Ok Steve,
I apreciate your .02 Cents....
I attach the frequ response from the hornresp model of the LAB Horn with LAB12(black) and With that TC speaker(gray). (
20Vrms@1m distance )
I don't want to tell you which one is better suited for this application. You can chose by yourself. The Math is not that easy: STronger motor= better speaker for every applications!
Question is, what is your goal with a the LABHORN? What would you like to change on it? Low frequency corner? Sensitivity? More flat response? More Power handling? SPL?
The LAB12 speaker was designed by Tom Danley with the goal in Mind to get the maximum achivable sensitivity and low freq. extension in that HORN. What you can increase is Power handling, and/or decrease Power compression to get more SPL out of this design (LABHORN), meaning you could use a driver with very similar T/S parameters, just with more power handling/ better cooling etc.
FYI to get the fully potential of the LAbhorn, one could stack 6 or even 8 LAbhorn elements together to get the right horn area.
In this case the efficiency is around 50% of the system, which can't be further increased.
You can stack up more cabinets to get more directivity and more total Power handling and thus you will get more SPL.
I hope this makes things clear.
all the Best,
Tamas
EDIT:
The graph was made with the condition quarter space! This means, that for 4 LAbhorns in Halfspace (each driven by 20 Vrms) at a distance of 1 m you should add to this graph 6 dB!