Hi Don i bought a 2226H 2nd hand and have it blasting away on ten watts (later to be 240watt)Wayne has his own good plans for it Pi style..
Caution,in an EBS tune like mine,175L 33hz tune,the power is limited,not 600watt rms ,i forget the actual value perhaps 300-400watt within Xmax..
I have modeled it in my own basshorn however the lab12woofer gave me what i wanted in a tiny box(its specificaly designed for horns)
The jbl2226h certainly is a beast at 97db efficiency also.See my response on my site,and see how i describe it :-)
Cheers
Mike.e