most midranges suffer at 250 Hz.

Midwoofer combines "woofer" and "midrange" not the tweeter.

Typically cover 50-2500 in a ported box with a 1" tweeter covering 2500-18 000.

You don't need a sub if you choose the right woofer.

Unless you want more than 120 dB OR much below 30-40 Hz.

Both are dumb in a car.

High SPL = no hearing.

Low frequencies = rattling everything.