I'll also point out Anthem spent a bazillion dollars and drove many engineers with master's degrees insane to bring the M1 to market. That 1U monoblock with an SMPS and class D amp costs 5 grand and can dump 1000W into a 4 Ohm load and double that into a 2 Ohm load with vanishingly low noise and almost unity power factor.

What it can't do is provide the 4500W of dynamic power out of a standard North American outlet that the 1500 can. The 1500 does that with a power supply I could have designed in Grade 11 and can be easily repaired.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated