You need to be squinting a bit closer at the specs.
Carvin normally rates their products in RMS, Program and Peak. For example, a PM12a powered speaker has a 400W RMS amp built in. That would translate to 800W Program (in Yamaha-speak) and probably (conservatively) 1200+W Peak. It weighs 27 lbs (and these things have been drop tested to 8'). That's a $279 speaker and it's powered.
The Mackie Thump 12a powered speaker rates its amplifier at 400W *PEAK*. Likely half or less that number RMS wattage. Max output is 115 dB. It's underpowered and not even in the same league as the Carvin, but costs $269.
The Yamaha A12 is a *passive* speaker that rates at 150W RMS, 300 Program and 600W Peak. It weighs 34 lbs and is likely made of wood and covered with rug. That's a $229 *passive* speaker.
The Carvin equivalent passive speaker is rated at double the power, has 3 dB more sensitivity (this is like doubling your power), weighs just 24 lbs and costs $179.
Why does this seem like a no-brainer to me?
Kinda gives “no brainer” a new meaning…

Cheap, horrible reviews, in the Carvin forum, no less... and we won’t even talk about resale value.
"Frequency Response: 50 Hz - 18 kHz (-10DB)
Maximum SPL: 124dB peak"
Not only didn’t I see any mention of “RMS” in the Carvin spec’s... but watts mean absolutely nothing in a powered cab, it’s about SPL and sound quality.
I’ve got some powered 12" RCFs that are rated at a measly 350 watts… I don’t think you’d want to “line 'em up”, so to speak.