It looks to me like you would be under-specced with that combo… although it certainly might WORK, and be totally fine.
Alternate suggestions:
The new Truetone CS-6 should DEFINATELY fit under a Templeboard…. if it has enough juice for your setup.
I (and others) use a CS-7 with my H9, and it is flawless. . . and would PROBABLY be doable on a templboard….but maybe not.
For reference: Heights:
Show More...Powerfactor: 1.75″
Cs-6: 1.22″
CS-7: 2″