Make up for a highly undersized sealed enclosure using aperiodic loading

[Defo]

I would like to use a highly undersized enclosure for my pair of Seas A26RE4 of only 10-12 liters, allthough it really wants +/- 80 liters...

Could some heavy aperiodic loading work, or is this case too extreme?

[Flaesh]

imo too extreme.
20 and more
only 2"+ each box size..

[Dr.EM]

A Linkwitz transform circuit could correct for an undersized sealed enclosure more effectively. It could also extend the low frequency response as well as correcting the increased Q of the undersized box, but be aware of increased power requirements and dissipation.

Active Filters

Aperiodic loading is said to increase apparent box volume by 20% at best, so 12L would be too small, you'd get a very high Q peak with most drivers.