I have had a lot of amps in my time and the specs never told the true story.
PG M25 12.5 wattsx 2 stable into any inductive reactive load.
US Amps VLX-400 200x2 at 4 ohms 44" long and 4 8ga power feeds stable to 1 ohm
US Amps VLX-200 100x2 at 4 ohms same as above with different rail voltage but rated stable to 1/2 ohm
Autotek 333 165.5x2 at 4 ohms stable to 1
PPI A1200
PPI Pro-Mos 425
Hifonics Series VII Colosuss Aphrodite, boltar and Zues
Lanzar Opti50c
I dont think any one of those amps was much below $1000 and the rated power was usually under 500 watts and many were under 100.
It was because I could run 3 Autotek 333, and still be under 1000 watts total system power.
4 M25 in under 100 watt class etc.