying a factory worker 20+$/hr to make a shitty headphone.

If it’s a good quality product that’s still made in china for example, and the service is not in india (because good customer support in india doesn’t exist), then I’m fine with it.