There's a Monarchy SM70 listed for $400 (no relation). Wouldn't hurt too much to try.
Frankly, wrong speakers for the application if you want "farting" level SPL's. Staying dipole/planar, there's Genesis and VMPS (RM60/sub, Supertowers) for that and you can still use the correction of the DEQX and parts of the active crossover (up to 120 Hz high pass for Genesis).
Frankly, wrong speakers for the application if you want "farting" level SPL's. Staying dipole/planar, there's Genesis and VMPS (RM60/sub, Supertowers) for that and you can still use the correction of the DEQX and parts of the active crossover (up to 120 Hz high pass for Genesis).