Fundamental	2nd	3rd	4th	5th	6th

		     B&C 12PLB100
100Hz		0.50%	0.72%	0.25%	0.04%	0.02%
200Hz		0.78%	0.51%	0.12%	0.02%	0.01%
400Hz		0.79%	0.45%	0.07%	0.01%	0.01%

	      Eminence Definimax 4012HO
100Hz		0.95%	0.77%	0.34%	0.03%	0.05%
200Hz		0.82%	0.67%	0.32%	0.04%	0.03%
400Hz		0.75%	0.53%	0.26%	0.03%	0.02%

	        Eminence Delta Pro 12
100Hz		2.12%	2.23%	1.63%	0.44%	0.16%
200Hz		2.37%	2.56%	1.33%	0.31%	0.18%
400Hz		2.54%	2.34%	1.12%	0.38%	0.14%

There are different components used for some drivers. For example, the PSD2002 uses different R1/R2 values than the DE250. The Delta 12LF uses a different capacitor in location C4 than the other midwoofers. But there are no major changes required for the new drivers. The Delta Pro 12 and the 12PLB100 use the same crossover components as the Definimax 4012HO.

I´m about to pull the trigger on Delta Pros. Still a bit unsure if these will give me a significant update compared to the 12LFA? I feel that there's quite a bit low end output and kick missing.

• Room modes, multisubs and flanking subs
  
• Helper Woofer Location
  
• Flanking Subs vs Helper Woofers
  
• A better way to mitigate baffle step than using BSC
  

Checking in to see if anyone have upgraded or built new 3Pi:s with
either the B&C 12PLB100 or Delta Pro 12A?

As @Mudshark said, the B&C availability
isn't very good. Blue Aran in the UK seem to have
2pcs coming in the middle of this month.

I´m about to pull the trigger on Delta Pros. Still a bit unsure if
these will give me a significant update compared to the 12LFA? I feel that
there's quite a bit low end output and kick missing.

I read what @Symphonimind wrote earlier.
"I have tested both Delta 12LFA and Delta Pro 12A, the latter destroyed Delta 12LFA in every single way. Delta Pro 12A can also be tuned to play exceptionally good down to 40Hz."

Any thoughts on difference in bass output between these two drivers?