I recently had the same criteria. For less than a foot tall you could look at the following:
B&W CM1 $900 new, port can be plugged, I believe.
ProAc Tablette Reference 8 - @ $1400 new.
Dynaudio Focus 110 - @1400 new.
All are rear port. Don't know how deep your shelf is to interact with the rear ports.
At the size you are looking at, if ported it will be located on the rear. Not much room left in the front. Or sealed. I believe the Spendor S3/5 and Harbeth P3 are just at 12".
Don't know your associated equipment, but these are some I looked at with my solid state (Naim) gear.
Hope this helps.
B&W CM1 $900 new, port can be plugged, I believe.
ProAc Tablette Reference 8 - @ $1400 new.
Dynaudio Focus 110 - @1400 new.
All are rear port. Don't know how deep your shelf is to interact with the rear ports.
At the size you are looking at, if ported it will be located on the rear. Not much room left in the front. Or sealed. I believe the Spendor S3/5 and Harbeth P3 are just at 12".
Don't know your associated equipment, but these are some I looked at with my solid state (Naim) gear.
Hope this helps.